How does caffeine reach the brain after someone drinks a cup of coffee or tea? In your answer, be sure to identify the systems involved.

Answers

Answer 1

Answer:

When we drink coffee, caffeine binds to our brain's adenosine receptors, preventing the chemical from binding with the receptors and making us tired. For those of us who regularly drink coffee in copious amounts, our brains develop more adenosine receptors, so it takes more coffee to keep us awake.

Answer 2
There, caffeine interacts with some neurotransmitters and promotes central nervous system's stimulation. ... Then, central nervous system's receptors send impulses to endocrine system to secrete some hormones that will affect person's behavior.

Related Questions

Barnacles and mussels are filter feeders that attach themselves to rocks in the ocean. They eat by filtering small particles of food from the ocean water as it flows over them. A scientist observed a dense colony of barnacles covering the surface of a rock. The mussels were only able to attach to a few, small crevices on the same rock.

Evaluate this observation and explain a limiting factor that is affecting the barnacles and mussels on the ocean rock

Answers

Answer:

The barnacles are only able to attach themselves to surfaces in the water. Since the surface is limited, barnacles are attaching themselves to the other barnacles, crowding the rock. The muscles were not able to grow or attach themselves off the surface of the rock. Same thing with the mussels that are growing on the rock. So not only barnacles are crowding the rock, but Mussels as well are crowding the rock.

Explanation:

Oysters and cockles are related to mussels and barnacles. These species can be found in both salt and fresh water. They are marine creatures.

What is limiting factor?

A limiting factor is anything that restricts the size of a population and slows or stops its growth. Limiting factors include biotic factors such as food, mates, and resource competition with other organisms.

These creatures have evolved to live on rocky shorelines. The mussels are filter feeders that take in seawater and filter out particles.

The barnacles are gonochoristic, whereas the mussels are hermaphroditic.

The mussels' zonation is the area around the intertidal zones of rocks, as they require food to grow.

Mussels and barnacles are related to oysters and cockles. These species are found in both fresh and salt water. They are marine creatures.

Thus, this is the limiting factor in the give scenario.

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PLS ANSER THIS ASAP!

Answers

Answer:

number 3

Explanation:

i had this quiz and got it right

Answer:

c i think is the most relavent

Need this for homework
1.What happens when fertilizer ends up in waterways?
2. Describe eutrophication.
3. What has happened at the mouth of the Mississippi River?

Answers

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1. When fertilizer ends up in waterways, the fertilizer gets carried to larger bodies of water. The added nutrients from the fertilizer creates excessive growth of algae, creating algal.

2. Eutrophication is what a water based ecosystem does when too much nutrients are added to it. it’s mainly caused by two nutrients, phosphorus and nitrogen. The biggest problem in eutrophication are algal blooms.

3. At the mouth of the Mississippi River there is a dead zone. Due to algae using up all the oxygen, aquatic organisms can not survive there. Things that can help prevent dead zones are cutting down on fertilizer use and preserving wetlands.


Hope this helps!

Genes are sections of DNA that code for a particular trait. Genes are
A. Carbohydrates
B. lipids
C. proteins
D. nucleic acids

Answers

Answer:

D. Nucleic Acids

Explanation: Since DNA is a nucleic acid, and a gene is a piece of DNA, a gene would also be a nucleic acid.

I’m 99% sure it’s D if it’s not then it’s C

If a tall plant (TT) is crossed with a short (tt) plant, all of the offspring will be: *
A Tall
B Short
C Medium
D Combination

Answers

I am pretty sure the answer is D (combination)

Answer:

C medium I'm pretty sure

Explanation:

because if you add short and tall you would get medium right?

How do cells get energy from glucose? How do they use that energy?

Answers

Answer:

Image result for How do cells get energy from glucose?

Through the process of cellular respiration, the energy in food is converted into energy that can be used by the body's cells. During cellular respiration, glucose and oxygen are converted into carbon dioxide and water, and the energy is transferred to ATP.

Explanation:

If you had to define ecological succession in your own words in a 140 character text, how would you define it?

Answers

Answer: Succession is like winning a race. You get to acomplish something that you wanted to do.  sorry this is short

Explanation:

Ecological succession is when the structure of a biological community evolves overtime. For example, when a tree falls in a forest, the sunlight may be able to reach the forest floor, which would allow new growth to begin.

Part A. Aristocrats and commoners mix freely in Act I, both on the island and on board the ship. Which best describes the relations between the high-ranking aristocrats and the lower-ranking commoners?


A. Commoners speak their minds freely to aristocrats as if equals.


B. Artisocrats and commoners avoid contact with one another.


C. Aristocracts express only contempt and scorn for commoners


D. Commoners address aristocratic politely and respectfully

Answers

Answer:

The answer is option A "Commoners speak their minds freely to aristocrats as if equals"

Explanation:

* A Commoner, otherwise called the common man, plebeians, the ordinary citizens or the majority, is a customary individual in a community or country who doesn't have any critical economic well being, particularly one who is an individual from neither sovereignty, honorability, the pastorate, nor any piece of the gentry.

* The Artisocrat is a social class that a specific society thinks about its most noteworthy order. In numerous states, the Artisocrats incorporated the high society of individuals with genetic position and titles. In a few, for example, old Greece, Rome, and India, privileged status came from having a place with a military position. It has likewise been normal, eminently in African social orders, for Artisocrats to have a place with holy lines. Noble status can include medieval or lawful advantages. They are ordinarily beneath just the ruler of a nation or country in its social progressive system.

* The distinction among Commoner and Artisocrat is that normal person is an individual from the commoners who holds no title or rank while Artisocrat is one of the gentry, respectability, or individuals of rank in a community; one of a decision class, an honorable.

Answer:

the ans is A

Explanation:

Which best explains why sexual reproduction produces greater variations among offspring? *

A The DNA come from two genetically different parents.
B The DNA cells from one parent that is genetically identical.
C The sex cells are produced by mitosis.
D The sex cells undergo self fertilization

Answers

Answer:

A The DNA come from two genetically different parents.

Explanation:

Everyone has different genetics. They are determined by sex cells that are produced by MEIOSIS NOT mitosis. Meiosis allows for genetic variation amoung offspring along with the genetically different parents.

The DNA come from two genetically different parents explains the best reproduction greater variations among offspring.

What is sexual reproduction?

Reproduction is the act of one or more parents creating a new individual (offspring), frequently within the same species. It is among the characteristics of a living creature.

Sexual reproduction, we mean a process where two parents' genetic material is combined to create a child. When two haploid gametes combine, a genetically unique diploid child is produced.

The word "sexual" has a Late Latin etymology that stems from the word sexus, which means "of copulation or generation." The word reproduction is also derived from the Latin words re, which means "again," and productio, which means "creation." Alternative: syngenesis.

Therefore, The DNA come from two genetically different parents explains the best reproduction greater variations among offspring.

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The Punnett square below shows a cross between 2 pink flowers. What is a percentage that a pink flower will be produced? *

Answers

Answer:

50%

Explanation:

rr, rw, rw, ww

one and two please !!

Answers

1. Plants on land have taken up approximately 25 percent of the carbon dioxide that humans have put into the atmosphere. The amount of carbon that plants take up varies greatly from year to year, but in general, the world's plants have increased the amount of carbon dioxide they absorb since 1960.

2. Animals that eat other animals get the carbon from their food too. Carbon moves from plants and animals to soils. When plants and animals die, their bodies, wood and leaves decays bringing the carbon into the ground. Some is buried and will become fossil fuels in millions and millions of years.

BRAINLIEST IF ANSWER QUICKLY

1. Identify a period of time when this population showed exponential growth? Explain how you know this.

2. At what point in time did the population reach its carrying capacity? Explain how you know this.

3. The population's actual growth (in red) often goes above and below the carrying capacity in a cycle, why do you think this happens?

Answers

Answer:

1. 1850

2. it stays on carrying capacity until, about 1835

3. because people are born in generations

Explanation:

1. because the overshoot line grows very quickly around 1850

2. simply an estimate to where i think it lines up

3. once one generation is born, the older one dies.

Answer:

1. Around 1850 is the period of time when the population showed exponential growth.

2. The population reached its carrying opacity technically around 1850 as well but it was much closer to the direct line at around 1870-1875.

3. I believe this happens because of sickness and people choosing to leave the area. (There are many other reasons I am sure you can come up with)

Explanation:

These are the answers that fit best! I a so sorry for taking so long! You should certainly give brainliest to someone else but still-

If you found this to be helpful please leave a thanks, and a rating!

If this answer is correct maybe you can mark my answer brainliest! I hope you do well on your assignment!

~Ace <3

I need help with this question
Why would you expect a dead zone to start near the mouth of a river, where the river flows into a body of water?

Answers

Water pollution comes from many sources. One of the biggest sources is runoff. Runoff moves over the surface of the land and picks up chemicals such as fertilizer (contains vital nutrients such as nitrogen, phosphorous, and potassium - NPK) from agricultural fields, lawns, and golf courses. It carries the chemicals to bodies of water. The added nutrients from fertilizer often cause the excessive growth of algae, creating algal blooms which are temporary phenomena because the large population of algae use up the available nutrients (Figure 2.4c). When the algae die, the decomposing bacteria use up oxygen in the water so that other aquatic organisms cannot survive. This has occurred over large areas of the ocean, creating dead zones, where low oxygen levels have killed all ocean life. A very large dead zone exists in the Gulf of Mexico. Measures that can help prevent these problems include cutting down on fertilizer use. Preserving wetlands also helps because wetlands filter runoff.

The stem of a plant is experiencing phototropism. Which statement correctly describes the plant's response?

Answers

Answer:

A the stem moves towards the light for better photosynthesis

Explanation:

saw it happen

Answer:

The Answer is A  

Explanation:

Growth in plants reflects the way in which they interact with the environment. If we place a strong light at one side of this fuchsia plant, the plant will grow towards it. This is called a phototropic response.

Which of the following is NOT a condition necessary for fossilization to occur?

A. Rapid and permanent burial

B. Presence of heat

C. Lack of oxygen

D. Continued sediment accumulation

E. Absence of compression

Answers

I think the answer is b

Answer:

its b

Explanation:

just took the test

Help!!!!

Match the pea plant with its combination of alleles. Use the groups below for questions 17, 18, & 19.
Combination of Alleles
Two alleles for tall stems
One allele for tall stems and one allele for short stems.
Two alleles for short stems

Answers

True the correct answer is D.

Match each inference about Barrow boy with the clue that best supports it.

Answers

Answer:

children goes with si serńiora, comfort with bed. family is errand

the blue one on the left goes with the bottom one on the right, the green on the left goes with the middle of be on the right, and the orange one on the left goes with the top one on the right, i had this question before, hope this helps :))

PLEASE HELP ASAP!! WILL MARK BRANLIEST

Answers

Answer:hope it helped written by akashaplz mark it brainlist

Explanation:

so i will tell everyone that there was fire for 4 hours and no rescue team were there the fire was blown by a tourist that took the life of 100 animal so as everyone can see the plant are finished everywhere there is only ash and flash of animal .i want to tell the visitors that the rescue was near but they don't show action , as earth is home to many living organism so it is animal right to live in forest and it a request everyone should come and plant seeds so we can recover the forest

20 points Please answer fast

Questions:

1. Were all your answers the same? Why do you think this is?

2. What type of person might have a low resting heart rate?

3. Why is important to know your blood type?

Please answer the picture and questions!!!

Answers

Answer:

Yes

unattached

Nearsighted

I'm also unsure

125bpm

1) Not all of the answers were the same because, everyones heart rate and blood type would be different from each other.

2) Athletes have a low resting heart rate.

3) During blood lost, you'll need a blood transfusion, if you don't know what blood type you have then it's most likely take longer to give you the correct blood type by doing a blood test.

Yes unattached nearsighted

I need help ASAP!!

Is the following sentence true or false?

Only pea plants that have two recessive alleles for short stems will be short.

Answers

True. If it has even one dominant allele that will be the trait expressed (that’s why it’s dominant)

Answer:

TRUE

Explanation:

I believe its true I read about it in a book somewhere.

explain the process of oxidative emtavoiliusm in details

Answers

Answer:

When energy is consumed in a process, chemical energy is made available for synthesis of ATP as one atom gives up electrons (becomes oxidized) and another atom accepts electrons (becomes reduced).

Hope it helps. :T

i will give brainleist In a nuclear power plant, where does the generator get its energy to operate?

directly from the reactor
from the steam turbine
from the electric power lines
from mechanical energy

Answers

From the steam turbine
No 2 from the stream turbine is the answer to your question

Please help me with these questions on the Skeletal System

1. Which is not a function of the skeletal system?
A. Movement and protection B. Homeostasis C. Support D. Transport oxygen-rich blood to the body

2. Which organism has an exoskeleton?
A. A shark B. A human C. A black bear D. A common beetle

3. What is main function of the skull?
A. To keep out electromagnetic waves B. Allows for movement from one place to another C. Produces brain cells D. Protects the brain from injury

4. Tendons and ligaments are used to ___________.
A. Exchange gases within the body B. Transport nutrients to cells C. Produce red blood cells D. Attach bones to muscles and bones to bones.

Answers

Answer:

1 - D- Transport oxygen-rich blood to the body

Explanation:

2- D- Common Beetle

3- D- Protects the brain from injury

4- D- Attach Bones to muscles and bones to bones.

The guy above me is correct on all of them except for the 2 question is B

In what ways is water stored on Earth?
A. condensation, rainfall, snowfall
B. sublimation, transpiration, evaporation
C. ground-water, lakes and rivers, atmosphere, ice
D. ground water discharge, snowmelt runoff, surface runoff

Answers

I believe it is c. Ground water, lakes, rivers, atmosphere, and ice

Answer:

The correct answer is: ground-water, lakes and rivers, atmosphere, ice

Explanation:

I tooook the quizzzz

If one strand of the DNA molecule has a base sequence with 8 nucleotides, how many nucleotides will the complementary base sequence contain? *

Answers

dna to rna or just dna i’m p sure it’s 8

I believe it it is 8

Knowing how food choices impact the function and productivity of cells, why do you think it is important to maintain a healthy diet? What can happen if someone continually eats junk food?

Answers

Answer:

healthy diet prevents and protects from diseases like obesity, heart disease, diabetes, cancer and stroke. constantly eating junk food can lead to obesity and chronic diseases like cardiovascular disease, type 2 diabetes, non-alcoholic fatty liver disease and some cancers.

Explanation:

Maintaining a healthy diet is important because food provides the energy and nutrients that cells need to function properly.

What is health?

"Health is a positive concept that focuses on both social and personal resources as well as physical abilities."

This means that health is a resource to assist an individual in carrying out their societal function, rather than an end in itself.

Junk food can have an impact on cell function and productivity in a variety of ways. A high-sugar diet, for example, can cause insulin resistance, which impairs cells' ability to absorb glucose and produce energy.

This can result in fatigue and reduced productivity. A high-fat diet can also have an effect on cellular function by increasing inflammation in the body, which can interfere with immune system function and increase the risk of chronic diseases.

Thus, maintaining a healthy diet is important for supporting cellular function and promoting overall health and well-being.

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How many and what types of chromosomes are found in every one of your cells?

Answers

There are 23 chromosomes in a cell but I’m not sure what types they are

Paramecia that live in freshwater have contractile vacuoles, while those that live in salt water do not. Why do you think this is the case?

Answers

Answer:

water enters by osmosis, vacuole is used to pump out excess water.

Explanation:

Paramecia that live in freshwater would have contractile vacuole because they will need to get rid of excess water unlike those that live in salt water.

The vacuole primarily functions to get rid of excess water from the cell.

Freshwater is hypotonic to the cytosol of paramecia. Thus, water will always enter the paramecia cells by osmosis. If the excess water is not excreted from the cell, turgidity will result and the cell may burst.

On the other hand, salt water is likely hypertonic to paramecia cells. Thus, instead of having vacuoles for water excretion, a mechanism would have to be put in place so as not to lose too much water to the surrounding salt solution. In other words, a vacuole would be totally redundant in the hypertonic solution.

More on the contractile vacuole can be found here: https://brainly.com/question/13137778

Uranus is which planet from the sun?

Sorry about the subject, there is no science subject so I chose randomly

Answers

Uranus is the 7th planet from the sun :))

☀️sun☀️
1. Mercury
2.Venus
3.Earth
4.Mars
5.Jupiter
6.Saturn
7.Uranus
8.Neptune
Hope it helps!!

The solar energy that reaches a planet is called?
a. temperature
b. insolation
c. light waves
d. brightness

Answers

Answer:

B

Explanation:

the answer is b, insulation is the solar energy that reaches the earths surface
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Which physical feature is in China?a.) Mount Kaliashb.) Taklamakan desert c.) Mekong river The passage is from the National Park Service.Concentrated on a short mile and a half of Auburn Avenue, the Sweet Auburn Historic District reflects the history, heritage and achievements of Atlantas African Americans.The name "Sweet Auburn was coined by John Wesley Dobbs, referring tothe sweet shop serving the local neighborhood.the color of the residents homes.the fragrance and beauty of the trees lining the street.the richest Negro street in the world. #8. Choose the correct form of the adjectives stated in parentheses.Hay un bolgrafo(red) encima de la mesa.O rojasO rojaO rojoO rojos The spinner shown is spun 300 times.a) How many times would you expect the arrowto stop on green if the spinner is fair?The table below shows the number of timesthe arrow stops on each colour.PinkGreenColourFrequencyBlue45Red37Purple725294b) The spinner is spun once more.Estimate the probability of landing on purple.c) If the spinner is spun another 1000 times,about how many times would you expect it to land on blue? The sum of a number x and 8 In Macbeth, what is the paradox stated by the witches in this scene (Act 1, Scene 1)? What does it mean? Barnacles and mussels are filter feeders that attach themselves to rocks in the ocean. They eat by filtering small particles of food from the ocean water as it flows over them. A scientist observed a dense colony of barnacles covering the surface of a rock. The mussels were only able to attach to a few, small crevices on the same rock.Evaluate this observation and explain a limiting factor that is affecting the barnacles and mussels on the ocean rock Select the correct answer from each drop-down menu.The US Constitution created checks and balances by establishing [separation of powers, a bicameral legislature, a process based on rules and justice]. The primary power of the judicial branch over others is to [amend laws, impeach office holders, or decide if an action is constitutional]. A book is 9 inches wide and 13.5 inches tall.What will the area of the front of the book? what does (I) means in a chemical equation How many moles are in 43 grams of lithium (LI)? In class, we have talked a lot about the water cycle and the importance of fresh water to life on our planet. Pretend you are writing a letter to the current governor of Texas, Greg Abbott, and convince him that all Texan's need to conserve water and take care of the water cycle. You can explain all the ways water is vital in your life and the activities you are able to do because of clean water. Add in facts and information you have learned or already knew about the water cycle and water resources. Your goal is to write at least an EIGHT sentence paragraph to convince governor Greg Abbott water is a priority in Texas.PLZZ HELP IT CAN BE SHORT IBUT IT IS DUE IN LESS THAN 10 MINUTS URGENT: Why does an increase in carbon dioxide increase the quantity of hydrogen ions in blood? A.) When carbon dioxide mixes with water, it loses two electrons?B.) When carbon dioxide mixes with blood, it slows the transfers of hydrogen ions.C.) When carbon dioxides dissolves in water, it releases hydroxides.D.) When carbon dioxide is dissolved in water, it forms carbonic acid? Help PLEASEEEE!! I'm taking a test rn and I am failing spanish please help!! They seem really easy for people who know spanish. Please help.....1. ____ pintas las uas. te se2. Javier y yo ____ preparamos. nos se3. Roberto ____ viste. nos se4. Yo ____ bao. me se5. Lola y Rita ____ arreglan. se nos6. Maya ____ acuesta tarde. A. te B. se7. T ____ secas el pelo. te me 5. Why did Napoleon offer ALL of Louisiana to? What price did he offer? what is upwelling?the productivity of an ecosystemwater moving up from the benthic zone when infertile species reproducethe mixing of two biomes Which answer shows 0.00897 written in scientific notation?0.897 x 10-28.97 x 10-38.97 x 10-28.97 x 20 3 what are some common tasks performed by Municipal Clerks? Check all that apply.recording and editing the minutes (notes) of meetingsperforming inspections to make sure restaurants meet standardsplanning the maintenance of documentsissuing public notifications of meetingsdrafting and proposing legislationtraveling to attend conferences in other statesparticipating in administration of elections if you answer this u will get 10, and I will answer one of ur questions ONLY if ur right PLEASE HELP ITS DUE IN A FEW MINUTES