Answer: The calcium ion binds to troponin, and this slides the tropomyosin rods away from the binding sites.
Explanation:
Contraction and relaxation of muscle cells brings about movements of the body. The contractile myofilament called sarcomeres are bounded at each end by a dense stripe called the Z - line, to which the myosin fibres are attached, and lying in the middle of the sarcomere are the actin filaments, overlapping with the myosin.
When action potential spreads from the nerve along the sarcolemma (muscle cell membrane), it penetrates deep into the muscle cell through the sarcoplasm (cytoplasm of muscle cell), and releases CALCIUM from the intracellular stores.CALCIUM triggers the binding of myosin to the actin filament next to it forming CROSS BRIDGES.
For this to occur, ACTIN BINDING SITE has to be made available. TROPOMYOSIN is a protein that winds around the chains of the actin filament and covers the myosin-binding sites to prevent actin from binding to myosin. The first step in the process of contraction is for calcium ions to bind to troponin so that tropomyosin can slide away from the binding sites on the actin strands.
the combination of a heart arteries and veins and capillaries is____
Answer:
A (an organ system)
Explanation:
true or false:
Fish are considered carbon-based organism
Answer:
Its how you see it.
Explanation:
1.Life on Earth is based on carbon, likely because each carbon atom can form bonds with up to four other atoms simultaneously. This quality makes carbon well-suited to form the long chains of molecules that serve as the basis for life as we know it, such as proteins and DNA.
2.All life on earth can be thought of as "carbon-based." Just be careful about turning this around backwards. It is true that all living things contain carbon compounds... but the opposite is not true. Just because a certain material is referred to as organic does not mean it is or ever was alive.
How can the arrangement of atoms help explain how the white phosphorus and red phosphorus can both be pure phosphorus substances?
Answer:Phosphorus is a chemical element with symbol P and atomic number 15. A multivalent nonmetal of the nitrogen group, phosphorus as a mineral is almost always present in its maximally oxidized state, as inorganic phosphate.
Explanation:
Chemical element phosphorus has the atomic number 15 and the letter P in its symbol. Phosphorus, a multivalent nonmetal belonging to the nitrogen group, is generally always found in the form of inorganic phosphate, which is phosphorus in its maximally oxidized state.
What is phosphorus?The mineral phosphorus, which is also available as a supplement, is naturally present in many foods. It serves the body in a multitude of capacities. It is a crucial component of cell membranes, bone, and teeth. It maintains a healthy range of blood pH and aids in the activation of enzymes.
All tissues and cells must have phosphorus for growth, maintenance, and repair as well as for the creation of DNA and RNA, the genetic building blocks. The balance and usage of other vitamins and minerals, including vitamin D, iodine, magnesium, and zinc, depend on phosphorus as well.
Thus, Chemical element phosphorus has the atomic number 15.
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Which situation is a result of crossing-over during meiosis?
A
Genes are duplicated exactly, ensuring that offspring will be
identical to the parents.
B
Chromatids thicken and align themselves, helping to ensure
genetic continuity.
с
Genes are rearranged, increasing the variability of offspring.
D
Chromatids fail to sort independently, creating abnormal
chromosome numbers.
Answer:
C
Explanation: Genes are rearranged due to crossing over and offspring can vary in traits and appearance
Which individual's reasoning do you agree with more and why?
Answer:
Your question doesn't make sense. Who is the individual in question?
Explanation:
Which of the following is NOT an external structure of insects?
Head
Larva
Thorax
Abdomen
The health department is responsible to make sure there are written directions for critical control point procedures.
True
False
Answer:
I think it's true...
Explanation:
Answer:
True
Explanation:
edge2021
Chloroplasts contain chlorophyll and carotenoids. Chlorophyll directly absorbs light for use in photosynthesis.
Carotenoids absorb light and transfer the energy from light to chlorophyll. The efficiency of photosynthesis varies with
the wavelengths of the light that illuminates the chloroplasts. In an experiment to study the relationship between the
incoming light wavelengths and the chemical reactions of photosynthesis using a species of green algae, a researcher
labeled the COt2 supply to the algae with 14C, and the H20 with 180.
Which of the following results is expected?
O More 14C is found in the algae when it is illuminated by green light than when it is illuminated by blue-violet and red
light.
O More 180 is found in the algae when it is illuminated by green light than when it is illuminated by blue-violet and red
light
O More 14C is found in the algae when it is illuminated by blue-violet and red light than when it is illuminated by green
light.
O More 180 is found in the algae when it is illuminated by blue-violet and red light than when it is illuminated by green
light
Mark this and return
Save and Exit
Next
Submit
Answer:
D
Explanation:
Correct me if I'm wrong
Roundworms
Type of skeleton (ENdoskeleton, EXoskeleton, or None)
Type of appendages (Jointed, Not Jointed, or Absent)
Segmentation (Present or Absent)
Type of symmetry (Radial, Bilateral, or None)
Answer:
Think about it. Worms move with MUSCLES. So the first answer is None.
The appendage of a roundworm is not present.
How do you think worms turn and move? They are segmented. The symmetry of a worm is Bilateral.
Explanation:
I'm doing the assignment myself. Look up the answers and use common logic.
The diagram below shows the water cycle
What process is shown at point A
What process is shown at point B
What process is shown at point C
What process is shown at point A - precipitation
What process is shown at point B - condensation
What process is shown at point C - evaporation
Which type of energy causes the biggest concerns about its impact on the landscape?
Answer:
wind energy
Explanation:
The use of wind energy, like any other human action, inevitably affects the environment, and its negative effects are felt in the soil, flora and fauna of the place where the wind farms are installed.
Journal
1. The following are the functions of the skeletal system, except
a. It gives shape to the body
b. It serves as the framework of the body.
c. It protects the internal organ of the body.
d. It circulates oxygen and removes carbon dioxide.
2. Why is bone marrow important to the body?
a. It stores much fat.
b. It makes the bone strong.
c. It produces red blood cell.
d. It produces new bone cell.
Answer:
1.
Answer: D
2.
Answer: A,C,D
plz help me i beg of you!?
Answer:
abiotic factors
if something is burned a reaction has occurred
Answer:
true
Explanation:
When the reactants are heated, the average kinetic energy of the molecules increases. This means that more molecules are moving faster and hitting each other with more energy.
HOPE IT HELPS
Answer:
Combustion reaction
FIND THE INDEPENDENT & DEPENDENT VARIABLE!
- the amount of iron in blood depends on the amount of red meat a person eats.
Answer:
The answer is:
Independent: red meat eaten by a person
Dependent: iron in the blood
Explanation:
A dependent variable has to depend on something else, so in order for a dependent variable to exist or happen, there has to be the independent variable. The independent variable is something that does not need anything else to happen for it to take place. It s independent. Such as, a mother cannot have a child without sperm. The mother have a child is dependent, where the sperm is independent.
which of the following statements describes the role water plays in a rain storm
Answer: D. All of the above.
Explanation:
Question 2
10 pts
Identify which part of the scientific method the statement below
represents.
I wonder if 12-4-8 fertilizer or 8-8-10 fertilizer is best for growing
soybeans?
question
data collection
hypothesis
results
Answer:
question
Explanation:
The scientific method is a series of step-wise processes that aims at solving a scientific problem. These steps are as follows:
- Asking a question/making an observation
- formulating an hypothesis
- Testing the hypothesis (experiment)
- Analysis of result
- Conclusion
According to this question, a statement is made as follows: '' I wonder if 12-4-8 fertilizer or 8-8-10 fertilizer is best for growing soybeans"?. This illustrates a question asking whether one type of fertilizer or the other is best for growing soybean plants. Hence, this statement made is a QUESTION.
Cells are open systems that exchange matter and energy with their surroundings. Which of the following best explains
why plant cells require sunlight to make organic compounds, according to Gibbs's theory of free energy?
O The photosynthetic reaction releases free energy to the surroundings.
O The photosynthetic reaction's free energy is in equilibrium.
The reactants of photosynthesis have less free energy than the products,
The change in free energy (AG) of the photosynthetic system is less than zero.
Answer:
I'm not sure if this is correct but I think it's C
Answer:
C ( I think)
Explanation:
If a chemical reaction requires an energy input rather than releasing energy, then the ∆G for that reaction will be a positive value. In this case, the products have more free energy than the reactants. Thus, we can think of the reactions’ products as energy-storing molecules. We call these chemical reactions endergonic reactions, and they are non-spontaneous. An endergonic reaction will not take place on its own without adding free energy.
what amendment to the us constitution had the police violated
Answer: Fourth Amendment
Explanation:
Did you mean: what amendment to the us constitution has the police violated
Fourth Amendment.
7. Before entering Mitosis what most important feature happens
Answer:
Interphase
Explanation:
This happens before mitosis. This is when cells grow and copy DNA.
Hope this helps!
Also I like your pfp!
Select all that apply. Efforts to stop the plague included: flagellants atoning for sins persecuting others governments quarantining all those who fell ill shutting down trade praying
Answer:
so its the first one, the third one, the last two:)
Explanation:
Efforts to stop the plague included:
Flagellants atoning for sinsGovernments quarantining all those who fell illShutting down tradePrayingWhat is a plague?A plague is a highly infectious and often fatal disease caused by the bacterium Yersinia pestis. The most infamous outbreak of the plague occurred in the 14th century in Europe, killing an estimated 25 million people, or one-third of the population. The disease is typically spread through the bite of an infected flea, although it can also be transmitted through contact with infected animals or humans.
There are three forms of the plague: bubonic, septicemic, and pneumonic. Bubonic plague is the most common form and causes swollen lymph nodes, fever, chills, and fatigue. Septicemic plague affects the bloodstream and can cause fever, chills, abdominal pain, and vomiting. Pneumonic plague affects the lungs and can cause fever, cough, chest pain, and difficulty breathing.
Today, the plague is rare but still exists in some parts of the world, including Africa and Asia. Early diagnosis and treatment with antibiotics are essential for successful treatment of the disease.
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An investigator wishes to use animals in an experiment that involves category B, C, and D activities performed on the same animal. How should the animal be categorized
Answer:
Category D
Explanation:
In the USA, the Federal Animal Welfare Regulations require that research laboratories report animal use according to the species as well as the number of individuals subject to experimentation procedures. Moreover, animal use for research/teaching purposes is also reported according to the classification by pain and distress categories. Basically, this classification has four categories (B,C, D and E) in increasing order according to the pain level suffered by research animals. Animals within Category D include those subjected to potentially painful or stressful procedures. In consequence, in this category, it is imperative the utilization of proper anesthetics and/or analgesics in order to diminish the pain and suffering of these animals at the lower level possible.
Shenya Jones, a 34-year-old female, arrives at the office with a swelling and a red pustule on her face. She states the problem started two days ago as a small pimple near her nose. It became irritated then became extremely swollen and painful overnight. This morning there was yellow drainage noted at the site and the swelling has increased. The area of drainage is approximately 1 cm in diameter. The upper lip, side of the face, and nose are all swollen. She rates the pain in her face as a 7 out of 10. The physician thinks the condition may be impetigo or methicillin-resistant Staphylococcus aureus (MRSA), a type of skin infection that is resistant to the common antibiotics used to treat it. A wound culture is obtained.
1. Considering the structures of the skin, what most likely was the cause of the original pimple on this patient's skin?
2. How could Shenya have prevented this skin infection?
Can someone help me please i will pay i have to do this by 12am today no later than that
If a stream with a horizontal distance of 5 km begins at an elevation 200 m
higher than where it ends, what is its stream gradient?
What happens if you inject concentrated salt water into the body as a form of torture?
Help me :(( please. It’s due soon
Answer:
I would guess B or C
Explanation:
I hope this helps
Explain the difference between how light falls on the Earth near the Equator or the Poles
Answer:
Explanation:
The normal amount of solar radiation reduces from the Equator to the poles. This is because the low latitudes (near the Equator deliver relatively large amounts of radiation all year, and at high latitudes (near the poles), the more slanting angle of the Sun’s rays together with long periods of darkness in the winter, result in a low amount of received radiation.
What boundary is present at the Philippine plate and the Eurasian plate?
A convergent boundary resulting in earthquakes and volcanic activity
B transform boundary resulting in fault lines and shallow earthquakes
C divergent boundary resulting in mid-ocean ridge and creation of new sea floor
D convergent boundary resulting in mid-ocean ridge and widening of ocean basic
Answer:
D
Explanation:
1. What is the most important mutation that led to human life?
Answer:The ultimate source of all genetic variation is mutation. Mutation is important as the first step of evolution because it creates a new DNA sequence for a particular gene, creating a new allele. Recombination also can create a new DNA sequence (a new allele) for a specific gene through intragenic recombination.
Explanation:
does the sand at night have less kinetic energy than the sand on a sunny day?