The true statement about muscle tissue is that it's made up of muscle fibers, which are long cells that are capable of contracting and relaxing. There are three types of muscle tissue found in the human body: skeletal, smooth, and cardiac.
Here are some of the characteristics of each:
Skeletal muscle is attached to bones and its contraction makes possible locomotion, facial expressions, posture, and other voluntary movements of the body. Forty percent of your body mass is made up of skeletal muscle.
Cardiac muscle is found in the heart. It is responsible for the rhythmic contraction and relaxation of the heart that pumps blood throughout the body.
Smooth muscle is found in the walls of hollow organs such as the stomach, intestines, and bladder. It is responsible for the movement of food through the digestive tract, urine through the bladder, and blood through the blood vessels.
Muscle tissue has many important functions in the human body. It's responsible for movement, maintaining posture, stabilizing joints, generating heat, and aiding in digestion. Muscle fibers are long and slender, and they are bundled together to form muscles. Muscle fibers contract when they are stimulated by nerves and contraction produces movement.
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Which of the following statements about muscle tissue is true?
A) skeletal muscle and cardiac muscle tissue have no striations
B) smooth muscle tissue is found in the heart
C) the cells of skeletal muscle tissue are long tubular and multinucleated
D) smooth muscle cells are jointed by intercalated disks
Which of the following is NOT true regarding cross-sectional studies? (2 points)
A. Good for generating hypotheses.
B. Not used for diseases that are rare or of short duration.
C. Permit the determination of population characteristics.
D. The temporal relationship between exposure and disease can be determined.
The temporal relationship between exposure and disease can be determined, option D is correct.
Cross-sectional studies are not suitable for determining the temporal relationship between exposure and disease. Cross-sectional studies provide a snapshot of data collected at a specific point in time, capturing information on both exposure and disease prevalence simultaneously. However, they do not follow individuals over time to establish a cause-and-effect relationship. Since cross-sectional studies collect data at a single time point, they cannot determine the sequence of events or whether exposure preceded the disease.
To establish temporal relationships, longitudinal studies are typically employed, where individuals are followed over time to assess exposures and track the development of diseases, allowing for better assessment of causality and temporal associations between exposure and outcome, option D is correct.
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Which of the following statements regarding the motor unit is true?
A) Each motor unit can consist of a different number of muscle fibers
B) All muscle fibers of one particular motor unit are always the same fiber type.
C) A muscle can be composed of a different number of motor units.
D) All of the above.
Different numbers of muscle fibers can make up each motor unit: The size of motor units varies, as may the number of muscle fibers that each motor unit innervates. The correct answer is (D).
Compared to motor units regulating bigger muscles, motor units governing tiny movements, such as those in the muscles of the fingers, contain fewer muscle fibers per motor unit.
One specific motor unit's muscular fibers are always of the same fiber type: The muscle fibers frequently belong to the same fiber type within a single motor unit. This indicates that they share traits like contractile capacities and metabolic abilities. However, different fiber types might make up the various motor units within a muscle.
A muscle can contain various numbers of motor units: Muscles come in a variety of shapes, sizes, and compositions, as well as with varying numbers of motor units. The number of motor units a muscle contains is influenced by things including muscle size, function, and the level of accuracy needed during movement.
Because each of the statements about the motor unit is true, option D) All of the above is the accurate statement.
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The state of flux in modern systematic groupings could best be described as/seen in a variety of conflicting kingdom or _____ structures.
The state of flux in modern systematic groupings can be seen in a variety of conflicting kingdom or domain structures.
The classification of organisms into different taxonomic categories, such as kingdoms or domains, is constantly evolving as new scientific discoveries and advancements are made. The traditional five-kingdom system (Animalia, Plantae, Fungi, Protista, and Monera) has been challenged and modified in light of new genetic and molecular information.
One major development in the field of taxonomy is the adoption of the three-domain system, proposed by Carl Woese in the 1990s. This system categorizes organisms into three domains: Bacteria, Archaea, and Eukarya. This classification is based on the genetic and biochemical differences observed in the ribosomal RNA sequences of these organisms. The three-domain system highlights the fundamental distinction between prokaryotic (Bacteria and Archaea) and eukaryotic (Eukarya) organisms.
However, even within these domains, there is ongoing debate and reorganization at lower taxonomic levels. For example, the classification of certain groups within the domain Eukarya, such as protists, has been challenging due to their vast diversity and complex evolutionary relationships. Protists were traditionally considered a single kingdom, but they are now recognized as a polyphyletic group, comprising multiple lineages that are not closely related.
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When graphing data, what will make it
more precise?
A. using larger units
B. making it cover most of the graph
C. using a bar graph
D. connecting all the points plotted
Answer:
A. using larger units
Explanation:
Graphs can be used to display large amounts of numerical data and to portray the relationships between numerical values of different variables
When graphing data, what will make it more precise would be to ensure that it covers most of the space on the graph sheet. The correct option would, therefore, be B.
Using larger units may result in inaccurate plotting of small variablesNot all data can be represented as a bar graphConnecting all the points plotted has no bearing on the precision of a graphMaking your graph to cover, at least, 2/3 of the graph space will ensure that your plots are visible and lead to a more precise graph.
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How did the animals near orchard park all die
Answer:
Scientists have shown that the ash that killed and eventually buried the animals at the park blew eastward from a huge volcanic eruption in what is now southwestern Idaho.
What happens when the sun emits more energy than normal
Answer: When the Sun emits more amount of energy than normal, "Solar flares and sunspots" occur, increasing temperature of Earth. Explanation: The Earth's temperature is governed by many factors
HOPE THIS HELPS
As the moon's shape appears to get smaller, we say that the moon is _. *
A.swelling
B.waxing
C.waning
D.disappearing
Answer:
waning
Explanation:
i think, don't quote me on that
seniors tend to have joints that creak. what might be the matter
Creaking joints in seniors may be due to age-related degeneration of cartilage, changes in joint fluid, or the development of osteoarthritis.
As individuals age, the cartilage that cushions joints may undergo degenerative changes. Over time, this can lead to a loss of smoothness and elasticity in the joint surfaces, resulting in joint creaking. Additionally, age-related changes in the synovial fluid, which lubricates the joints, can occur.
The fluid may become thinner and less effective in reducing friction between the joint surfaces. Another common cause of joint creaking in seniors is the development of osteoarthritis, a condition characterized by the breakdown of cartilage. Osteoarthritis can lead to joint inflammation, stiffness, and the production of sounds like cracking or creaking during movement.
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Over several generations,a species of insect becomes resistant to a pesticide that farmers commonly use.what type of selection is this an example of,and why
Select one
Artificial selection,because only individuals with the resistant trait survive
The type of selection where a species of insect becomes resistant to a pesticide that farmers commonly use is Natural selection.
What describes naturakl selection?Natural selection is the process by which organisms with traits that are better suited to their environment are more likely to survive and reproduce. In this case, the insects that are resistant to the pesticide are more likely to survive and reproduce, because they are not killed by the pesticide.
This means that the next generation of insects will have more resistant individuals. Over time, this can lead to a population of insects that is completely resistant to the pesticide.
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consider this microscopic image of bacteria. which type of bacteria is shown in the image? bacillus coccus spirillum cholera
Without the actual image, it is not possible to accurately determine the type of bacteria shown. However, I can provide some general characteristics of the bacteria you mentioned to help identify them.
Bacillus refers to rod-shaped bacteria, which appear elongated and cylindrical. These bacteria typically occur singly or in chains. Coccus refers to spherical or round-shaped bacteria. They can occur singly, in pairs (diplococcus), in clusters (staphylococcus), or in chains (streptococcus). Spirillum refers to spiral-shaped bacteria, which appear as curved or helical rods. They have a rigid cell wall and may exhibit a characteristic spiral shape. Cholera is not a specific bacterial shape but refers to a disease caused by the bacterium Vibrio cholerae. Vibrio bacteria are curved rods with a single polar flagellum, giving them a comma-like shape. Without further information or the image itself, it is challenging to definitively determine the type of bacteria shown. Microscopic characteristics such as shape, arrangement, and additional features are crucial in identifying bacterial types accurately.
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Which of the following is NOT an aspect of organisms found in the Plant Kingdom?
Movement
Sexual Reproduction
Multi-Celled
Autotrophic (Makes its own food)
What type of dominance is it when BOTH alleles for a trait are expressed in offspring?
Recessive
Incomplete dominance
Codominant
Complete dominance
Answer:
Codominant
Explanation:
Do the benefits seem to outweigh the risks of genetically modifying about the glittering gold seahorse Explain your rationale.
plz help
Answer:
yes it does
Explanation:
Can someone please help I need for finals to study
1st Page: Include separate in each question next time.
1) Carbon dioxide (CO2) is the greenhouse gas that has been most released into the atmosphere by human activity. Burning of fossil fuels like coal, oil, and natural gas for transportation, electricity generation, and other industrial processes releases large amounts of CO2 into the atmosphere. Deforestation and other land-use changes also contribute to increased CO2 emissions. CO2 is a major contributor to global warming and climate change, as it traps heat in the atmosphere and results in a warming effect on the planet. Other greenhouse gases, such as methane and nitrous oxide, also contribute to climate change, but CO2 is the most significant and has the greatest impact on the Earth's climate system.
2) The concept of the "heat trapping blanket" refers to the natural greenhouse effect that occurs in the Earth's atmosphere. The Earth's atmosphere acts like a blanket that traps some of the heat energy from the Sun that is absorbed by the Earth's surface, keeping the planet warm enough to support life. This is a natural and necessary process that has been occurring for billions of years. The Earth's atmosphere is made up of several gases, including carbon dioxide, methane, and water vapor, that have the ability to trap heat in the atmosphere. These gases are known as greenhouse gases because they act like the glass walls of a greenhouse, allowing sunlight to pass through but trapping the heat that is radiated back from the Earth's surface. activities, such as burning fossil fuels and deforestation, have increased the concentration of greenhouse gases in the atmosphere, particularly carbon dioxide. This has intensified the greenhouse effect, resulting in a warming of the Earth's surface temperatures, known as global warming. The "heat trapping blanket" analogy is often used to describe this process, as the increasing concentration of greenhouse gases in the atmosphere is like adding an extra layer to the blanket, making it thicker and trapping more heat. The consequences of global warming include rising sea levels, more frequent and severe weather events, and changes in the distribution of plant and animal species. In order to reduce the impact of global warming, it is important to reduce greenhouse gas emissions and promote sustainable practices that help to mitigate the effects of climate change.
3) The three "-spheres" that are being affected and changed by greenhouse gases are:
The atmosphere: Greenhouse gases such as carbon dioxide, methane, and nitrous oxide are accumulating in the atmosphere and trapping heat, causing the Earth's average temperature to rise. This is leading to changes in weather patterns, rising sea levels, and more frequent and severe weather events.
The hydrosphere: The increasing temperature of the Earth's atmosphere is causing the oceans to warm, leading to thermal expansion and rising sea levels. The oceans are also becoming more acidic due to the absorption of carbon dioxide from the atmosphere, which is having negative impacts on marine ecosystems.
The biosphere: Changes in temperature and weather patterns are affecting ecosystems and the distribution of plant and animal species. Some species are being forced to migrate to new areas in search of suitable habitats, while others are becoming endangered or extinct. The biosphere is also being impacted by ocean acidification, which can affect the ability of marine organisms to form shells and skeletons.
4) Reducing greenhouse gas emissions and mitigating the effects of climate change is a complex problem that requires a multi-faceted approach. Here are some potential strategies that could be used to address the issue, along with their criteria, constraints, and costs: Renewable energy: Transitioning to renewable energy sources such as solar, wind, and hydropower can reduce greenhouse gas emissions from fossil fuel use. Criteria for this solution could include the ability to generate electricity at scale, cost-effectiveness, and reliability. Constraints include the need for suitable locations for renewable energy infrastructure, limited storage capacity, and the intermittency of some renewable energy sources. Costs can vary depending on the specific technology used and the location of the infrastructure.
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Why is earths interior layered?
If a strand of DNA has the nucleotide sequence: AATGCT, what is the complementary sequence of RNA nucleotides that would be made from it?
Answer:
Explanation:
All the best
How is the ocean affected by the releasing of excess carbon?
Answer:
Explanation:
Because of human-driven increased levels of carbon dioxide in the atmosphere, there is more CO2 dissolving into the ocean. The ocean's average pH is now around 8.1 , which is basic (or alkaline), but as the ocean continues to absorb more CO2, the pH decreases and the ocean becomes more acidic.
Cardiac output is the amount of blood pumped by the heart in one minute. Which of these will increase cardiac output?
Answer: the factors that increase cardiac output include:
--> Nervous stimulation and
--> Hypertrophy of the heart.
Explanation:
Cardiac output can be defined as the quantity of blood pumped into the aorta each minute by the heart. This is also the quantity of blood that flows through the circulation. There are factors that can cause increased cardiac output or that can lead to a hypereffective heart. They are:
--> NERVOUS STIMULATION: The combination of sympathetic stimulation and parasympathetic inhibition does two things to increase the pumping effectiveness or cardiac output of the heart. These include:
• it greatly increase the heart rate from the normal level of 72 beats/mum up to 180 to 200 beats /mom.
• it increases the strength of heart contraction, which is called increased contractility to twice it's normal strength.
--> HYPERTROPHY OF THE HEART: A long term increased workload, but not so much excess load that it damages the heart, causes the heart muscle to increase in mass and contractile strength in the same way that heavy exercise causes skeletal muscles to hypertrophy. This effect of increased muscle mass of the heart, allows the heart to pump much greater than usual amounts of cardiac output.
What does it mean to ‘translate’ something? What is being translated in protein synthesis?
Answer:
Answer:
Translation is the process of translating the sequence of a messenger RNA molecule to a sequence of amino acids during protein synthesis. The genetic code describes the relationship between the sequence of base pairs in a gene and the corresponding amino acid sequence that it encodes.
For a second i thought you meant to translate something to another language lol.
Fruit-bearing trees such as apple trees have seeds that are found within the fruit. How is this considered an adaptation? *
the fruit is appealing to animals who will eat fruit and then disperse the seeds
the fruit protects the seeds from cold weather
the fruit protects the seed from an over-exposure to water
the fruit makes the seeds less appealing
Answer:
DRJYNTRHJ7LY
Explanation:
2. The formation of a new community where another community already exists is known as ______.
A primary succession
B secondary succession
C pioneer community
D pioneer species
Answer:
B secondary succession
Explanation:
is influenza a unicellular organism
Answer:
no viruses are not considered living
Explanation:
Answer:
No
Explanation:
influenza is an infection (viral) caused by the influenza virus.
the influenza virus is a particle (acellular) thus not made up of cells
How is male same-sex eroticism portrayed in 300, Troy, and Alexander? To what extent do these portrayals correspond to the realities of the ancient world? Discuss at least one specific example from each film.
In 300, Troy, and Alexander, male same-sex eroticism is portrayed in different ways, but the extent to which these portrayals correspond to the realities of the ancient world varies.
In 300, the portrayal of male same-sex eroticism is minimal. The film primarily focuses on the battle between the Spartans and the Persians, with limited exploration of personal relationships.
While there are instances of male camaraderie and intimacy among the Spartan warriors, there is no explicit depiction of same-sex eroticism.
In Troy, there is a subtle portrayal of male same-sex desire between Achilles and Patroclus. Although the film does not explicitly depict their relationship as romantic or sexual, there are moments of emotional closeness and affection between them, suggesting a deeper bond.
However, the film does not fully explore the complexities of same-sex relationships in ancient Greece.
In Alexander, the film delves deeper into the exploration of Alexander the Great's relationships, including his close bond with Hephaestion. The film portrays their relationship as intimate and romantic, suggesting a same-sex erotic connection.
However, the extent to which this portrayal aligns with the realities of the ancient world is debatable, as historical records present varying interpretations of the nature of their relationship.
Overall, while these films touch on male same-sex eroticism to some extent, they tend to downplay or romanticize it, often adhering to contemporary sensibilities and audience expectations rather than providing accurate representations of ancient attitudes towards homosexuality.
The realities of same-sex eroticism in the ancient world were diverse and complex, and the films' portrayals may not fully capture this diversity.
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HURRY IT’S TIMED I’LL GIVE YOU BRAINLIEST
Which illustrates the relationship between cooling magma and mineral formation?
A. Darwins theory
B. Theory of relativity
C. Bowen‘s reaction series
D. Newtons principle of physics
Answer: C. Bowen‘s reaction series
Explanation:
please help tephographic map
Answer:
1 weathering 2 erosion 3 deposition
Explanation:
assuming this portrays a mountain the rain starts at the top eroding down the mountain carrying any sediment and then is deposited at the base
With respect to climate change and natural selection acting upon a population of one species of frog in a tropical rain forest, mutations of DNA sequences of the frog genome that are inherited by offspring It is estimated by a wide body of scientists that in recent decades we have begun another mass extinction event on Earth. Amphibians in particular have been in decline, sometimes due to climate change, and they therefore provide a possible early sign of dramatic biodiversity change to come. With respect to climate change and natural selection acting upon a population of one species of frog in a tropical rain forest, mutations of DNA sequences of the frog genome that are inherited by offspring may have no effect at all, be beneficial, or be harmful. will primarily be harmful. will only speed the decline and extinction of the species. could either be beneficial or harmful.
Answer:
be beneficial.
Explanation:
Mutations of DNA sequences of the frog genome that are inherited by offspring will be beneficial for the frog because this mutation in the genetic makeup of frog provides resistance in this new environmental conditions. This mutation occurs due to the exposure of cell's DNA to the environmental factor which gives benefit to the organisms to survive different condition which can't tolerate by their parents so this mutation is beneficial for that offspring of frog.
What kinds of Bacteria helps farmers?
Answer: Nitrogen-fixing
Explanation: Nitrogen-fixing bacteria (shown here in a soybean root) are able to convert nitrogen from the air into a form that plants can use
Which of the following is not included in a bill of sale.
A) A detailed description of the item
B) The make, model, and color of an item
C) A specific set of rights to the buyer
D) Signatures of both parties
8th grade science second page
Answer: Part A. 1. 159.5mm, 3. If they go 16cm per 29 years it would take 90 years to go 50cm 4. probably because the earthworms don’t go below 1 meter deep so rocks don’t go deeper.
Explanation:
La división celular sucede en 2 fases, en primer la lugar la división del ______________ y después la división del __________________ *