PLEASE HELP! What step of mitosis is illustrated in Diagram A of Figure 10-1? Explain what occurs during that step and how you know if this cell is a plant or animal cell.
Answers
Diagram A will illustrates the first stage of mitosis is: Prophase. Prophase is the first stage of mitosis, and it is a crucial step in cell division where several significant events occur.
Prophase in Mitosis:
Prophase is marked by several key events:
Chromatin Condensation: At the beginning of prophase, the genetic material within the cell's nucleus, known as chromatin (a complex of DNA and proteins), starts to condense. The long, thin strands of chromatin become more tightly coiled and compacted, forming visible structures called chromosomes. Each chromosome will consists of two sister chromatids connected by the centromere.
Nuclear Envelope Breakdown: In many eukaryotic cells, including animal cells, the nuclear envelope, which surrounds the nucleus, begins to break down during prophase. This will allows the spindle fibers to access the chromosomes.
Spindle Fiber Formation: Structures called spindle fibers (microtubules) start to assemble within the cell. These fibers extend from the centrosomes, which are specialized regions of the cell that organize the spindle apparatus. The spindle fibers will play a critical role in moving the chromosomes during later stages of mitosis.
Centrosome Movement: In animal cells, the centrosomes (containing the centrioles) move to opposite poles of the cell. The centrosomes serve as organizing centers for the spindle fibers and help guide the movement of chromosomes.
Animal Cell: Animal cells lack a cell wall, chloroplasts, and a large central vacuole. If Diagram A does not show these features and has centrosomes or centrioles, it is more likely an animal cell.
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- Chromosomes condense and become thicker and shorter. They are visible under a microscope
- The nucleolus begins to dissolve
- The centrioles duplicate and move to the opposite sides of the cell (the poles)
- The mitotic spindle forms
This cell belongs to an animal. You can tell this because centrioles are less common in plant cells, unlike animal cells, which all have centrioles. Plant cells also have "fixed" and rather rectangular like shapes, while animal cells are irregular shapes and are usually round.
Hope this helps :)
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Answers
The correct answer is slow twitch.
There are generally two types of skeletal muscle fibers present in the body of humans. These are slow twitch fibers and the fast twitch fibers. The slow twitch fibers in the muscle allow the long endurance responses to the muscles, on the other hand, the fast twitch fibers generate a fast response in the muscles.
B. ATP to ADP
C. NADH to ATP
D. NADH to NAD+
Answers
When no oxygen is present, anaerobic respiration occurs.It is the only way to produce ATP in this condition.NAD+ is necessary because it is converted into NADH and at the same time ADP is converted to ATP in the reaction of pyruvate synthesis from glucose.Therefore, NADH must be converted to NAD+ in order to have NAD+ always present in the cell.
Answers
Answer:
C is correct hope u get a good grade:)
Explanation:
A) blood vessel diameter
B) receptors in the aorta
C) vasomotor center
D) blood pressure
Answers
Answer:
Answer is D. Blood pressure.
Explanation:
Blood pressure is the pressure of the blood within the arteries, produced by the contraction of the heart muscle.
Answer:
In an unfortunate accident, a young man is struck in the leg by a bullet that tears through an artery just above his right knee. The subsequent blood loss leads to a rapid drop in blood pressure. Receptors in the aorta monitor blood pressure and send signals to the vasomotor center of the brain. In this case, the vasomotor center will increase its stimulation of smooth muscle in the blood vessels, which will cause them to constrict. This constriction leads to an increase in blood pressure.
What represents the effector in this feedback system? receptors in the aorta
Explanation:
Answers
Answer: false
Explanation:
Final answer:
The statement in the question is false. In active progressive muscle relaxation, the muscles are not contracted to approximately 100% maximum contractions. The goal is to contract the muscles to a moderate level, around 40-60% of maximum contraction, and then release the tension.
Explanation:
Active Progressive Muscle Relaxation (APMR) is a technique used to reduce muscle tension and promote relaxation. It involves systematically tensing and then relaxing different muscle groups in the body. The purpose of APMR is to increase awareness of muscle tension and learn to release it.
Contrary to the statement in the question, in APMR, the muscles are not contracted to approximately 100% maximum contractions. The goal is to contract the muscles to a moderate level, around 40-60% of maximum contraction, and then release the tension. This process is repeated for different muscle groups throughout the body.
By intentionally contracting and then relaxing the muscles, individuals practicing APMR can become more aware of muscle tension and learn to release it, leading to a sense of relaxation and reduced overall muscle tension.
Learn more about active progressive muscle relaxation here:
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b.Scientists should not get involved in decisions that affect modern society.
c. Scientists cannot provide accurate information on environmental issues such as global warming.
d. Scientists provide sound scientific data to help society make informed decisions.