Hey there,
Q1 & Q2)
1) Heredity- Genes carry genetic information for cholesterol. So, it can be passed down from your parents.
2) Diet- Cholesterol depends on the food you eat. If you eat food with too much saturated fat, you get a high level of cholesterol.
3) Weight- If you are obese, you are more prone to get cholesterol. Thus, you need to lose weight
4) Exercise- Exercise regularly to maintain a perfect cholesterol level
5) Stress- If you are a student, take breaks in between study timings to keep you less stress or if you are an adult, go for walks and do something that you like the most to calm your brain down.
Q3) Cholesterol causes plague to grow in your hearts. This thick, hard plague will block the arteries and will cause heart attacks and strokes.
Q4) Pros- <span>Helps maintain healthy cholesterol levels, lowers risks of heart attacks and strokes
Cons- C</span><span>ould create too many HDL leaving not enough cholesterol for the body to be healthy.
Hope this helps :))
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Answer:
The Z lines and H- zone shortens during the muscle contraction.
Explanation:
Sarcomere is the area between the two Z lines. The Z- lines are present in the centre of I - band and H - zone is present in the A - band. The actin filaments which are thin filaments present in I- band and contracts, slide over the myosin filament during contraction.
The I - band, H- zones are became shortens as they are thin than the A- band. It is anisotropic band having thick myosin filaments. They are not flexible and remain in its constant shape during the muscle contraction.
After the muscle contraction, the A- band and the H- zone comes to their original shape. In other words, the sarcomere shortens and comes back during muscle contraction, and relaxation.
A I think sorry if I’m wrong
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