False. The opportunity of a new job or house you have wanted can cause stress as well. Stress is an emotion just like crying over extreme happiness or sadness
Answer: The correct option is D.
The concentration of calcium in the myofibril must decrease.
Explanation:
This is because calcium makes myosin, actin and ATP to interact which actually lead to the contraction of muscle fibre.
Relaxation of muscle fibres occurs when the nerves stop stimulating. The result in the pumping of Calcium into the sarcoplasmic reticulum which then cause a break in the link that connect actin and myosin. Actin and myosin return to their unbound state leading to the relaxation of the muscle .
With the stored food molecules and ATP
Answer:
As we have just seen, cells require a constant supply of energy to generate and maintain the biological order that keeps them alive. This energy is derived from the chemical bond energy in food molecules, which thereby serve as fuel for cells.
Explanation:
Answer:
Does Every Cell in the Human Body Contain the Same DNA? With few exceptions, all cells in a person's body have the same DNA and genes. As cells divide and grow different genes are expressed, resulting in different cell types.
Explanation:
