There are two kinds of digestion: mechanical and chemical. Mechanical digestion involves physically breaking the food into smaller pieces. Mechanical digestion begins in the mouth as the food is chewed. Chemical digestion involves breaking down the food into simpler nutrients that can be used by the cells.
Answer: Progesterone
Explanation: By stopping ovulation , that is, the release of the egg from the ovaries, pregnancy is prevented.
This is because there won't be any egg available for the sperm to fertilise.
It should be noted that this process mimics the body's natural response to pregnancy.
Answer:
D. Hyperventilation
Explanation:
Hyperventilation is a condition in which you start to breathe very fast. Healthy breathing occurs with a healthy balance between breathing in oxygen and breathing out carbon dioxide. You upset this balance when you hyperventilate by exhaling more than you inhale.
That would be correct. Second hand smoke is more dangerous than smoke inhaled.
