Answer: Maintaining homeostasis: Insulin controls the concentration of sugar in the blood
Providing structure: Collagen makes skin strong yet flexible
Regulating chemical reactions: Pepsin works in the stomach to speed up the breakdown of food.
Fighting disease: IgA prevents the buildup of viruses and bacteria in the gut .
Answer:
A reflex action is the body's rapid, involuntary response to external stimuli, often used in order to protect it from immediate harm. First, a receptor detects a stimulus, such as a heat source which could burn the skin. A nerve impulse is then passed along the sensory neurone from the receptor to the central nervous system (the spinal cord). The impulse is transferred via a synapse (a gap between two neurones) to a relay neurone within the cord, and then on to a motor neurone via a second synapse. The impulse travels along the motor neurone to an effector (such as a muscle or gland) which brings about the desired response i.e a muscle moving a body part away from the heat source in the burning example .
Explanation:
The prefix "poly-" means "more than one" and the suffix "-spermy" is clearly related to sperm. Accordingly, polyspermy is when more than one sperm fertilizes an egg, something that organisms try to avoid.
To avoid this extra fertilization, specific organisms can use "electrical polyspermy blocks" (the fast process), which changes the negative electrical charge of the egg to positive, thus repelling the also positively charged sperm. The slower prevention process is when an organism undergoes a secretion reaction, or a cortisol reaction, which contributes to envelopping the egg by changing its membrane.
Answer:
B
Step By Step explanation:
Somatic cells are produced through the cell division process of mitosis.
