True: because it acts as a semi permeable membrane.
Answer:
The nervous system is stimulated from the environment, through sensory receptors. A stimulus is any form of energy that can be detected by the body. ... Animals normally only respond to stimuli which they select; they filter out certain stimuli that surround them, and react to others they choose to accept.
<span>The Food Safety Manuel dictates that you scrub your hands for about thirty seconds. Scrubbing refers to rubbing soap over your hands, not the entirety of handwashing. One must then place their hands under running water for a suggested twenty seconds. Dry your hands using a blow dryer or a paper towel. Do not touch the sink handle after scrubbing your hands!</span>
D)all of the above i think
