The negative pressure gradient that contributes to the respiratory cycle ____
a. occurs only during expiration
b. exists in the pleural cavity
c. means that the inside of the lungs has a greater pressure than the pleural sac
d. keeps the lungs separated from the chest wall
e. is known as a pneumothorax
ANSWER: b
You might also like to view...
Enzymes in the body catalyze biochemical reactions and ____
a. are chemically changed at the end of the reaction b. are destroyed at the end of the reaction c. are processed into substrate molecules d. convert substrate molecules into products e. convert products into substrate molecules
Why are model organisms used to test hypotheses?
A) The hypotheses are likely to apply only to the model organism. B) The hypotheses are potentially too dangerous to perform on human subjects. C) Human subjects have already been tested. D) The hypotheses have results that are always applicable to humans.
What happens to the body parts, according to the principle of use and disuse?
a. Body parts grow in proportion to their biogeographic location. b. Body parts grow in proportion to the needs of natural selection. c. Body parts grow in proportion to how much they are used. d. Body parts grow in proportion to how much they are not used.
Which type of T cell improves the immune response?
What will be an ideal response?