If too little carbon dioxide is moving out of the lungs, ____
a. the blood pH will rise
b. oxygen levels will rise
c. bronchioles will relax
d. blood vessels will relax
e. respiratory activity will decrease
ANSWER: c
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Suppose that an equal amount of each polysaccharide was placed in a landfill. Which polysaccharide should last the
longest before it is decomposed?
a. chitin b. amylopectin c. cellulose d. glycogen e. amylose
A patient has a serious respiratory infection. A sputum sample yielded a bacterium that did not have any peptidoglycan. You hypothesize that the identity of this microbe could possibly be ________.
A. Mycobacterium tuberculosis B. Staphylococcus aureus C. Borrelia burgdorferi D. Mycoplasma pneumoniae E. Streptococcus pneumoniae
A cell contains 30% solute, while the external environment contains 10% solute. What kind of solution is this cell sitting in?
a. hypotonic b. isotonic c. hypertonic d. osmotonic
During the process of gas exchange, gases move ____
a. by active transport b. down electrical gradients c. through membrane channels d. by facilitated diffusion e. down partial pressure gradients