Bronchioles differ from bronchi in that they
A) warm air to body temperature.
B) contain only smooth muscle.
C) filter and humidify air.
D) can have alveoli attached to them.
E) are lined by a ciliated epithelium.
D
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The phase at the end of an action potential when the membrane potential becomes more negative than it is at rest is the ________ phase.
A) threshold B) depolarizing C) repolarizing D) hyperpolarizing E) refractory
Given what you now know, what information is most likely to produce the correct answer?
What will be an ideal response?
Organisms that obtain heat primarily from the external environment are called
a. endotherms. b. isotherms. c. exotherms. d. ectotherms. e. allotherms.
Of the following codons, which encodes a normal translational stop?
A) UUU B) AUG C) UAG D) AAA E) AGG