During ____, the three germ layers rearrange to produce tissues and organs
a. organogenesis
b. fertilization
c. parturition
d. gastrulation
e. cleavage
ANSWER: a
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The most important function of the globin (protein) portion of a hemoglobin molecule is to
a. directly bind oxygen. b. promote binding of oxygen to the heme group. c. allow release of oxygen from the heme group. d. facilitate the reaction of CO2 and H2O. e. cause constriction of the capillaries.
Which of the following is a difference between frogs and salamanders?
a. frogs have cloacas; salamanders do not b. salamander larvae are tetrapods; frog larvae are not c. salamanders have scales; frogs do not d. frogs reproduce in water; salamanders only sometimes reproduce in water e. more than one of these is a difference between frogs and salamanders
The secondary immune response ____
a. is slower and weaker than the primary response b. is dependent upon effector cells c. is dependent upon memory cells d. responds only one time to an antigen challenge e. is a major component of the innate immune response
Mycoplasma pneumoniae causes respiratory disease by
A. infecting and killing alveolar macrophages. B. triggering inflammatory mediator release. C. attaching to and ultimately killing the ciliated epithelial cells of the trachea. D. paralyzing the respiratory muscles. E. killing the epithelial cells of the alveoli.