Impetigo is caused by the bacterium ________.
A. Propionibacterium
B. Luteus
C. Herpes
D. Streptococcus
E. Staphylococcus
Answer: E
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Through what openings of the nose does inhaled air enter the upper respiratory tract?
A) posterior nares B) nasopharynx C) anterior nares D) nasal cavity
Select the incorrect statement about the postreceptor events of hydrophilic hormones
a. Adenyl cyclase forms cAMP. b. cAMP is a secondary messenger. c. Some hydrophilic hormones use calcium ions as a secondary messenger. d. The hydrophilic hormone binds to a cytoplasmic receptor to activate the second messenger system e. cAMP activates protein kinase
Conduction of a nerve impulse would be the fastest in which of the following?
A. A small fiber with multiple Schwann cells B. A large unmyelinated fiber C. A small diameter myelinated fiber D. A large diameter myelinated fiber E. A small unmyelinated fiber
How does oxygen pass through the plasmalemma?
A) through membrane channels B) across the membrane's lipid portion C) always by passive processes D) always by active transport E) both through membrane channels and always by passive processes