What is the thin barrier (0.2 !m) that allows for the efficient exchange of gases between the lungs and the blood called?
A) endothelial cell
B) type I alveolar cell
C) type II alveolar cell
D) respiratory membrane
E) alveolar macrophage
Answer: D) respiratory membrane
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A common food intoxication is caused by enterotoxin-producing strains of ________.
A. Staphylococcus epidermidis B. Staphylococcus saprophyticus C. Streptococcus agalactiae D. Staphylococcus aureus E. Streptococcus pyogenes
The sinoatrial node controls the heartbeat.
Answer the following statement true (T) or false (F)
Which of the following excretory structures is used by birds?
A. nephridia B. cloaca C. urethra D. flame cells
Which of the following is not a function of ATP within the cell?
a. All of the answer choices are functions of ATP within the cell. b. conduction of nerve impulses c. contraction of muscle cells d. synthesis of macromolecules e. energy currency of the cell