Which of the descriptions is not descriptive of REM (rapid eye movement) sleep?
A. visible movements of the eyes resembling those of one tracking the movements of objects in space, watching TV, etc.
B. difficulty arousing the sleeper
C. oxygen consumption decreases by comparison to NREM sleep and in an alert wakeful state
D. it represents 20%-25% of a person's "sleeptime"
E. skeletal muscle activity is markedly reduced, except for the extraocular and respiratory muscles
C
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Cancer cells
A) are indistinguishable from normal body cells. B) have a slow mitotic rate. C) may exhibit metastasis. D) do not form neoplasms. E) generally form benign tumors.
Passive immunity is accomplished by transfer of ____ antibodies
a. IgA b. IgE c. IgG d. IgM e. any of the above
What stimulates atrial natriuretic peptide release?
A) renin B) changes in the concentration of sodium in the blood of the atrium C) distension of the atrial wall due to an increase in plasma volume D) changes in the concentration of potassium in the blood of the atrium E) distension of the atrial wall due to an increase in blood pressure
Which bone of the pectoral girdle or upper limb is S-shaped?
A. Scapula B. Radius C. Humerus D. Ulna E. Clavicle