Which brain nucleus serves as the body's "master clock"?
A) caudate nucleus B) basal nucleus
C) suprachiasmatic nucleus D) lentiform nucleus
Answer: C
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An abrasion of the skin results in which of the following?
A. fluid retention by the kidney B. increased melanin production C. portal of entry for microorganisms D. loss of cell regeneration ability E. irreversible damage to the epidermis
How many osmoles are in a solution of 1M NaOH?
A. 1 osm B. 2 osm C. 3 osm D. 4 osm
What structures keep the AV valves from everting under high ventricular pressure?
A. Papillary muscles and chordae tendineae B. Interventricular and interatrial septa C. Annuli fibrosis D. Semilunar valves
Areas of the spleen that contain large aggregations of lymphocytes are known as
A) Peyer's patches. B) adenoids. C) white pulp. D) red pulp. E) lymph nodes.