Which hormone is secreted by the beta cells of the pancreas?
A. Insulin
B. Glucagon
C. Somatostatin
D. Pancreatic polypeptide
E. Pancreatic lipase
A
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Which of the following associations pertaining to the dural venous sinuses is incorrect?
A) arachnoid granulations—calcifications of arachnoid mater within the sinuses associated with arteriosclerosis B) confluence of the sinuses—near internal occipital protuberance C) inferior sagittal sinus—located within the falx cerebri D) sigmoid sinus—continues inferiorly as internal jugular vein E) occipital sinus—metastases via internal vertebral venous plexuses
____________________ refers to the synthesis of larger organic molecules from smaller organic molecules
Fill in the blank(s) with correct word
The relative refractory period occurs after the action potential is complete because of the
a. lingering inactivation of the voltage-gated Na+ channels. b. slowness of the voltage-gated channels. c. the sodium-potassium pump. d. both (a) and (b). e. both (b) and (c).
Aldosterone secretion may be stimulated by
A. ADH. B. elevated potassium levels. C. excess water intake. D. elevated sodium levels. E. low potassium levels.