_____________ have the thickest tunica media.
a) Small arteries
b) Small veins
c) Large arteries
d) Large veins
e) Capillaries
Answer: c) Large arteries
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Which of the following plays a central role in stimulating the secretion of the hormone gastrin?
A. Distention of the stomach B. The hormone cholecystokinin (CCK) C. Histamine D. An increase in [H+] in the lumen of the stomach E. The hormone secretin
The cells of the nervous system communicate via _____, whereas the cells of the endocrine system communicate via ____.
Fill in the blank(s) with the appropriate word(s).
The shunt between arteriole and venule in a capillary bed is called ________
A) the metarteriole-thoroughfare channel B) the pre-venule channel C) the precapillary thoroughfare D) the terminal arteriole
In which region of the small intestine are most of the nutrients absorbed?
A) Jejunum B) Ileum C) Duodenum D) Colom