Which is not considered to be a change associated with aging in males?
A. Erectile dysfunction
B. Impotence
C. Decreased testosterone levels
D. Prostate enlargement
E. Termination of spermatogenesis
E
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What is the basic difference between simple diffusion and facilitated diffusion across a cell membrane?
A) In simple diffusion, molecules move down the concentration gradient but in facilitated diffusion molecules move up the concentration gradient. B) In facilitated diffusion, molecules only move with the aid of a protein in the membrane. C) Simple diffusion requires molecules to move through special doorways in the cell membrane. D) Simple diffusion is passive but facilitated diffusion is an active process that uses energy.
Bile entering the gallbladder must pass through the __________.
a. common hepatic duct b. duodenal papilla c. hepatopancreatic sphincter d. cystic duct
The two heads of the biceps brachii combine to insert on the __________.
A. radial tuberosity B. olecranon process C. radial notch D. ulnar notch
Which of the following is the site of contact digestion?
A. The gastric pits B. The brush border of the small intestine C. The surface of the gastric mucosa D. The intestinal crypts E. The cytoplasm of the small intestinal cells