Which substance is thought to reduce the perception of pain by inhibiting substance P?
A) endorphin
B) dopamine
C) glutamine
D) histamine
Answer: A) endorphin
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If digestion of a carbohydrate results in equal amounts of glucose and galactose, this carbohydrate is probably
A) sucrose. B) maltose. C) lactose. D) cellulose. E) glycogen.
Which labeled structure in the figure represents the only potential pathway for conducting action potentials from the atria to the ventricles?
a) A b) B c) C d) D e) E
The structure in the fetus that allows the blood to bypass the liver is the:
a. ductus venosus b. ductus arteriosus c. foramen ovale d. both B and C above
Name the three columns of erectile tissue in the penis
A) corpus vaginalis and the paired corpora albuginea B) ischiocavernosus and the paired bulbospongiosus C) corpus spongiosum and the paired corpora cavernosa D) ischial ramus and the paired crura of the penis E) root of the penis, prepuce, and the glans penis