What determines the color of the iris?
What will be an ideal response?
The amount of the brown pigment melanin
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Of the muscles listed, the only one not innervated by the pudendal nerve is the
A. external anal sphincter. B. iliococcygeus. C. puborectalis. D. pubococcygeus. E. coccygeus.
The small bones in the mammalian middle ear are called:
A) Malleus, incus, stapes. B) Stapes, ossicle, tectorus. C) Malleus, otolith, statocyst. D) Utricle, saccule, ampulla.
After suffering nerve damage, an accident victim is unable to flex his right thigh, or extend his right leg. The nerve most likely damaged is the
A) common fibular nerve. B) femoral nerve. C) obturator nerve. D) tibial nerve. E) coccygeal plexus.
Hemoglobin
A. gives white blood cells their color. B. transports oxygen in the blood. C. is normally found in both the plasma and erythrocytes. D. catalyzes the reaction that forms carbonic acid. E. is only used once then decomposed.