Which of the following is correctly matched?
A. Sclera - ciliary body
B. Aqueous humor - vitreous chamber
C. Vitreous humor - anterior chamber
D. Retina - canal of Schlemm
E. Iris - sphincter pupillae
Answer: E
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Exposure to ultraviolet light darkens skin by stimulating synthesis of
A) hemoglobin. B) cyanin. C) carotene. D) melanin.
The energy equivalent of O2 is:
a. 4.8 kcal of energy liberated per liter of O2 consumed b. 4.8 kcal of energy liberated per liter of CO2 expired c. 5.8 kcal of energy liberated per liter of O2 consumed d. 5.8 kcal of energy liberated per liter of CO2 expired e. 6.8 kcal of energy liberated per liter of CO2 expired
Which of the following is correctly associated with the medulla oblongata?
A. It is the most superior portion of the brainstem. B. It contains enlargements called cerebral peduncles. C. It gives rise to conscious thoughts. D. It relays sensory information. E. It contains nuclei for regulation of heart rate and blood vessel diameter.
A substance used to calculate plasma clearance must
A. be secreted into the nephron. B. be readily reabsorbed. C. be either a protein or a polysaccharide. D. pass freely through the filtration membrane of the renal corpuscle. E. be produced in the kidney.