Drinking a fluid that is hypertonic, like seawater, is likely to do which?
A. The blood will absorb all of the salt, making you thirstier than before.
B. The seawater will draw fluid out of the body, making you thirstier than before.
C. Red blood cells will take on water, making them burst.
D. Nothing; we normally have a lot of salt in our blood.
Answer: B
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Most recipients of cholecystectomies have difficulty digesting fatty foods after the procedure. This is due to the lack of emulsification of lipids during the process of digestion, which makes it harder for lipase to access and break down fats. This means that ________ are not being efficiently released into the small intestine during digestion.
Fill in the blank(s) with the appropriate word(s).
This chemical produced in the retina is important for the light-dark cycle of circadian rhythms:
a. melatonin b. melanocortin c. melanopsin d. melanin e. none of the above
The heart's pacemaker is the ________.
atrioventricular bundle Purkinje fibers atrioventricular node sinoatrial node
In this illustration of the inner ear, what feature does the number 9 indicate?
A. Perilymph B. Endolymph C. Apex of cochlea D. Membranous labyrinth E. Spiral organ