The auditory ossicles are housed in which cranial bone?
A) sphenoid
B) ethmoid
C) zygomatic
D) temporal
E) lacrimal
D
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An embryonic septum that develops within the bulbus cordis and truncus arteriosus produces what structures?
A. The right and left atria B. The right atrium and right ventricle C. The ascending aorta and pulmonary trunk D. The right and left ventricles E. The left atrium and left ventricle
What is a weak, thin-walled bulging sac in an arterial wall called?
A. An aneurysm B. A hematoma C. An atheroma D. An embolism E. A varicose vein
Why is water involved in most metabolic reactions in the human body?
A. It can absorb and release heat without changing temperature very much. B. It has a high surface tension. C. It can dissolve many chemical compounds. D. Its bonds are nonpolar. E. It is a solute.
Passive transport of water is known as ________.
A. facilitated diffusion B. osmosis C. filtration D. a water pump