What is swimmer's ear?
A. An infection of the middle ear
B. An infection of the outer ear
C. An infection of the inner ear
D. None of these answers are correct
Answer: B
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Dynamic equilibrium receptors that detect information about angular or rotational movements of the head are housed in the ________
A) cochlea B) vestibule C) semicircular canals D) oval window
Which of the following is true about the movement of ions across excitable living membranes?
A) Ions always move actively across membranes through leakage channels. B) Some ions are prevented from moving down their concentration gradients by ATP-driven pumps. C) Sodium gates in the membrane can open in response to electrical potential changes. D) The bulk of the solutions inside a cell are negatively charged.
A molecule referred to as highly soluble is
A) very likely to dissolve in water. B) not very likely to dissolve in water. C) not very likely to dissolve in water and is called aqueous. D) called aqueous. E) very likely to dissolve in water and is called aqueous.
Which of the mutations above would result in the replacement of an amino acid with a nonpolar side chain with a different, but similar, amino acid?
A. mutation I B. mutation II C. mutation III D. None of the above.