The incus, malleus, and stapes of the middle ear
A. serve to keep the pressure on the two sides of the tympanic membrane equal.
B. are part of the vestibular apparatus.
C. are in direct contact with both the tympanic membrane and the round window.
D. serve to amplify the pressure of sound vibrations from the air in the outer ear to the fluid in the inner ear.
E. are found inside the cochlear duct.
D
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A depolarizing graded potential
a) makes the membrane more polarized. b) makes the membrane less polarized. c) is considered a type of action potential. d) is the last part of an action potential. e) is seen when the cell approaches threshold.
What are the most abundant agranulocytes?
A. Macrophages B. Eosinophils C. Monocytes D. Lymphocytes E. Neutrophils
A change in a membrane potential from -70 mV to -90mV is an example of
a. depolarization. b. hyperpolarization. c. polarization. d. repolarization. e. zero potential.
Which vessels transport blood to the right and left lungs?
A. aorta B. right atrium C. pulmonary trunk D. pulmonary arteries E. pulmonary veins