This muscle depresses and adducts the eye.
a. inferior rectus
b. inferior oblique
c. lateral rectus
d. superior oblique
b. inferior oblique
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Your heart seems to "pound" after you hear a sudden, loud noise. This increased contractility is:
A. because you were startled. B. because when a gasp of surprise is emitted, the Frank-Starling law of the heart is evident. C. due to norepinephrine causing threshold to be reached more quickly. D. because acetylcholine release is inhibited.
When acetylcholine binds to receptors at the motor end plate, the sarcolemma becomes
A) more permeable to sodium ions. B) less permeable to sodium ions. C) more permeable to calcium ions. D) less permeable to potassium ions. E) less permeable to potassium and sodium ions.
Which part of the sperm cell has mitochondria?
A. Tail B. Head C. Midpiece D. None of these are correct.
Which of the following events can be heard most easily with a stethoscope?
What will be an ideal response?