Choose the answer that correctly lists, in chronological order, the events involved in synaptic transmission
a: A nerve impulse reaches the synaptic knob.
b: Neurotransmitter molecules diffuse across the synaptic cleft.
c: A nerve impulse begins in the postsynaptic cell.
d: Neurotransmitter molecules bind to receptors in the postsynaptic cell.
e: A voltage change occurs in the postsynaptic cell.
A. a, c, b, d, e
B. a, b, e, d, c
C. c, b, d, e, a
D. a, b, d, e, c
E. c, a, b, d, e
D
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The end of a long bone is called the ________.
Fill in the blank(s) with the appropriate word(s).
One of the weakest parts of the shoulder is the part that lacks tendons of the rotator cuff. This weak area is the ________ aspect of the shoulder.
A. anterior B. superior C. posterior D. inferior
The heart muscle is said to have automaticity, which means that ________
A) the nerves that innervate the heart cause the heart to beat automatically B) the heart has a built-in automatic nerve C) the heart muscle depolarizes and contracts spontaneously without external stimulation D) the heart muscle beats in a regular rhythm
Which sequence correctly traces the pathway of aqueous humor in the eye?a: Aqueous humor is secreted by epithelial ciliary cells.b: Aqueous humor is released into the posterior chamber.c: Aqueous humor is drained into the scleral venous sinus.d: Aqueous humor washes over the lens and then passes through the pupil into the anterior chamber.
A. a, c, b, d B. b, a, c, d C. d, a, c, b D. a, b, c, d E. a, b, d, c