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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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 end of a long bone is called the ________.
Fill in the blank(s) with the appropriate word(s).
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