Place the following events that occur at the vertebrate neuromuscular junction in the correct order.
I-Depolarization of the muscle fiber membrane.
II-Generation of an action potential in the neuron.
III-Stimulation of Ca2+ entry into the neuron.
IV-Release of acetylcholine into the synapse.
A. I, II, III, IV
B. III, II, IV, I
C. I, III, IV, II
D. IV, II,III, I
E. II, III, IV, I
E. II, III, IV, I
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Louis Pasteur's experiment had a good design because _____
A) simple equipment was used B) a major question, spontaneous generation, was tested C) the possible outcomes led to distinct, unambiguous conclusions D) the experiment was a success
During exercise, the blood returning to a person's heart contains hemoglobin that is about ______ saturated.
A. 3% B. 22% C. 35% D. 75% E. 97%
________ is the procedure in which a harmless form of an antigen from a pathogen is introduced into the body in order to stimulate an immune response to that antigen
Fill in the blank(s) with correct word
In humans, depth perception is possible because
A) the two eyes see identical images. B) we have two eyes on the sides of our heads. C) the two eyes have overlapping visual fields. D) each of the two eyes "sees" an entirely different image. E) the two eyes are necessary for any vision to occur.