Identify the correct sequence of information in a chemical synapse
A.
Postsynaptic membrane; synaptic cleft; presynaptic terminal
B.
Synaptic cleft; presynaptic terminal; postsynaptic membrane
C.
Presynaptic terminal; postsynaptic membrane; synaptic cleft
D.
Presynaptic terminal; synaptic cleft; postsynaptic membrane
D
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Choose the correct statement regarding motor units.
A) Muscle fibers of each motor unit are not mingled with those of other motor units. B) During a sustained contraction, all motor units are activated simultaneously. C) A motor neuron may control only two or three muscle fibers of the eye muscle(s). D) When muscles contract for sustained periods, maximal tension is maintained. E) Most motor neurons control fewer than five muscle fibers.
Long-term adaptations make the body more efficient in responding to an ongoing or repetitive challenge in homeostasis
a. True b. False Indicate whether the statement is true or false
The hydrogen ion concentration or pH of arterial blood is regulated by the combined actions of the ________ and ________.
A) kidneys : buffer systems B) lungs : kidneys C) kidneys : cardiovascular system D) kidneys : lymphatic system E) lungs: buffer systems
The "link" between the subclavian and brachial arteries is the __________.
a. axillary artery b. brachiocephalic artery c. vertebral artery d. cephalic artery