The simplest reflex is the:
a. polysynaptic
b. stretch
c. monosynaptic
d. withdrawal
e. both (b) and (c)
E
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Once cells in the SA node reach threshold,
A. nothing happens until the AV node is innervated. B. the heart stops beating. C. an action potential is triggered. D. a heart attack occurs.
How long does the menstrual, or uterine, cycle last on average?
a. 1 week b. 10 days c. 2 weeks d. 3 weeks e. 28 days
The cell body of a neuron does all of the following except
a. release neurotransmitter into the synaptic cleft. b. produce synaptic vesicles containing neurotransmitter that are subsequently transported to the synaptic knob. c. conduct graded potentials to the initial segment. d. receive graded potentials from dendrites.
Which of the following is NOT true of glycolysis?
A) Two molecules of ATP are spent. B) Four molecules of ATP are synthesized. C) Glucose is split into two three-carbon pyruvate molecules. D) Four molecules of NADH are spent.