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Assignment 2

Human Physiology

QuestionAnswer
Severe depression can be caused by a deficit in certain brain synapses of: amines
Which of the following is true of spatial summation? Neurotransmitters released simultaneously from several presynaptic knobs converge on one postsynaptic neuron.
Stimulus-gated channels open in response to: sensory stimuli.
A synapse consists of: a synaptic knob, a synaptic cleft, the plasma membrane of a postsynaptic neuron.
Which is true of an action potential? The outside of the plasma membrane is negatively charged, and the inside is positively charged.
Which of the following is not true of the knee jerk reflex? It is a flexor reflex.
Once inside the sympathetic chain ganglion, the preganglionic fiber may: synapse with a sympathetic postganglionic neuron, send ascending and/or descending branches through the sympathetic trunk to synapse with postganglionic neurons in other chain ganglia, pass through one or more ganglia without synapsing.
Which step of deglutition is under voluntary control? Oral stage
The physiological mechanism that dissolves clots is known as fibrinolysis.
The heart begins beating in the fetus at about what stage of development? After about 4 weeks
Inhibition of sympathetic vasoconstrictor impulses is considered a major mechanism of vasodilation
The term blood type refers to the type of blood cell antigen
Created by: bonn907
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