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Amy Gowan SCI221 #2

Physiology 7-13

QuestionAnswer
Which of the following is true of spatial summation? Neurotransmitters released simultaneously from several presynaptic knobs converge on one postsynaptic neuron.
The only ion(s) that can diffuse across a neuron’s membrane when the neuron is at rest is (are): potassium
How does a dually innervated autonomic effector differ from a singly innervated autonomic effector? A dually innervated effector receives input from both sympathetic and parasympathetic pathways. A singly innervated autonomic effector receives input from only the sympathetic division.
Most effectors of the autonomic nervous system are dually innervated by sympathetic and parasympathetic neurons. True
The sequence of auditory ossicles in the middle ear starting at the tympanic membrane and ending at the oval window is: malleus, incus, and stapes.
The two-point discrimination test can be used to measure: the sensitivity of the skin in various parts of the body.
Starling’s law of the heart states that, within limits, the longer, or more stretched, the heart fibers are at the beginning of the contraction, the stronger the contraction.
A glycoprotein hormone that is secreted to increase oxygen concentration in the tissues is erythropoietin
The presentation of an antigen by an antigen-presenting cell activates the T cell. The cell then divides repeatedly to form a clone of identical sensitized T cells that form effector T cells and memory cells.
The internal environment of the human body is protected by the _____, which is(are) referred to as the first line of defense. skin
Created by: amygowan
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