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Amy Gowan SCI221 #2
Physiology 7-13
Question | Answer |
---|---|
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 |