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Darlene Perez

Human Physiology - Week 7 - 13

QuestionAnswer
Which membrane receptor acts to directly change ion permeability when stimulated? A. G-protein-coupled receptors B. Metabotropic receptors C. Gated-channel receptor D. Ionotropic receptor C. gated-channel receptor
The magnitude of the action potential peaks when the sodium channels close. True/False True
A synapse can occur only between an axon and: A. another axon B. any of the above C. a cell body D. a dendrite B. any of the above
In a myelinated neuron, the impulse can travel under the myelin between nodes of Ranvier. True/False True
Severe depression can be caused by a deficit in certain brain synapses of: A. acetylcholine B. amines C. amino acids D. neuropeptides B. amines
Which is true of a neuron with a resting potential? A. the cell membrane is permeable to Na+ but impermeable to K+ ions B. the highest concentration of K+ is extracellular C. the sodium pump has moved Na+ to the outside of the plasma membrane C. the sodium pump has moved Na+ to the outside of the plasma membrane
Which of the following is not used by the body as a neurotransmitter? A. nitric oxide B. acetylcholine C. carbon monoxide D. all of the above are used by the body as neurotransmitters D. all of the above are used by the body as neurotransmitters
The set of coordinated commands that control the programmed muscle activity mediated by extrapyramidal pathways is called the A. pyramidal tract B. motor tract C. motor program C. motor program
A reflex consists of either a muscle contraction or a A. muscle stretch B. muscle relaxation C. glandular secretion D. glandular exrection C. glandular secretion
The effect of sympathetic stimulation on the urinary bladder is A. relaxation B. constriction C. dilation D. no effect A. relaxation
Created by: dperez6253
 

 



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