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Kalona Banyard

Physiology SET2

QuestionAnswer
Which chemicals allow neurons to communicate with one another? neurotransmitters
In a myelinated neuron, the impulse can travel under the myelin between nodes of Ranvier. True
In depolarization the membrane potential moves toward zero, whereas in hyperpolarization the membrane potential moves away from zero. True
The mechanisms that produce and maintain the resting membrane potential do so by producing a slight excess of positive ions on the outer surface of the plasma membrane.
Each skin surface area supplied by sensory fibers of a given spinal nerve is a dermatome.
The two main types of adrenergic receptors are alpha and beta.
The effect of sympathetic stimulation on the urinary bladder is relaxation.
The type of cells that secrete ACTH are: corticotrophs.
In comparison with the nervous system, the regulatory effects of the endocrine system are: slow to appear but long-lasting.
The last step in the nonsteroid hormone mechanism of action is: protein kinases activate other enzymes.
The localized pressure gradient needed to maintain blood flow in a tissue is called perfusion pressure.
What is the functional significance of large areas of cardiac muscle being electrically coupled to form a single functional syncytium? Because they form a syncytium, muscle cells can pass an action potential along a large area of the heart wall, stimulating contraction in each muscle fiber of the syncytium.
Created by: koko83
 

 



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