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Physiology Set 2

Weeks 6-12

QuestionAnswer
The shoulder joint is an example of a _____ joint. multiaxial freely movable ball and socket
The first event to occur in muscle relaxation is that: the sarcoplasmic reticulum begins actively pumping calcium back into its sacs.
Which membrane receptor acts to directly change ion permeability when stimulated? Gated-channel receptor
The magnitude of the action potential peaks when the sodium channels close. True or False? True
In a myelinated neuron, the impulse can travel under the myelin between nodes of Ranvier. True or False True
Norepinephrine is liberated at: most sympathetic postganglionic nerve endings.
Which hormone produced by the adrenal glands is responsible for mobilization of energy stores? Cortisol
The four structures that compose the conduction system of the heart are the SA node, AV node, AV bundle, and Purkinje fibers.
During pregnancy, what happens to the oxygenated blood returned from the placenta via the umbilical vein? It flows into the inferior vena cava.
The chemoreceptors in the carotid bodies are particularly sensitive to: hypercapnia.
Erythrocytes begin their maturation sequence in red bone marrow from nucleated cells known as: hematopoietic stem cells.
Recognition of antigens by antibodies occurs when an antigen’s epitopes fit into and bind to an antigen molecule’s antigen-binding site.
External respiration can be defined as: the exchange of gases between the lung and the blood capillaries in the lung and pulmonary ventilation.
Created by: angi0324
 

 



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