What is a ring block and where is it used?
What will be an ideal response?
A ring block is the injection of local anesthetic completely around the base of an appendage or protuberance to anesthetize or numb it.
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Explain the roles of mucus and cilia in the respiratory system
What will be an ideal response?
The juxtaglomerular apparatus
a. secretes renin in response to sodium depletion or plasma volume reduction. b. is a thickened region of specialized cells at a point where the distal tubule comes into intimate contact with the afferent and efferent arterioles of the same nephron. c. is where reabsorption of sodium occurs. d. both (a) and (b) above. e. all of these answers.
In hyperpolarization
A. K+ ions tend to diffuse out of the cell. B. the plasma membrane's permeability to K+ decreases. C. the resting membrane potential moves closer to zero. D. Na+ ions enter the cell in large numbers. E. the resting membrane potential becomes more positive.
Which of the following represents the body functioning at peak performance due to elevated hormone levels?
A) alarm phase B) resistance phase C) exhaustion phase D) recovery phase