Why is epinephrine injected as a treatment for the respiratory signs and symptoms of anaphylaxis?
What will be an ideal response
Epinephrine enhances sympathetic activity to dilate airways and decrease airway resistance, which had been elevated by the effects of histamine on the bronchioles. It also raises blood pressure, which enhances oxygen delivery to tissues by increasing flow.
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Skeletal and cardiac muscle are both types of striated muscle. You have been given one type of each sample, but the identifying labels have come off
You know that these muscles have some similarities and some differences in terms of their rate of depolarization, rate of repolarization, and length of action potential. Which of these features would not be useful in identifying the two types of muscle? Which of these features will you use to correctly label the samples? Explain what you would expect to see for skeletal and cardiac muscles for each feature that you use. What will be an ideal response?
What are the sounds of Korotkoff?
What will be an ideal response
In a condition called incontinentia pigmenti, the skin has deep dark splotches, due to melanin that seeps down into the dermis. Normally, melanin is confined to the
A. papillae. B. epidermis. C. basement membrane. D. hair.
Which of the following would lead to relaxation of the precapillary sphincter?
A. Decreased tissue metabolism B. Decreased lactate production by cells in the capillary bed C. Decreased CO2 concentration in the capillary bed D. Decreased nitric acid levels E. Decreased O2 levels in tissue cells served by the capillary