Mr. Smith staggered home after a long night at the local pub. While attempting to navigate the stairs, he passed out cold and lay all night with his right armpit straddling the staircase banister
When he awoke the next morning, he had a severe headache, but what bothered him more was that he had no sensation in his right arm and hand. Explain what caused this symptom in his arm.
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Continuous pressure interrupts blood flow along with oxygen and nutrients to the neuron processes. As a result, impulse transmission is inhibited temporarily.
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The process of keratinization begins in the stratum granulosum
Indicate whether this statement is true or false.
In an arteriole, if the blood vessel radius is 2 units and then vasoconstricted to 1 units, the resistance:
a. the resistance decreases 16 times. b. the resistance increases 16 times. c. flow will be decreased. d. both (a) and (b) above. e. both (b) and (c) above.
Which of the following statements concerning the cardiac cycle is true?
A. Blood enters the right and left atria only during diastole. B. During ventricular systole, the AV valves open. C. The semilunar valves remain closed throughout ventricular systole. D. Most of end-diastolic volume comes from active filling. E. Most ventricular filling occurs before the atria contract.
Why does potassium concentration rise in patients with acidosis? What is this called? What effects does it have?
What will be an ideal response?