The movement of what ion is reflected in the rising phase of the action potential? Choose the correct option
A) Inward Na+ B) Outward K+ C) Outward Na+ D) Inward K+
Ans: A
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All of these substances are part of the body's own natural blood pressure-regulating system, EXCEPT ________
A) angiotensin I B) renin C) triglycerides D) angiotensin II
What occurs when someone receives a tissue transplant from an unrelated individual?
A. The host's lymphocytes enter the tissues and become suppressed. B. The host's lymphocytes enter the tissues and become activated. C. The host's lymphocytes that react to the tissue graft are deleted in the thymus. D. The donor's lymphocytes suppress the host's lymphocytes, allowing for graft survival. E. The donor's lymphocytes destroy the host's immune system.
Which nuclear medicine procedure uses a radioactive substance that emits positrons?
A) ultrasound B) MRI C) CT scan D) PET scan
Which of the following should be avoided before meditating?
A. Coffee B. Cola C. Cigarettes D. All of these