Central chemoreceptors detect a decrease in pH in interstitial fluids in the brain. What is the response of the medulla to maintain delivery of oxygen to cells?
A) A feedback loop is initiated that indirectly increases parasympathetic activity which results in vasodilation and a decrease in blood pressure.
B) A feedback loop is initiated that indirectly decreases sympathetic activity which results in vasodilation and a decrease in blood pressure.
C) A feedback loop is initiated that indirectly increases parasympathetic activity which results in vasoconstriction and a rise in blood pressure.
D) A feedback loop is initiated that indirectly increases sympathetic activity which results in vasoconstriction and a rise in blood pressure.
Answer: D
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Olfactory receptor cells are modified bipolar neurons that bear olfactory hairs
Indicate whether this statement is true or false.
The heavy chain of myosin contains 2 important regions: the first acts as ________ to convert energy into movement whereas the second binds to ________.
What will be an ideal response?
Which statement is incorrect?
A. Endocrine glands lack ducts. B. Hormones may have widespread, distant effects on the body. C. Steroid hormones are carried in the blood by transport proteins. D. A common second-messenger is cyclic AMP. E. The effect of hormones is shorter than the effect of nerve impulses.
Jill is Rh negative. Her first baby was Rh negative. She is pregnant again, but the baby is Rh positive. Without medical treatment, will her antibodies attack the baby's blood?
A) Yes B) No C) Probably not since her first child is Rh negative D) Probably yes since her first child is Rh negative