Which of the following is NOT true of a person who is dehydrated?
A. ADH causes the kidneys to excrete water.
B. Plasma osmolality increases.
C. Increased osmolality causes thirst.
D. Hypothalamus stimulates release of ADH.
Answer: A
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Coupled transport that involves the moving of one substance against its concentration gradient by using energy from a second substance moving down its concentration gradient is known as
A. primary active transport. B. receptor-mediated endocytosis. C. bulk transport. D. sympathetic exocytosis. E. secondary active transport.
____________________ refers to the life-threatening allergic phenomenon characterized by severe hypotension and profound bronchial constriction due to the presence of large amounts of chemical mediators in the blood released from mast cells and basophils in response to a particular allergen
Fill in the blank(s) with correct word
Which of the following is not true of gray matter?
A. It consists of somas, dendrites, and myelinated axons. B. It forms a somewhat butterfly-shaped central core in the spinal cord. C. It is the site of synaptic contact between neurons in the CNS. D. It is found in both the brain and spinal cord. E. It is not found in the PNS.
Atrial contraction occurs just before
A. atrial relaxation and ventricular filling. B. isovolumetric relaxation. C. ventricular ejection. D. isovolumetric contraction.