The T wave represents the depolarization of the ventricles
Indicate whether the statement is true or false
F
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Both morphine and codeine produce analgesia, which means that they
a. activate the central nervous system. b. relieve pain and produce euphoria. c. increase alertness. d. cause delusions and dissociative experiences.
Which of the following provides the best example of a negative feedback control mechanism?
A. Shivering and generating heat in response to a drop in body temperature B. Increased uterine contractions in response to oxytocin during labor C. Putting on a sweater because you think it is cold outside D. Increased body temperature in response to exercise
The MHC (major histocompatibility complex) class molecules
A. are only found on B cells. B. are found in the nucleus of cells. C. allow the immune system to respond to antigens inside cells. D. are lipoproteins on cell surfaces. E. do not attach to plasma membranes.
Which statement is incorrect?
a. Plasma proteins are responsible for the blood colloid osmotic pressure. b. Plasma proteins provide a source of readily available amino acids to be utilized by the tissue cells for the synthesis of new tissue proteins. c. Antibodies are gamma globulins important in the body's defense mechanism. d. Plasma proteins play a role in buffering changes in pH in the body fluids. e. The presence of plasma proteins in the blood is the primary factor responsible for preventing excessive loss of plasma from the capillaries into the interstitial fluid.