When a person is having a heart attack, the pain originating in the heart muscle is often felt in the left shoulder and arm. This is called
A. Muscle pain
B. Referred pain
C. Deep pain
D. Acute pain
Answer: B. Referred pain
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Mutations in bacterial porins can lead to antibiotic resistance typically by
A) closing the ?-helix of the porin. B) limiting the passage of nonpolar substances. C) blocking entry of the antibiotic. D) disrupting the voltage of the gated channel. E) all of the above
Which of the following is most likely to function as a defense system?
A. the integumentary system B. the musculoskeletal system C. the endocrine system D. the sensory system E. the nervous system
Activated complement proteins
a. produce antigens. b. destroy invading cells. c. mark invading cells for phagocytosis. d. bind to antibodies. e. do more than one of these things
Chronic stress:a
is associated with elevated levels of glucocorticoids. b. may lead to the excessive stimulation of neurons. c. increases blood flow to the brain, especially the hippocampus. d. results in lower levels of epinephrine and norepinephrine. e. promotes the linear growth of the skeleton