Which of the following is an example of a physical barrier, which is an innate defense mechanism?
A) secretions of sebaceous glands
B) fixed macrophages
C) perforins
D) cytokines
E) histamine and heparin
A) secretions of sebaceous glands
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Betsy took a fall and broke her arm, which required that she wear a cast for a prolonged period of time. When she took the cast off, she was alarmed to see that her muscles
A. had undergone hypertrophy. B. seemed to have an increase in blood flow. C. looked the same as they did before the fall. D. had undergone atrophy.
When a clinician palpates the armpits and neck to determine if a patient has tenderness in those regions as a result of infection, they are checking for swollen
A. spleens. B. Peyer's patches. C. lymph nodes. D. tonsils. E. thymic tissue.
The most common lipids in the body are
A. triglycerides, and they are used for energy storage in adipose.?B. glycoproteins, and they are used as backbones for cell membranes.?C. eicosanoids, and they are used as hormonal messengers.?D. steroids, and they are used as signaling molecules in inflammatory responses.?E. phospholipids, and they are used as key ingredients of bile salts.
When one exercises at maximum levels, only the blood supply to the ________ is unaffected.
A) lungs B) liver C) brain D) skin E) skeletal muscles