Describe the tuberculin response and identify the type of response involved
What will be an ideal response?
The tuberculin response is a type of delayed hypersensitivity reaction. It is used to diagnose contact with antigens from Mycobacterium tuberculosis. When tuberculin is injected into the skin of an individual who has never contracted tuberculosis and has never received the tuberculosis vaccine, no response occurs. If the patient has been exposed to tuberculin antigen by infection or prior vaccination, a red swelling develops at the site of injection. This reaction is considered a positive tuberculin response.
Bloom's Taxonomy: Comprehension
Section: Hypersensitivities
Learning Outcome: 18.13
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a. Drug Enforcement Agency (DEA) b. Food and Drug Administration (FDA) c. National Institutes of Health (NIH) d. United States Pharmacopeia (USP)
In the female reproductive cycle, the endometrium is thickest
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The first system in the body to become visibly differentiated during development is the
A. reproductive system. B. cardiovascular system. C. digestive system. D. respiratory system. E. nervous system.
What organisms convert gaseous nitrogen into ammonium or nitrates that can be used by plants?
a. tertiary consumers b. nitrogen-fixing bacteria c. fish d. legumes e. corn and other grains