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.
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The same basic array of bones is modified to give rise to the wing of a bat and the fin of a porpoise. Such anatomical structures are called:
A. inherited. B. homologous. C. analogous. D. uniform. E. evolutionary modifications.
The valence of an atom represents its
A) ability to interact with other atoms. B) electronegativity. C) radioactivity. D) ability to attract electrons. E) ability to interact with water.
Some members of ________ have hami
A) archaea B) bacteria C) eukaryotes D) archaea and bacteria E) bacteria and eukaryotes
Prozac, and drugs like it, promote the reabsorption of serotonin by the presynaptic cell.
Answer the following statement true (T) or false (F)