The three-dimensional "fit" between the variable segments of the antibody molecule and the corresponding antigenic determinant site is referred to as __________.
a. the antibody-antigen complex
b. the immunodeficiency complex
c. the protein-complement complex
d. all of the listed responses
Answer: a. the antibody-antigen complex
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Answer the following statement true (T) or false (F)
Why does there seem to be a link between smell and memory?
What will be an ideal response?
Metabotropic receptors typically generate a response by
A) Becoming an open channel as soon as the ligand binds. B) Activating gene transcription. C) Opening an ion channel via signaling from a second messenger cascade. D) Both B and C
The sebaceous glands are simple alveolar glands that secrete a substance known as sebum. The secretion of sebum is stimulated ________.
A) by high temperatures B) when the air temperature drops C) by hormones, especially androgens D) as a protective coating when one is swimming