All of the following may be considered second messengers except
a. inositol triphosphate
b. calcium ions
c. phosphodiesterase
d. cyclic AMP
e. diacylglycerol
C
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A primary immune response ________, and a secondary immune response ________.
A. produces antibodies within five to ten days of exposure to antigens; produces antibodies within a day or two of a subsequent exposure to the same antigen B. occurs only in children; occurs only in adults C. is very rapid in producing antibodies after exposure to antigens; is very slow in producing antibodies after exposure to antigens D. is very important; is less important to the body's ability to protect itself
Match each term with the appropriate description.
1. lipophobic molecule that interacts with receptors on cell surface 2. site of vasopressin synthesis 3. true endocrine gland of epithelial origin 4. cannot be stored in secretory vesicles 5. derivatives of tyrosine 6. storage and release site for oxytocin A. peptide hormone B. steroid hormone C. amino acid-derived hormone D. anterior pituitary E. hypothalamus F. posterior pituitary
The ______ ______ in the knee joint help prevent displacement of the
articulating surfaces. Fill in the blank(s) with correct word
________ is an example of the cooperative effect between the two autonomic nervous system divisions.
A. Vasomotor tone B. Bronchodilation C. Orgasm D. Gastrointestinal secretion E. Heart rate