The spinal cord transmits information between peripheral nerves and the:
a. sympathetic nervous system
b. autonomic nervous system
c. parasympathetic nervous system
d. white matter
e. brain
e
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B cells interacting with helper T cells are stimulated to differentiate when _____
A) B cells produce IgE antibodies B) B cells release cytokines C) cytotoxic T cells present the class II MHC molecule-antigen complex on their surface D) helper T cells differentiate into cytotoxic T cells E) helper T cells release cytokines
For normal human fertilization to occur, _____
A) many ova must be released B) the uterus must be enlarged C) only one sperm needs to penetrate one egg D) secretion of pituitary follicle-stimulating hormone (FSH) and luteinizing hormone (LH) must decrease E) the secondary oocyte must implant in the uterus
In the United States, most common exposure to Clostridium botulinum and its toxins occurs through __________.
Fill in the blank(s) with correct word(s).
Synthetic compounds similar to which type of plant hormone are used to prolong the shelf life of
vegetables such as lettuces and mushrooms and to keep cut flowers fresh?
a. salicylic acid b. jasmonates c. abscisic acid d. gibberellins e. cytokinins