Helper T cells bind to antigen complexed with class II MHC proteins, while cytotoxic T cells bind to antigen complexed with class I MHC proteins
Indicate whether the statement is true or false.
TRUE
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________ is a blood condition in which there is a lower than normal number of red blood cells or abnormal or deficient hemoglobin.
A. Sickle cell anemia B. Leukemia C. Leukocytosis D. Anemia
Tetanus toxin
a. binds with glycine receptors, thus blocking the action of this inhibitory neurotransmitter b. destroys dopamine in the region of the brain involved in controlling complex movements c. prevents the release of GABA that inhibits neurons that innervate skeletal muscle cells d. promotes presynaptic facilitation e. causes IPSPs to occur on skeletal muscle cell membranes
The midsagittal plane divides the body into which parts?
A. Superior and inferior B. Internal and external C. Right and left D. Anterior and posterior
The collecting duct becomes more permeable to water when
A. colloid osmotic pressure increases. B. ADH production increases. C. plasma osmolality decreases. D. aldosterone production decreases. E. ADH production decreases.