The gate control theory of pain says that pain impulses traveling through the lateral spinothalamic tract can be suppressed by increased activity of the
A. anterior spinothalamic tract.
B. tertiary neurons.
C. extrapyramidal tracts.
D. dorsal column/medial lemniscal system.
E. spinocerebellar tracts.
D
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Lipophilic hormones must interact with which of the following prior to gene activation?
a. membrane receptors. b. molecular chaperones. c. hormone response elements. d. both (a) and (b) above. e. both (b) and (c) above.
Gradation of muscle contraction can be accomplished by stimulating variable portions of each motor unit
Indicate whether the statement is true or false
Sarcoplasm is
A. the cytoplasm of a muscle fiber. B. smooth endoplasmic reticulum that stores calcium. C. tubules that surround myofibrils. D. the plasma membrane of a muscle fiber.
In a person with respiratory acidosis, HCO3- is actively secreted into the urine by the tubular cells.
Answer the following statement true (T) or false (F)