Which of the following stimulus parameters is NOT encoded in the pattern of action potentials in a sensory axon?
A. threshold
B. frequency
C. modality
D. duration
E. intensity
ANS: C
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The choroid plexus originates in the
A. dura mater. B. arachnoid. C. pia mater. D. None of the above
Which lymphatic structures absorb dietary lipids that cannot be absorbed by intestinal blood capillaries?
A. Abdominal lymph nodes B. Cisterna chyli C. Lacteals D. Spleen E. Thoracic duct
During a cross-bridge cycle in skeletal muscle,
a. the cross bridge is energized when it splits ATP into ADP and P b. the cross bridge must bind with ATPase before a power stroke will occur c. Ca2+ causes tropomyosin to move off of the myosin's actin-binding sites d. ADP binds to the cross bridge at the end of the power stroke e. both a and b occur
Both the nucleus and the mitochondrion are surrounded by a two layer membrane.
Answer the following statement true (T) or false (F)