According to the sliding-filament mechanism, the
a. A bands slide between the I bands
b. thin filaments slide inward toward the center of the A band
c. Z lines slide between the T tubules
d. contractile proteins shorten, thus shortening the sarcomere
e. filaments slide past the lateral sacs of the sarcoplasmic reticulum
B
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Phenotype is the result of genetic influences only.
Answer the following statement true (T) or false (F)
During moderate activity, which of the following is true regarding muscle metabolism?
A) The ATP produced is used to build energy reserves of ATP and glycogen. B) Most ATP is produced through glycolysis, with lactate and hydrogen ions as byproducts. C) Glucose and fatty acids are catabolized. D) Mitochondrial activity provides about one-third of the ATP consumed. E) Mitochondria are not involved.
General sensory receptors are
A) the eye, ear, and nose. B) able to interpret sensations of many different stimulus types. C) concentrated at the ends of the limbs. D) responsible for providing perceptions to the somatomotor cortex. E) distributed throughout the body.
Within the red pulp of the spleen are enlarged capillaries called ________, which have a discontinuous basal lamina that allows blood cells to enter and exit easily.
A. trabecular vessels B. splenic vessels C. splenic cords D. trabecular cords E. splenic sinusoids