Protein catalysts in the body that increase the rate of chemical reactions are called ____
a. amino acids
b. enzymes
c. atoms
d. nucleotides
b
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In a plasma membrane, simple diffusion of various substances can occur
a. through channels b. through carriers c. between phospholipid molecules d. through aquaporins e. into the cell but not out of the cell
The area in the center of the A band that contains only thick filaments is the
A) Z line. B) M line. C) H band. D) I band. E) Zone of overlap.
Which of the following is NOT a product of glycolysis?
A. carbon dioxide B. ATP C. pyruvate D. NADH
Which of the following statements about control of body movement is FALSE?
A. The corticospinal motor pathways control most fine, discrete muscle activity. B. The brainstem pathways control postural and most other coordinated body movements. C. The cerebellum fine-tunes ongoing movement and helps to coordinate movements. D. The corticobulbar pathways begin in the sensorimotor cortex and end in the brainstem. E. The corticospinal tracts from the right sensorimotor cortex control movements of limbs on the right side of the body.