What happens when action potentials stimulate a muscle at a rate that does not allow relaxation between contractions?
A. The strength of contraction decreases with
subsequent stimuli.
B. The strength of contraction increases with
subsequent stimuli.
C. The strength of contraction does not
change.
D. More motor units are recruited.
B
You might also like to view...
Which of the following is NOT a characteristic of shade leaves on a plant?
A. more chlorophyll production B. less mesophyll tissue C. more air spaces D. lacking an epidermal layer
As sand moves rapidly down the continental slope it can lead to:
a. convergence. b. earthquakes. c. turbidity currents. d. shelf breaks. e. midocean ridges.
Significant mass extinctions occurred during which of the following epochs?
A. Pleistocene, Ordovician, and Triassic B. Ordovician, Triassic, and Jurassic C. Triassic, Permian, and Cretaceous D. Triassic, Permian, Cretaceous, Pleistocene, Ordovician, and Devonian E. Ordovician, Triassic, Jurassic, Silurian, Eocene, and Oligocene
The staggering of the collagen trimmers gives the fibrils a striated appearance in the electron microscope.
a. true b. false