The total refractory period of cardiac muscle _____
A) is about the same as the total refractory period for skeletal muscle
B) is shorter than the total refractory period for skeletal muscle
C) is longer than the contraction of cardiac muscle
D) is longer than the total refractory period for skeletal muscle
Answer: D) is longer than the total refractory period for skeletal muscle
You might also like to view...
Which of the following is true of the structures of the sympathetic chain?
A) About 8 percent of the axons of each spinal nerve are parasympathetic postganglionic fibers. B) Each chain contains about 3 cervical, 11 thoracic, 4 lumbar, and 4 sacral sympathetic ganglia. C) Preganglionic sympathetic neurons are located in the cervical and thoracic regions only. D) These nerves have white rami, but lack gray rami. E) None of the answers are correct.
Implantation occurs in the
A. myometrium. B. vagina. C. uterine (Fallopian) tube. D. endometrium.
After completing a marathon on a particularly warm day, Dave consumes four liters of water. Soon after, he begins to feel nauseous and starts vomiting. What is likely happening to Dave?
A) hypoproteinemia; unusually low levels of plasma proteins B) obligatory water loss C) dehydration D) hyponatremia; very low extracellular sodium ion concentration
Ribosomes function in the process of
a. transcription. b. translation. c. transversion. d. transformation. e. transition.