Which of the following will respond to a threshold stimulus with an all-or-none contraction?
A. a single muscle fiber
B. a single motor unit
C. a whole muscle
D. a single muscle fiber and a single motor unit
E. a single muscle fiber, a single motor unit, and a whole muscle
D
You might also like to view...
Dwarfism may be the result of a deficiency of
a. growth-hormone releasing hormone b. GH c. somatomedins d. all of the above e. only b or c
To trigger bone growth, growth hormone stimulates the
A. thyroid to produce calcitriol. B. liver to produce calcitonin. C. liver to produce somatomedin. D. brain to produce serotonin. E. parathyroid to produce parathyroid hormone.
Which glands of the female are homologous to the bulbourethral glands of the male?
A. Paraurethral B. Cervical C. Greater vestibular D. Areolar E. Lesser vestibular
Each of the following terms is a descriptive term for a muscle's action except
A) levator. B) pronator. C) tensor. D) sartorius. E) adductor.