QUESTION 13 In muscle function at the sarcomere level, the formation of cross-bridges is regulated by the binding of ___

[answerhappygod]

QUESTION 13
In muscle function at the sarcomere level, the formation of
cross-bridges is regulated by the binding of ___ ions to ____.
sodium; tropomyosin
calcium; troponin
sodium; troponin
calcium; tropomyosin
1 points
QUESTION 14
During ejaculation, sperm cells and semen is released from the
reproductive tract of a male. What are the three glands that
produce the liquid portion of semen?
seminal vesicles; hypothalamus; bulbourethral
hypothalamus; prostate; Leydig
prostate; seminal vesicles; bulbourethral
seminal vesicle; Leydig; hypothalamus
1 points
QUESTION 15
Muscle contraction is caused by
myelin filaments sliding past each other.
actin filaments sliding past myelin filaments.
actin filaments sliding past each other.
actin filaments sliding past myosin filaments.
1 points
QUESTION 16
The brain and spinal cord constitute the _______ nervous system
of vertebrates and they receive information about the internal or
external environment from the _______ nervous system
central; autonomic
autonomic; peripheral
peripheral; central
central; peripheral