Question

what are the correct answers?

Question 1 of 20 0.0/ 1.0 Points What roles do calcium ions play? Indicate EVERY correct response. A. Ca2+ transmits the electrical signal down the length of the axon B. Ca2+ binds to the skeletal muscle receptors at the synapse C. Ca2 stabilizes the sarcomere structure during times of metabolic stre ss D. Ca2+ trigger exOcytosis of the neurotransmitters at the neuromuscular junction E. Ca+ causes the troponin/tropomyosin to expose actin's binding sites Question 13 of 20 0.75/1.0 Points Indicate every correct response regarding smooth muscles A. respond quickly to stimulation; quickly fatigue B. cells are branched and striated C. anchored together by intercalated discs D. Innervation from the Somatic Nervous System (SNS) E. responds to being stretched by contracting F. can be stimulated by pacemaker cells G. respond slowly to stimulation; rarely fatigue H. Innervation from the Autonomic Nervous System (ANS)

Answer 1

Role of calcium -

Transmission of electrical signal down the length of axon occurs due to the inflow of sodium ions, generation and propagation of action potential. Calcium has no role to play here.

Hence, options D and E are correct.

Smooth muscle -

E,G,H are correct options.