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Author Question: This substance is released by the nervous system and excites muscle cells (resulting in muscle ... (Read 20 times)

cookcarl

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on: Jul 3, 2018
This substance is released by the nervous system and excites muscle cells (resulting in muscle contraction).
 
  A) actin
   B) myosin
   C) ATP
   D) calcium
   E) acetylcholine

Question 2

The specialized sites that are contacts between cardiac muscle cells are called what?
 
  A) Cardiac cellular gaps B) Intercalated discs
  C) Intercardiac synapses D) Cardiac potential sites


k2629

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Reply #1 on: Jul 3, 2018
Answer to Question 1

E

Answer to Question 2

B


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