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Author Question: Which layer forms the fascicles in skeletal muscle? a. Tendon sheath b. Endomysium c. Epimysium ... (Read 70 times)

deesands

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on: Jun 25, 2018
Which layer forms the fascicles in skeletal muscle?
 
  a. Tendon sheath
  b. Endomysium
  c. Epimysium
  d. Perimysium

Question 2

Which ions directly control the contraction of muscles?
 
  a. Sodium
  b. Potassium
  c. Calcium
  d. Magnesium


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Jody Vaughn

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Reply #1 on: Jun 25, 2018
Answer to Question 1

ANS: D
The perimysium further subdivides the muscle fibers into bundles of connective tissue called fas-cicles. None of the other options forms fascicles.

Answer to Question 2

ANS: C
Contraction begins as the calcium ions combine with troponin, a reaction that overcomes the in-hibitory function of the troponin-tropomyosin system. The release of intracellular calcium ions is the critical link between a nerve impulse (electrical excitation) and muscle contraction. The criti-cal link that allows for the contraction of muscles is not reliant upon sodium, potassium, or mag-nesium.


deesands

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Reply 2 on: Jun 25, 2018
Great answer, keep it coming :)

Joy Chen

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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