Question

8.Which muscle fibers contract at slow speed?

a. Red muscles fibers

b. White muscles fibers

c. First twitch fibers

d. None of the above

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Answer 1

Answer:

It is white muscles fibers.

Answer 2

Red muscle fibers contract at a slow speed. (OPTION B)

RED MUSCLE FIBER -

• A red muscle fiber is known as slow-twitch fiber.
• The muscles are red because they contain lots of blood vessels.
• The oxygen demand for contraction of the muscles is high as they produce a large amount of energy at a slow pace.
• A slow muscle fiber is required for endurance activities such as long-run and cycling.