Question

1) Write in order the sequence of events that occurs during muscle contraction. Begin in the brain and include all action in the muscle. You can write it out like a flow chart, one action followed by the next.

2.The function of the T tubules is to _________.

A) Store Ca2+ inside the muscle fiber.

B) Rapidly conduct action potentials to the interior of the muscle fiber.

C) To store neurotransmitter

D) Conduct ATP molecules out of the mitochondria throughout the sarcoplasm.

E) All of the above are functions of the T tubules

Answer 1

The sequence of events that occurs during muscle contraction

2. The function of the T tubules is to

• A) Store Ca2+ inside the muscle fiber.
• B) Rapidly conduct action potentials to the interior of the muscle fibre.
• C) To store neurotransmitter
• D) Conduct ATP molecules out of the mitochondria throughout the sarcoplasm.
• E) All of the above are functions of the T tubules

Ans: B) Rapidly conduct action potentials to the interior of the muscle fibre.

The sarcoplasmic reticulum store calcium ions (Ca2+)

Neurotransmitters are stored in synaptic vesicles,

Sarcoplasm Conduct ATP molecules out of the mitochondria throughout the sarcoplasm.