Select all that are true regarding a resting muscle fiber.

The charge difference across the sarcolemma is zero

There is more sodium outside the cell as compared to the sarcoplasm

Chemically-gated ion channels are open

Voltage-gated ion channels are closed

Question

Biology

Courtney Dickson

10 April, 04:48

Select all that are true regarding a resting muscle fiber.

The charge difference across the sarcolemma is zero

There is more sodium outside the cell as compared to the sarcoplasm

Chemically-gated ion channels are open

Voltage-gated ion channels are closed

+3

Answers (1)

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Maryjane Huerta · Answer 1

There is more sodium outside the cell as compared to the sarcoplasm.; Voltage-gated ion channels are closed.

Explanation:

The Na+/K + ATPase pump extrudes 3 Na + ions to the extracellular and 1 K + ion is pumped inside the cell. This leaves the interior of the cell negative.

To maintain the negative charge Voltage-gated potassium channels close the voltage-gated calcium channels.

Select all that are true regarding a resting muscle fiber.The charge difference across the sarcolemma is zeroThere is more sodium outside the cell as compared to the sarcoplasmChemically-gated ion channels are openVoltage-gated ion channels are closed

Select all that are true regarding a resting muscle fiber.

The charge difference across the sarcolemma is zero

There is more sodium outside the cell as compared to the sarcoplasm

Chemically-gated ion channels are open

Voltage-gated ion channels are closed