During Contraction of Skeletal Muscle Fibers, the

question 26

Multiple Choice

During contraction of skeletal muscle fibers, the

• A) contractile proteins contract.
• B) thin filaments slide inward toward the A band's center as a result of cycles of cross-bridge binding and bending.
• C) thick and thin filaments become tightly coiled, thus shortening the sarcomere.
• D) I bands slide in between the A bands.
• E) lateral sacs of the sarcoplasmic reticulum shrink, pulling the Z lines closer together.

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Definitions:

Arterial Blood Gas

A diagnostic test that measures the levels of oxygen, carbon dioxide, and acidity (pH) in arterial blood, used to assess lung function and gas exchange.

Oxygen Saturation

A measure of the amount of oxygen carried by the hemoglobin in the blood relative to its maximum capacity, typically expressed as a percentage.

Pulse Oximetry

A non-invasive method of monitoring an individual's oxygen saturation level in the blood, often using a clip-like device on the finger.

Nasal Cannula

A device used to deliver supplemental oxygen or airflow to a patient or individual needing respiratory help through the nostrils.