During Aerobic Exercise, the Partial Pressure of Oxygen in Muscle

question 20

Multiple Choice

During aerobic exercise, the partial pressure of oxygen in muscle cells will ________, thus the rate of diffusion of oxygen into the muscle tissue from the blood will ________.

• A) decrease; increase
• B) increase; decrease
• C) not change; also not change
• D) decrease; decrease

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Definitions:

Phospholipase C

An enzyme that plays a key role in cell signaling, breaking down phospholipids to generate second messengers like diacylglycerol and inositol triphosphate.

Second Messengers

Small molecules or ions that transmit signals from a receptor to a target inside the cell, facilitating intracellular communication.

DAG

Diacylglycerol, a lipid molecule that acts as a second messenger in signal transduction pathways within cells.

Signal Amplification

The process by which a few signaling molecules can elicit major responses in the cell; the strength of each signaling molecule is magnified.