What Best Explains the Double-Headed Arrows Associated with Carbon Dioxide

question 26

Multiple Choice

What best explains the double-headed arrows associated with carbon dioxide and molecular oxygen shown in the following illustration?

• A) Individual molecules are unable to cross the membrane,but they can be found in relatively large numbers on both sides.
• B) The membrane is permeable to these small molecules and they enter or leave rapidly as their concentration gradients change.
• C) An isotonic condition exists for each molecule,so no net movement takes place.
• D) Homeostasis requires that surplus molecules entering the cell be rejected and returned to the outside.

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Definitions:

Coronary Arteries

Blood vessels that supply blood and oxygen to the heart muscle, crucial for the heart's function and overall health.

Physical Activity

Any bodily movement produced by skeletal muscles that require energy expenditure, such as exercising or sports.

After-School

Pertaining to the time following the end of the school day; often refers to programs or activities that engage students outside of regular school hours.

Canadian Children

Refers to children residing in Canada, including their social, cultural, and health-related conditions.