Where Does the Oxygen Required for Aerobic Respiration Enter the Body

question 10

Multiple Choice

Where does the oxygen required for aerobic respiration enter the body?

• A) from food we eat
• B) through the lungs
• C) through the skin
• D) from water we drink
• E) through symbiotic bacteria living in our lungs

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Definitions:

Plasma Membrane

The plasma membrane is a biological membrane that separates the interior of all cells from the outside environment, controlling the passage of substances in and out.

Cytoplasm

The gel-like substance inside a cell, excluding the nucleus, containing organelles and involved in multiple cell functions.

Penetration

The process of entering or piercing through a substance, structure, or barrier.

Escape Hypothesis

A theory suggesting that some cellular organelles, such as mitochondria and chloroplasts, originated from bacteria that once entered a host cell and lived symbiotically.