In Humans, the Body Needs to Maintain Oxygen Levels Within

question 58

Multiple Choice

In humans, the body needs to maintain oxygen levels within narrow homeostatic ranges. If the blood oxygen level drops below that range, the body responds by

• A) using positive feedback to further lower the oxygen level.
• B) using negative feedback loops to further lower the oxygen level.
• C) setting this lower oxygen level as the new normal.
• D) using negative feedback loops to return the oxygen level to normal.
• E) using positive feedback to raise the oxygen level.

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Definitions:

Histamine Release

The process by which histamine is released from immune cells into the body, often in response to an allergic reaction, leading to symptoms like itching, swelling, and redness.

Sympathetic Nervous System

A part of the autonomic nervous system that activates the body's fight-or-flight response during stressful situations.

Chronic Obstructive Pulmonary Disease (COPD)

A progressive lung disease that makes it hard to breathe due to obstruction of airflow.

Wakefulness

The state of being awake and aware of one's environment, contrasted with sleep or unconsciousness.