The Ozone Layer Is

question 4

Multiple Choice

The ozone layer is

• A)transparent to ultraviolet radiation.
• B)opaque to ultraviolet radiation.
• C)opaque to visible light.
• D)opaque to infrared radiation.
• E)responsible for producing most of the oxygen that animal life needs.

---

Definitions:

Baroreceptors

Sensory nerve endings found in the walls of arteries and the heart that sense changes in blood pressure.

Blood Pressure

The force exerted by circulating blood on the walls of blood vessels, often measured as an indicator of heart health.

Cardioregulatory Center

A region of the brain, specifically in the medulla oblongata, that regulates heart rate and blood pressure by coordinating the autonomic nervous and the cardiovascular systems.

Vasodilator Substance

Chemicals that relax and expand blood vessels, increasing blood flow and decreasing blood pressure.