If 20% of the Air Is Composed of O₂, the Partial

question 179

Multiple Choice

If 20% of the air is composed of O₂, the partial pressure of oxygen at sea level where atmospheric pressure is 760 mm Hg is

• A) 20 mm Hg
• B) 760 mm Hg
• C) 70 mm Hg
• D) 350 mm Hg
• E) 152 mm Hg

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Definitions:

Finger Muscles

Muscles in the fingers that are primarily responsible for controlling movement and providing the ability to grip and manipulate objects.

Sodium Ions

Positively charged atoms of sodium, essential for cellular functions, including the generation and transmission of nerve impulses and the regulation of fluid balance in the body.

Neurotransmitters

Chemical substances in the body that help in transmitting signals across a synapse from one neuron to another.

Synaptic Cleft

A narrow gap between the terminal end of a neuron and the neighbouring neuron or cell, across which neurotransmitters are released for communication.