Mixtures of Helium and Oxygen Are Used in Scuba Diving

question 39

Multiple Choice

Mixtures of helium and oxygen are used in scuba diving tanks to help prevent the bends, which is a condition caused by nitrogen bubbles forming in the bloodstream. If 75 L of oxygen and 25 L of helium at STP are pumped into a scuba tank with volume of 8.0 L, what is the partial pressure of oxygen in the tank?

• A) 3.1 atm
• B) 9.4 atm
• C) 12.5 atm
• D) 15.6 atm
• E) 18.8 atm

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Definitions:

Axons

Long, slender projections of nerve cells that transmit electrical impulses towards other neurons, muscle cells, or glands.

Glomerulus

A network of capillaries located at the beginning of a nephron in the kidney, which filters blood to form urine.

Receptor Types

Various classes of protein molecules located on cell surfaces or within cells that respond to specific chemical signals, playing a key role in communication within the body.

Odorant Binding

The interaction between odorant molecules and specific receptors in the olfactory system, crucial for the sense of smell.