An Increase to 0

question 68

Multiple Choice

An increase to 0.5% carbon dioxide in the air (from the normal 0.03%) makes us breathe 10 times faster.Which of the following would limit how long you can hold your breath?

• A)Lack of carbon dioxide raises the pH
• B)Lack of oxygen raises the pH
• C)Buildup of carbon dioxide lowers the pH
• D)Build up of oxygen lowers the pH
• E)Build up of nitrogen raises the pH

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Definitions:

Postsynaptic Membrane

The region of a synapse that receives and responds to neurotransmitter from another neuron.

Receptors

Proteins on the surface of cells that bind to specific molecules, triggering a response within the cell.

Muscle Fiber

A single muscle cell, known for its elongated shape, which contracts to produce bodily movements.

Action Potential

A temporary reversal of an electric polarization of the membrane of a nerve cell or muscle cell.