At Which of These Rates Can the Atrioventricular Node Initiate

question 7

Multiple Choice

At which of these rates can the atrioventricular node initiate a heartbeat?

• A)10 to 20
• B)25 to 35
• C)40 to 60
• D)80 to 100

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Definitions:

Concentration Difference

The variation in the amount of a substance in two areas, which can lead to diffusion, where substances move from an area of high concentration to one of lower concentration.

Selectively Permeable

Property of the plasma membrane that allows some substances to pass, but prohibits the movement of others.

Osmosis

The movement of water across a semipermeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Plasmolyzed

A condition in plant cells in which the plasma membrane pulls away from the cell wall due to the loss of water through osmosis.