All of the Following Statements Are True EXCEPT

question 21

Multiple Choice

All of the following statements are true EXCEPT:

• A)emission of fuel vapors from the fuel tank can be controlled by sealing the fuel system from the atmosphere.
• B)on a hot day, gasoline in the tank contracts.
• C)air must be allowed to enter the fuel tank to take the place of fuel as it is consumed.
• D)the fuel tank can be vented by the gas cap or by a vent solenoid.

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Definitions:

Na+ Channels

Protein pores in the membranes of cells that allow the passage of sodium ions (Na+) into or out of the cell, crucial for the initiation and propagation of electrical signals in neurons and muscle cells.

Ca2+ Channels

Protein channels in cell membranes that allow the movement of calcium ions (Ca2+) into or out of a cell, playing critical roles in cellular functions.

Na+ Channels

Specialized proteins in cell membranes that allow sodium ions to enter or leave a cell, playing a key role in generating electrical signals.

SA Node

The sinoatrial node, a group of cells located in the right atrium of the heart that initiates the electrical impulses governing the heart rate, often considered the heart's natural pacemaker.