Sinoatrial Node Cells

question 67

Multiple Choice

Sinoatrial node cells

• A)reach threshold only when action potentials generated by the AV node arrive through gap junctions.
• B)exhibit spontaneous depolarization that is speeded by activation of their cholinergic receptors.
• C)exhibit spontaneous depolarization that is speeded by activation of their beta-adrenergic receptors.
• D)exhibit a steep upstroke due to the presence of the same type of Na⁺ channels found in neuronal membranes. 
• E)are between atrial muscle cells and cells of the bundle of His.

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Definitions:

Standard Precautions

Guidelines recommended by the Centers for Disease Control and Prevention (CDC) to reduce risk of transmission of bloodborne and other pathogens in hospitals.

Evacuation Routes

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Oxygen Shut-Offs

Safety mechanisms in healthcare facilities designed to control or stop the flow of oxygen in the event of a fire.

Bedridden Patients

Individuals confined to bed due to illness or disability, necessitating comprehensive care and assistance.