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During a Well-Baby Checkup,a Mother Is Concerned Because Her 2-Month-Old

question 2

Multiple Choice

During a well-baby checkup,a mother is concerned because her 2-month-old infant cannot hold her head up when she is pulled to a sitting position.Which response by the nurse is appropriate?

Definitions:

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.

Depolarization

The process by which the resting potential of a cell membrane becomes less negative, leading to the initiation of an action potential.

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