Which of These Physical Skills Typically Develops LAST

question 44

Multiple Choice

Which of these physical skills typically develops LAST?

• A) rolling over
• B) standing alone
• C) walking
• D) sucking

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Definitions:

Pacemaker Potential

Pacemaker potential refers to the spontaneous gradual depolarization of the membrane potential in pacemaker cells, leading to the initiation of action potentials in certain heart cells.

SA Node

The sinoatrial node, often described as the heart's natural pacemaker, initiating the electrical impulses that set the pace for cardiac rhythm.

Voltage-gated

Refers to ion channels that open or close in response to changes in electrical potential across a cell's membrane.

Intercalated Discs

Specialized connections between heart muscle cells (cardiomyocytes) that facilitate coordinated contraction.