The Earliest Writing Systems Are About __________ Years Old

question 20

Multiple Choice

The earliest writing systems are about __________ years old.

• A) 6,000
• B) 2,000
• C) 3,000
• D) 10,000

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Definitions:

Excitation-Contraction Coupling

The physiological process that links muscle fiber excitation to muscle contraction, primarily in skeletal and cardiac muscles.

T Tubules

Extensions of the cell membrane that penetrate into the center of skeletal and cardiac muscle cells, aiding in the transmission of electrical impulses.

Action Potential

A rapid rise and subsequent fall in voltage or membrane potential across a cellular membrane.

Sarcoplasmic Reticulum

A specialized type of smooth endoplasmic reticulum found in muscle cells, responsible for storing and releasing calcium ions during muscle contraction and relaxation.