The First "Big Idea" in Science Standards Revolves Around Systems

question 12

Multiple Choice

The first "big idea" in science standards revolves around systems, order, and organization. Which of the following is NOT an example of a system in this standard?

• A)Computers
• B)Human body
• C)Space
• D)Weather

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Definitions:

Calcium Channel

Calcium channels are protein-based channels within cell membranes that selectively allow calcium ions to move into or out of a cell, playing critical roles in various physiological processes including muscle contraction, neurotransmission, and gene expression.

Myelin Sheath

A fatty layer that surrounds nerve fibers, providing insulation and increasing the speed of electrical transmission along the neuron.

Receptor

A protein on the surface of a cell or inside it that binds to specific molecules, triggering a specific effect in the cell, such as a response to hormones or neurotransmitters.

Neurotransmitters

Chemical substances that transmit signals across a synapse from one neuron to another neuron or muscle or glandular cell.