What Was the Temperature of the Universe at the Time

question 131

Multiple Choice

What was the temperature of the universe at the time the universe became transparent to radiation?

• A) 300,000 K
• B) 30 billion K
• C) 3 K
• D) 3000 K

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Definitions:

ECF

Extracellular fluid, which is the body fluid outside the cells, playing a critical role in transporting nutrients and removing waste.

Resting Membrane Potential

The electrical charge difference across the membrane of a resting neuron or muscle cell, making it polarized and ready for activation.

Na+

Sodium ions, essential for conducting nerve impulses and maintaining the balance of fluids in the body.

Plasma Membrane

The semipermeable membrane surrounding the cytoplasm of a cell, controlling the movement of substances in and out of the cell.