The Ptolemaic Universe Was Based on

question 76

Multiple Choice

The Ptolemaic universe was based on

• A) the idea that the earth rested on the back of a giant turtle.
• B) a motionless earth surrounded by nine hollow spheres.
• C) a heliocentric structure.
• D) the unifying principle of gravity.
• E) the observations of Galileo.

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Definitions:

T Suppressor

A type of T cell that plays a role in the immune system by inhibiting the actions of other immune cells to prevent excessive reactions.

B Receptor

A protein located on the surface of cells that binds to specific molecules like hormones, often involved in signaling pathways. If "B Receptor" is a typographical error for a known type of receptor like "beta receptors," then: NO.

MHC Class I

MHC Class I molecules are proteins on the surface of cells that present peptide fragments to the immune system, crucial for the recognition of foreign pathogens.

Foreign Antigen

A substance from outside the body that triggers an immune response when detected by the body's immune system.