The Circular Muscle of the Iris Contracts in Response to Dim

question 209

True/False

The circular muscle of the iris contracts in response to dim light.

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Definitions:

Electronegativity

A measure of an atom's ability to attract and hold onto electrons within a chemical bond.

S-H Bond

Refers to a chemical bond between sulfur and hydrogen, characteristic of thiols or sulfur-containing organic compounds.

Polar Covalent

A type of chemical bond where a pair of electrons is unequally shared between two atoms, leading to a partial positive charge on one atom and a partial negative charge on the other.

Cl-Cl Bond

A covalent bond between two chlorine atoms, often found in molecular chlorine (Cl2).