What Structure Is Primarily Responsible for Focusing Light onto the Back

question 25

Multiple Choice

What structure is primarily responsible for focusing light onto the back of the eye?

• A)cornea
• B)fovea
• C)lens
• D)retina

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Definitions:

Presynaptic Terminal

The end part of a nerve cell (neuron) that communicates signals to another neuron or muscle cell across a synapse.

Postsynaptic Membrane

The region of a neuron that receives and responds to neurotransmitter signals from another neuron at a synapse.

Action Potential

A rapid rise and subsequent fall in voltage or electrical charge across a cellular membrane, typically neurons, signaling along the nerve.

Resting Membrane Potential

This refers to the voltage difference across the membrane of a resting (non-conducting) neuron, maintaining a balance of ionic gradients.