The Eye

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    What is the function of the eye?

    Responds to light stimuli.

    How does the eye focus on near objects?

    Ciliary muscles contract, lens becomes more convex.

    What causes the blind spot in the eye?

    Absence of rods and cones on the optic nerve.

    What happens to the pupil in bright light?

    Contracts to reduce light intake.

    How do short-sighted people see objects?

    Focus in front of the retina due to excessive light bending.

    What is the iris reflex?

    Adjusts pupil size to protect the retina from bright light.

    What role do neurotransmitters play in nerve impulses?

    Transmit signals across synapses between neurons.

    How do long-sighted people focus on distant objects?

    Focus behind the retina due to insufficient light bending.

    What is accommodation in the eye?

    The process of focusing on objects at varying distances.

    What is the difference between white matter and grey matter?

    White matter contains myelinated neurons; grey matter does not.

    What happens to the pupil in the dark?

    Dilates to allow more light in.

    How do drugs like LSD affect neurotransmission?

    Mimic neurotransmitters and bind to their receptors.

    What is the role of the optic nerve?

    Connects the eye to the central nervous system.