The Greatest Decline in Visual Perception Beyond 75,and Especially Beyond

question 47

Multiple Choice

The greatest decline in visual perception beyond 75,and especially beyond 85,involves:

• A)tolerance for glare.
• B)dark adaptation.
• C)area of the visual field.
• D)color vision.

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Definitions:

Dorsal Root Ganglion

A cluster of sensory neuron cell bodies located within the dorsal root of a spinal nerve.

Synaptic Delay

The time lag between the arrival of an action potential at the axon terminal of a neuron and the creation of a postsynaptic potential.

Polysynaptic Reflex

A reflex arc that involves multiple synapses between neurons within the central nervous system, leading to a more complex response.

Cross Extension Reflex

A reflex action that involves the contraction of extensor muscles in one limb when the flexor muscles are contracted in the opposite limb, crucial for coordinated locomotion.