The nervous system and the eye

Which of the following is NOT a part of the central nervous system?

• Brain

• Spinal cord

• Peripheral nerves

• Cerebellum

The junction between two nerve cells where neurotransmitters are released is called a:

• Neuron

• Synapse

• Axon

• Dendrite

In a reflex arc, the order of components from stimulus to response is:

• Receptor, sensory neuron, motor neuron, effector

• Effector, motor neuron, sensory neuron, receptor

• Receptor, motor neuron, sensory neuron, effector

• Sensory neuron, receptor, effector, motor neuron

Which part of the eye is responsible for focusing light onto the retina?

• Cornea

• Iris

• Lens

• Optic nerve

Neurotransmitters function by:

• Generating electrical impulses

• Transmitting signals across synapses

• Producing hormones

• Repairing damaged neurons

The spinal cord is important because it:

• Produces cerebrospinal fluid

• Stores long-term memories

• Connects the brain to the peripheral nervous system

• Regulates body temperature

In the eye, the structure that controls the amount of light entering is the:

• Pupil

• Retina

• Sclera

• Cornea

A simple reflex arc involves a minimum of:

• Two neurons

• Three neurons

• Four neurons

• Five neurons

Which of the following is NOT a function of neurotransmitters?

• Excitation of the postsynaptic neuron

• Inhibition of the postsynaptic neuron

• Direct transmission of electrical impulses

• Regulation of synaptic signaling

The function of rod cells in the retina is to:

• Detect color

• Focus light

• Detect motion

• Detect low light levels