Nervous System Review

Front

What is the function of the axon in a neuron?

Back

The axon is covered in myelin and is responsible for transmitting impulses away from the neuron's cell body to other neurons.

Front

What type of photoreceptor is most active in bright light conditions?

Back

Cones are the photoreceptors that are most active in bright environments, and they work with constricted pupils.

Front

List the correct order of sound wave transmission through the ear.

Back

The correct order is: auricle -> auditory canal -> tympanic membrane -> ossicles -> cochlea.

Front

What is the role of the parasympathetic division of the nervous system?

Back

The parasympathetic division reverses the effects of the fight or flight response, promoting a state of rest and digest.

Front

What is the primary function of the sympathetic division of the nervous system?

Back

The sympathetic division is responsible for initiating the fight or flight response during stressful situations.

Front

What is myelin and what is its role in the nervous system?

Back

Myelin is a fatty substance that insulates axons, increasing the speed of electrical impulses along the neuron.

Front

What are the two main divisions of the autonomic nervous system?

Back

The two main divisions are the sympathetic division and the parasympathetic division.

Front

How do cones and rods differ in their function?

Back

Cones are responsible for color vision and function best in bright light, while rods are more sensitive to low light and are responsible for night vision.

Front

What is the significance of the tympanic membrane in hearing?

Back

The tympanic membrane, or eardrum, vibrates in response to sound waves, transmitting these vibrations to the ossicles.

Front

What are ossicles and what is their function?

Back

Ossicles are three small bones in the middle ear (malleus, incus, stapes) that amplify and transmit sound vibrations from the tympanic membrane to the cochlea.