Exam 4: The Peripheral Nervous System

The helicotrema is located beyond the tip of the cochlear duct.

A receptor cell initially develops a generator potential by the influx of potassium.

Receptor potentials can be graded,with a stronger stimulus resulting in a larger receptor potential.

Which type of sensory input is NOT integrated into the sense of equilibrium?

Exposure to very loud noises can result in partial conductive deafness.

The external eye muscles contract to change the shape of the lens.

The smaller the receptive fields in a region,will result in what action?

Compare and contrast the senses of taste and olfaction.

What happens when light passes from one medium to a medium of a different density?

__________,a neurotransmitter unique to pain fibres,is released from afferent pain terminals.

Colour blindness may be caused by vitamin A deficiency.

Proprioception is the awareness of the body's position in space.

Photoreceptors are depolarized in the absence of stimulation (i.e.,in the dark)and hyperpolarized when stimulated (i.e.,when exposed to light).

Moving air through the eustachian tube equalizes air pressure on the ________.

Mechanical deformation of the hairs of hair cells in the inner ear always results in depolarization of the hair cell synaptic terminal.

The Pacinian corpuscle is mainly sensitive to temperature changes.

Match the following receptors to their locations by using the answer code (options may be used more than once or not at all). -receptors in semicircular canals

Match the following eye disorder with its description by using the following answer code (options may be used more than once or not at all). -corrected by convex

Which statement about sound waves is NOT correct?

Night blindness develops from a deficiency of vitamin ________.