Oxford University Press | Online Resource Centre

Choose your answers from a-d by clicking the radio button next to each choice and then press 'Submit' to get your score.

Question 01

Regarding sensory receptor properties:

a) all receptors respond to a specific quality of a stimulus.

b) a touch receptor will generate a constant rate of discharge of its axon for as long as the receptor is stimulated.

c) the first step in sensory transduction is the generation of a receptor potential.

d) the frequency of a train of action potentials in an afferent fiber reflects the intensity of the stimulus given to its receptor.

Question 02

Regarding receptors in the skin:

a) all skin receptors are encapsulated.

b) the receptive fields of touch receptors are uniform in area.

c) the nociceptors of the skin are bare nerve endings.

d) all sensory information from the skin reaches the brain via the dorsal column pathway.

Question 03

Regarding the focusing of the eye:

a) hypermetropia (hyperopia) may be corrected by a diverging lens.

b) the focus of the eye is controlled exclusively by the parasympathetic innervation of the ciliary body.

c) the lens is the chief refractive element of the eye.

d) when the eye focuses on a distant object, the ciliary muscle contracts.

Question 04

Regarding the physiology of the eye:

a) the pressure within the eye (the intraocular pressure) is about 1.5 mm Hg (0.2 kPa).

b) when light is shone in one eye, both pupils constrict.

c) the pupils dilate when the eye is focused on a near object.

d) the aqueous humor is an ultrafiltrate of plasma.

Question 05

Regarding vision:

a) protanopes cannot distinguish between red and green because they lack the pigment for detecting green light.

b) full color vision is possible in dim light.

c) full dark adaptation takes nearly 30 minutes.

d) in a dark-adapted eye, the visual acuity is best at the center of the visual field.

Question 06

Regarding the ear and hearing:

a) the range of human hearing is from 20 Hz to 20 kHz.

b) conductive hearing loss would be evident if a person had a similar degree of hearing loss for air conduction and bone conduction.

c) the ear is most sensitive to frequencies between about 100 Hz and 300 Hz.

d) the endolymph of the scala media is similar in composition to plasma.

Question 07

Regarding the vestibular system:

a) when a subject is rotated in a swiveling chair, his eyes will exhibit a vestibular nystagmus.

b) the utricle will respond to the deceleration of a moving vehicle.

c) the semicircular canals contain perilymph.

d) the semi-circular canals play an essential role in the maintenance of posture.

Oxford University Press, Online Resource Centre, Chapter 08.

Chapter 08

Instructions