Exam 4: Principles of Neural and Hormonal Communication

Alpha and beta are two kinds of ____________________ receptors.

Which of the following statements applies correctly to the optic tracts?

Match the eye disorders, labelled a. through i., with their descriptions. (Options may be used more than once or not at all.) a.colour blindness b.night blindness c.glaucoma d.hyperopia e.diplopia f.presbyopia g.myopia h.cataract i.astigmatism -corrected by convex

Which of these steps is the final signalling step following impulse conduction along the axon terminal?

Vision in bright light is due chiefly to cone activation.

Compare and contrast the autonomic and somatic nervous systems.

Match the ear parts, labelled a. through e., with their characteristics. (Options may be used more than once or not at all.) a.external ear b.middle ear c.cochlea in the inner ear d.semicircular canal in the inner ear e.utricle and saccule in the inner ear -connected with the throat via the eustachian tube

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

Receptors can respond only to electrical stimulation.

Which of these structures normally controls the amount of light entering the eye?

Short wavelengths of light are perceived in the red-orange colour range.

The iris consists of layers of ____________________ and ____________________ smooth muscle fibres.

The term adequate stimulus refers to the intensity of a stimulus developing above a threshold value.

Which of the following structures are located in the middle layer of the retina?

The autonomic nervous system is part of the somatic nervous system.

Which is the first structure to intercept light as it enters the eye?

Which structure contributes the most to the total refractive ability of the eye?

The sclera is the most internal layer of the eye.

Match the rods and cones, labelled a. through c., with their properties. (Options may be used more than once or not at all.) a.rods b.cones c.both rods and cones -little convergence in pathways

The utricle detects changes in head position away from horizontally and vertically directed linear acceleration and deceleration.