Exam 4: Principles of Neural and Hormonal Communication

Match the types of autonomic receptors, labelled a. through e., with their characteristic(s). (More than one answer may apply.) a.nicotinic receptors b.muscarinic receptors c.alpha receptors d.beta-1 receptors e.beta-2 receptors -bind with acetylcholine released from parasympathetic postganglionic fibres

The stapes is attached to the round window.

Which of these fibres release norepinephrine?

Axons from retinal ganglion cells form the optic nerve.

Depth perception comes about in large part because of binocular vision.

The incus is a structure of the middle ear.

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 -low acuity

Unmyelinated C fibres send impulses for slow pain pathways.

Why do cones have higher acuity than rods?

Which statement applies correctly to fovea?

Binding of ____________________ to nicotinic receptors is always excitatory.

It is possible through the use of drugs to activate the receptors found in bronchiolar smooth muscle without influencing the receptors in the heart.

Which of the following statements describes astigmatism?

Which of the following structures is NOT involved in sending a vibrational signal to the inner ear?

____________________ are travelling vibrations of air that consist of alternating regions of low and high pressure caused by rarefaction of the molecules.

The terminals of both autonomic nerve fibres and motor neurons end in a single, enlarged knoblike structure that releases neurotransmitter.

Match the terms, labelled a. through c., with their descriptions. (Options may be used more than once or not at all.) a.timbre (quality) b.pitch (tone) c.intensity of a sound wave (loudness) -frequency of sound waves

Taste buds are chemoreceptors.

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 -confer colour vision

The Pacinian corpuscle is sensitive mainly to temperature changes.