Autonomic Nervous System Practice Questions

Play an AI-generated podcast conversation about this lesson

What type of muscle does the somatic nervous system innervate?

Cardiac muscle and smooth muscle

Skeletal muscle (correct)

Glands

All of the above

What is the structure of the efferent pathways in the autonomic nervous system?

Three neurons, with the cell body of the postganglionic neuron in the CNS

Two neurons, with the preganglionic neuron synapsing with the postganglionic neuron (correct)

Two neurons, with the postganglionic neuron synapsing with the preganglionic neuron

One neuron extending directly to the effector

Which of the following statements about the autonomic nervous system is true?

It contains lightly myelinated or non-myelinated neurons with slow conduction (correct)

It is responsible for controlling voluntary movements

It is a part of the central nervous system

It contains heavily myelinated neurons with fast conduction

What neurotransmitter is released by all preganglionic neurons and some postganglionic neurons?

Acetylcholine Signup and view all the answers

What is the function of the postganglionic neuron in the autonomic nervous system?

To release neurotransmitters to the effector Signup and view all the answers

Which of the following statements about the somatic nervous system is true?

It contains heavily myelinated neurons with fast conduction Signup and view all the answers

Which cranial nerve contains parasympathetic fibers that control the pupillary reflex and also the shape of the lens?

oculomotor (III) Signup and view all the answers

Where do all preganglionic sympathetic fibers originate from in the spinal cord?

lateral horn Signup and view all the answers

Which of the following receives sympathetic input ONLY?

a and c Signup and view all the answers

What type of receptors bind acetylcholine?

cholinergic Signup and view all the answers

What happens to blood vessels when sympathetic fibers are stimulated?

they constrict Signup and view all the answers

What happens to the pupils in a brightly lit environment or in close vision?

they constrict due to parasympathetic innervation Signup and view all the answers

What is the precursor to retinal stored in the pigmented layer of the retina?

Vitamin A Signup and view all the answers

What is the correct order of neurons in the autonomic nervous system?

Preganglionic neurons; sympathetic postganglionic neurons; parasympathetic postganglionic neurons Signup and view all the answers

Which of the following activities is mediated by the parasympathetic nervous system?

Digestion Signup and view all the answers

What is the correct order of layers of the neural retina that incoming light passes through?

Photoreceptors, bipolar cells, ganglion cells Signup and view all the answers

What type of photoreceptors are involved in color/high resolution vision?

Cones Signup and view all the answers

During increased physical activity, which type of receptors are found on the bronchioles and blood vessels serving the skeletal muscles?

Adrenergic B2 receptors Signup and view all the answers

Where are adrenergic B1 receptors primarily found?

On the heart Signup and view all the answers

Which disease is characterized by a build-up of aqueous humor in the eye, increasing the intraocular pressure?

Glaucoma Signup and view all the answers

Which of the following statements is TRUE regarding parasympathetic fibers?

Their origin is craniosacral Signup and view all the answers

What happens to the ciliary muscles when sympathetic nerve fibers are stimulated to view a distant object?

They relax, decreasing the refractive power of the lens Signup and view all the answers

Which cranial nerve contains parasympathetic fibers?

Vagus (X) Signup and view all the answers

What is the light-absorbing molecule bound to a protein called opsin in visual pigments?

Retinal Signup and view all the answers

What membrane do the hair cells of the spiral organ rest upon?

Tectorial membrane Signup and view all the answers

When sound enters the cochlea, which region will it pass through if it is within our frequency range?

All of the above Signup and view all the answers

What happens to the hair cell when the stereocilia pivot in the direction of the tallest stereocilium?

Na+ enters the hair cell and it depolarizes Signup and view all the answers