08 Jan The sympathetic nervous system

BSC2346 Human Anatomy and Physiology

Module 08 Quiz

Question 1

Which of the following best describes the deep tendon reflex?

Answers:

Muscle contraction occurs when its tendon is stretched quickly in order to protect the muscle/tendon from tearing injury.

It’s always initiated by a painful stimulus

Causes an automatic response that withdrawals the body from a painful stimulus

It accompanies the flexor response to prevent movement.

Question 2

Which of the following choices is an effect of the parasympathetic nervous system?

Answers:

Increased blood flow to skeletal muscles

Increased blood pressure

Dilation of the bronchi in the lungs to increase airflow

Stimulates elimination of wastes such as feces and urine

Question 3

The parasympathetic nervous system is responsible for which of the following functions?

Answers:

Decreased heart rate

Increased respiration rate

Decreased blood flow to digestive organs

Increased blood flow to skeletal muscles

Question 4

What statement is true regarding the sympathetic nervous system?

Answers:

The preganglionic axons originate from the cervical region of the spinal cord

All of the postganglionic axons originate in the cerebrum

The postganglionic fibers are all very short in length when compared to the postganglionic fibers of the parasympathetic nervous system

Prepares the body for “fight or flight” activities/responses

Question 5

Which of the following components is the first step in the reflex arc?

Answers:

Receptor

Sensory neuron

Integration

Effector

Question 6

Which cranial nerve is responsible for the parasympathetic response in a wide variety of internal organs including the heart, lungs, intestines and liver?

Answers:

CN V: Trigeminal nerve

CN X: Vagus nerve

CN IX: Glossopharyngeal nerve

CN IV: Trochlear nerve

Question 7

Which of the following choices is true regarding reflexes?

Answers:

Neural integration (processing) of all reflexes occurs in the brain

Somatic reflexes activate skeletal muscle

The motor neuron of a reflex arc transmit afferent impulses to the spinal cord

The stretch or tendon reflexes are only present in children under 5 years of age

Question 8

A lower motor neuron only innervates skeletal muscles.

Answers:

True

False

Question 9

Which of the following choices forms the Sciatic nerve and branches into the Tibial and Common Fibular Nerves?

Answers:

Cervical Plexus

Brachial Plexus

Lumbar Plexus

Sacral Plexus

Question 10

Which major nerve is the largest and thickest nerve in the body and innervates a majority of the entire lower limb?

Answers:

Sciatic nerve

Ulnar nerve

Sacral nerve

Axillary nerve

Question 11

Which statement is true regarding spinal nerves?

Answers:

The dorsal root of the spinal nerve will contain motor fibers (axons) that innervate the skeletal muscles

All 31 spinal nerves contain thousands of individual nerve fibers (axons) carrying information to and from the spinal cord

Spinal nerves only innervate the skin, muscles and joints

Each spinal nerve is designated as a motor nerve only or a sensory nerve only

Question 12

A ganglia is a collection of nerve cell bodies within the peripheral nervous system.

Answers:

True

False

Question 13

Upper motor neurons are efferent neurons that originate in the cerebrum or brain stem.

Answers:

True

False

Question 14

Referred pain is when the brain perceives visceral pain as somatic pain.

Answers:

True

False

Question 15

The sympathetic nervous system is responsible for which of the following functions?

Answers:

Dilating pupils

Constricting bronchioles

Decreasing blood pressure

Increasing urinary function