Chapter 7 - Workbook

Question 1

Which receptors react to changes in the outside world?

Answer 1

Sensory receptors

Question 2

Which are neurons that signal muscles and glands to respond?

Answer 2

Efferent neurons

Question 3

Which nerves link the brain with sensory receptors and muscles?

Answer 3

Cranial nerves

Question 4

How many cranial nerves are there?

Answer 4

12 pairs

Question 5

Which nerves link the spinal cord with various structures?

Answer 5

Spinal nerves

Question 6

How many spinal nerves are there?

Answer 6

31 pairs

Question 7

How many sacral nerves are there?

Answer 7

5 pairs of nerves, S1-S5

Question 8

How many Cervical nerves are there?

Answer 8

8 pairs of nerves, C1-C8

Question 9

How may thoracic nerves are there?

Answer 9

12 pairs of nerves, T1-T12

Question 10

How many lumbar nerves are there?

Answer 10

5 pairs of nerves, L1-L5

Question 11

How many coccygeal nerves are there?

Answer 11

1 pair

Question 12

What consists of only afferent (sensory) fibres that transmit information from the sensory receptors to the spinal cord?

Answer 12

The dorsal root

Question 13

What is located just before the dorsal root joins the spinal cord?

Answer 13

Spinal ganglion

Question 14

What consists of only efferent (motor) fibres leaving the spinal cord?

Answer 14

The ventral root

Question 15

Dorsal and ventral roots join to form what?

Answer 15

The spinal nerve

Question 16

The dorsal branch of each nerve supplies the muscles and skin of what part of the vertebral column?

Answer 16

The posterior part

Question 17

What parts of several spinal nerves interconnect and form networks called plexuses?

Answer 17

Ventral branches

Question 18

Which plexus supplies the lower abdominal wall, thigh, and external genital structures?

Answer 18

Lumbar

Question 19

Which plexus supplies the buttock, thigh, leg, and foot?

Answer 19

Sacral

Question 20

What is the nerve that exits from cervical plexus and transmits impulses to the diaphragm?

Answer 20

Phrenic nerve

Question 21

Which plexus supplies the lower part of the shoulder, the arm, and the hand?

Answer 21

Brachial

Question 22

What is the main branch of the sacral plexus, which is the largest nerve in the body?

Answer 22

Sciatic

Question 23

What is the largest nerve arising from the lumbar plexus?

Answer 23

Femoral

Question 24

What is the nerve that arises from the brachial plexus - also called the funny bone?

Answer 24

Ulnar

Question 25

Which plexus sends information to the skin and muscles of part of the head neck, and upper shoulders?

Answer 25

Cervical

Question 26

The efferent system portion of the autonomic division is subdivided into which two systems?

Answer 26

Sympathetic and parasympathetic

Question 27

Neurons of the sympathetic system emerge from which two regions of the spinal cord?

Answer 27

The thoracic and lumbar regions

Question 28

Sympathetic neurons pass through which branch, and then pass into the ganglia?

Answer 28

Autonomic

Question 29

The first efferent neurons are referred to as what?

Answer 29

Preganglionic neurons

Question 30

What is located near or within the walls of the organs they innervate?

Answer 30

Terminal ganglia

Question 31

Which system helps return the body to resting conditions?

Answer 31

Parasympathetic

Question 32

Which receptors are activated when acetylcholine binds with them?

Answer 32

Cholinergic receptors

Question 33

Norepinephrine binds to which receptor?

Answer 33

Adrenergic

Question 34

Which receptors are located on postganglionic neurons in all autonomic ganglia?

Answer 34

Nicotinic receptors

Question 35

Which receptors are found in cardiac muscle fibres, smooth muscle fibres, and gland cells?

Answer 35

Muscarinic receptors

Question 36

Preganglionic and postganglionic fibres of parasympathetic system release which neurotransmitter?

Answer 36

Acetylcholine

Question 37

The afferent and efferent nerves of the somatic division, along with neurons of the autonomic division, make up which nerves?

Answer 37

Cranial and spinal nerves

Question 38

Cranial nerves transmit orders in the form of neural signals from the brain to what?

Answer 38

Sensory receptors

Question 39

There are 12 pairs of which spinal nerves?

Answer 39

Thoracic

Question 40

There are 5 pairs of which spinal nerves?

Answer 40

Lumbar

Question 41

What consists of the cell bodies of sensory neurons?

Answer 41

Spinal ganglion

Question 42

Dorsal and ventral roots join to form what?

Answer 42

A spinal nerve

Question 43

The phrenic nerve, which extends from the cervical plexus, transmits impulses to what?

Answer 43

The diaphragm

Question 44

Two of the nerves that emerge from the brachial plexus are what?

Answer 44

The ulnar and the radial

Question 45

What is the largest nerve in the body?

Answer 45

Femoral nerve