Chapter 13 Flashcards Preview

Biol 223 > Chapter 13 > Flashcards

Flashcards in Chapter 13 Deck (49)
Loading flashcards...
1

The PNS detects ............. stimuli and delivers the information to the CNS as sensory input.

sensory

2

The CNS processes the input and transmits the impulse through the PNS to ............. cells and ............... as motor output.

muscle cells and glands

3

Summarize the function of the somatic sensory division.

detects stimuli of both general and special senses and sends it to CNS

4

Summarize the function of the visceral sensory division.

relays sensory info from organs in the abdominopelvic and thoracic cavities to the CNS

5

The sensory division consists of ............ neurons, whereas the motor division consists of .............. neurons

afferent, efferent

6

Generalize the function of the somatic motor division.

stimulate skeletal muscle contractions

7

Generalize the function of the visceral motor division (autonomic motor nervous system, ANS).

maintains homeostasis by controlling involuntary function. Stimulates cardiac and smooth muscle.

8

What is the sympathetic nervous system of the ANS (fight or flight division) involved in?

maintains homeostasis when the body is involved in any type of work. Mediates visceral responses to emotion.

9

What is the parasympathetic system of the ANS (rest and digest division) involved in?

digestion and maintaining homeostasis when body is at rest

10

What do mixed nerves contain?

both sensory and motor neurons

11

Sensory nerves contain only .............. neurons, while motor nerves contain mostly motor neurons and some ............... neurons involved in muscle stretch and tension.

sensory, sensory

12

Two collections of axons connect the PNS with the spinal cord's gray matter: the anterior root consists of ........... neurons from the anterior horn, and the posterior root consists of .............. neurons from the posterior horn.

motor, sensory

13

How many pairs of spinal roots are there? True or false, they are all mixed nerves.

31, true

14

What is the function of the epineurium? What is the function of the perineurium? What is the function of the endoneurium?

1. binds bundles of fascicles into one spinal nerve
2. binds individual fascicles
3. binds the axons within a fascicle

15

spinal nerves are formed by the fusion of ?

anterior and posterior roots

16

The spinal nerve is short and divides into the following two mixed nerves ........... and .............

anterior ramus and posterior ramus

17

Thirty-one pairs of spinal nerves consist of .......... pairs of cervical nerves, .............. pairs of thoracic nerves, .............. pairs each of lumbar and sacral nerves, and one pair of coccygeal nerves.

8, 12, 5

18

The anterior rami of the cervical, lumbar, and sacral spinal nerves each merge to form complicated networks of nerves called

nerve plexuses

19

What do the branches of the cervical plexus serve?

sensory to the skin of chest, shoulder and ear, and motor to diaphragm and swallowing muscles

20

the phrenic nerve innervates the .......

diaphragm

21

Do Thoracic Spinal Nerves form plexuses?

no, except for T-1

22

What do nerve branches from the Lumbar plexuses innervate?

mainly the pelvis and lower extremity

23

The ............... nerve, the longest and largest nerve in the body, contains axons from both the anterior and posterior divisions of the sacral plexus. It travels through the greater sciatic notch in the pelvis into the thigh, passing between the greater trochanter and the ischial tuberosity. What does this nerve innervate?

sciatic, the hip joint, feeds into the fibular and tibial nerves

24

What are the 5 major nerves of the brachioplexus?

1. Axillary
2. Radial
3. Musculocutaneous
4. Median
5. Ulnar

25

The anterior division of the Lumbar plexus's largest member is the .................. which enters the thigh from the pelvis via the obturator foramen. What do branches of this nerve innervate?

Obturator nerve. Adductors, hip joint and inner thigh skin

26

The posterior division of the Lumbar plexus's largest member, the ........... nerve, is the largest branch of the lumbar plexus. This nerve travel from the psoas, through the pelvis and under the inguinal ligament to enter the thigh. What does this nerve innervate?

Femoral nerve, Quads, knee, and skin of thigh

27

What do nerve branches from the Sacral plexus innervate?

pelvis, gluteal region, and much of the lower extremity.

28

What do the branches of the tibial nerve innervate?

hamstrings, knee, gastroc, ankle, and plantar flexor muscles

29

What does the common fibular nerve and its branches innervate?

knee and distal leg

30

Rapidly adapting receptors respond rapidly with high intensity to stimuli but stop sending signals after a certain time period, called ................... These receptors detect the initiation of stimuli but ignore ongoing stimuli.

adaptation