Anatomy- The peripheral Nervous Sytem & Reflex Activity

Question 1

Sensory Receptors: Thermoreceptors

Answer 1

Response to temperature change.

Question 2

Sensory Receptors: photoreceptors

Answer 2

Respond to light energy

Question 3

Sensory receptors: Chemoreceptors

Answer 3

Respond to chemicals in solution(molecules smelled, tasted, change in blood pH)

Question 4

Sensory Receptors: noicereceptors

Answer 4

Respond to pain from potentially damaging stimulus.

Question 5

Exteroreceptors

Answer 5

Sensitive to stimuli arising outside body(touch, pressure, pain)

Question 6

Interoreceptors

Answer 6

a sensory receptor that detects stimulus within the body.

Example: Blood Pressure

Question 7

Proprioceptors

Answer 7

Respond to internal stimuli in skeletal muscle, tendons, joints

Question 8

Nerve:

Answer 8

Cordlike organ of PNS consisting of bundles of axons enclosed in layers of connective tissue

Question 9

Sensory(afferent) nerves

Answer 9

Carry impulses toward CNS

Question 10

Motor(efferent) nerves:

Answer 10

Carries impulses away from CNS

Question 11

Mixed nerves

Answer 11

Contains both motor and sensory

Question 12

Peripheral nerves can be classified as____ or ______

Answer 12

Spinal nerves r or cranial nerves

Question 13

Ganglia

Answer 13

Collections of neuron cell bodies associated with nerves in PNS

Question 14

Sensory Receptors: Mechanoreceptors

Answer 14

Respond to touch, pressure(including blood pressure), vibration, stretch and itch.

Question 15

Cranial Nerve: I.

Answer 15

I. Olfactory- purely sensory(associated with sense of smell)

Question 16

Cranial Nerve: II

Answer 16

II. Optic Nerve

Sensory- deals with vision

Question 17

Cranial Nerve: III

Answer 17

III. Oculomotor

• Motor- eye movement

Question 18

Cranial Nerve: IV

Answer 18

IV. Trochlear
- motor-
Turns eye downward and laterally

Question 19

Cranial Nerve V:

Answer 19

V. Trigeminal
Both
chewing face, mouth, touch & pain

Question 20

Cranial Nerve VI.

Answer 20

VI. Abducens
Motor
Turns eyes laterally

Question 21

Cranial Nerve VII:

Answer 21

VII. Facial
- both - 
most facial expressions 
secretion of tears & saliva
taste

Question 22

Cranial Nerve: VIII.

Answer 22

VIII. Vestibulocochlear

• sensory-
  hearing, balance

Question 23

Cranial Nerve: IX

Answer 23

IX. Glossopharyngeal

• mixed- (taste, tongue, tonsil,muscles for swallowing)

Question 24

Cranial Nerve: X

Answer 24

X. Vagus
Both
 aortic blood pressure 
slows heart rate ,stimulates digestive organs,
taste

Question 25

Cranial Nerve: XI

Answer 25

XI. Accessorysenses controls trapezius & sternocleidomastoid controls swallowing movements Motor

Question 26

Cranial nerve: XII

Answer 26

XII. Hypoglossal -controls tongue movements Motor

Question 27

Spinal Nerves: how many pairs?

Answer 27

31

Question 28

Cervical Plexus:

Answer 28

Cranial Nerves C1-C5;supplies skin and muscles of head, neck, shoulders and chest.

Question 29

Brachial Plexus:

Answer 29

Cranial nerves C5-T1 Supplies shoulders & upper limbs

Question 30

Lumbosacral Plexus

Answer 30

Lower limb, breaches to pelvis, abdomen, & buttocks.

Question 31

Lumbar Plexus

Answer 31

Spinal nerves L1-L4, supplies buttocks and lower limbs

Question 32

Coccygeal plexus:

Answer 32

Spinal Nerves S4-Co Serves the coccyx bone

Question 33

Reflexes: Somatic reflexes

Answer 33

Lead to contraction of skeletal muscles.

Question 34

Reflexes: Autonomic (visceral) reflexes:

Answer 34

Lead to response from smooth muscle, cardiac muscle & glands.