Spinal Cord

Question 1

Dorsal horn

Answer 1

contains interneurons and ventral termination of sensory afferent fibers

Question 2

Ventral horn

Answer 2

Contains interneurons and cell bodies of somatic motor neurons

Question 3

Spinal cord

Answer 3

8 cervical segments, 13 thoracic, 3 sacral, 5 caudal

Question 4

Vertebral column

Answer 4

7 cervical segments, 13 thoracic, 3 sacral, up to 20 caudal

Question 5

Withdrawal reflex

Answer 5

flexes limb, may show crossed-extensor reflex, no signs of pain perception

Question 6

Pain Response

Answer 6

Withdraws limb, turns head toward stimuli, may attempt to bite/move away, whines or barks distorted respiratory pattern

Question 7

Pacinian corpuscles

Answer 7

mechanoreceptors found in subcutaneous tissue

Question 8

Meissner’s corpuscles

Answer 8

specialized rapidly adapting receptors in glabrous skin located superficially within dermal papillae, less sensitive

Question 9

Merkel cells

Answer 9

slowly adaping touch receptors located in hairy skin of the face, glabrous skin, and gingical mucosa. Located in the tips of finger-like extensions of hte epidermis into the intermediate ridges of the dermis

Question 10

A-beta fibers

Answer 10

Touch- Cutaneous receptors Fast

Question 11

A- delta fibers

Answer 11

Touch, temp, and pain- cutaneous receptors. slower

Question 12

C fibers

Answer 12

Temperature and pain- Slowest