Somatosensory Receptors

Question 1

ruffini endings detect ________, located on dermis of hairy/glaborous skin

Answer 1

pressure on skin

Question 2

pacinian corpuscles detect _________, are located in deep dermis in hair/glabrous skin

Answer 2

vibration

Question 3

meissner corpuscles detect _______, located in dermis of glabrous skin

Answer 3

vibration

Question 4

merkel cells detect _________ of the skin, located in epidermis of glabrous skin

Answer 4

pressure

Question 5

pacinian corpuscles and meissner’s are _______ adapting receptors, show a decline in action potential frequency with time in response to a constant stimulus

Answer 5

rapidly

Question 6

muscle spindles (group Ia and II afferents) are arranged in _____ with extrafusal fibers

Answer 6

parallel

Question 7

muscle spindles detect ______ (chain fibers) and ________ ( bag fibers) changes

Answer 7

static, dynamic

Question 8

role of muscle spindle afferents to provide feedback to cerebellum about muscle ________ and _______

Answer 8

length, velocity

Question 9

gamma motorneurons activate the Ia and II afferents on ______ fibers, increasing firing rate at _______ length

Answer 9

chain, constant

Question 10

gamma motorneurons increase the sensitivity of spindle Ia and II afferents to _____

Answer 10

length

Question 11

monitor stresses and forces (tension) at the tendon

Answer 11

golgi tendon organs

Question 12

golgi tendon organs are arranged in _____ with extrafusal muscle fibers

Answer 12

series

Question 13

golgi tendon organs are innervated by group ______ afferents

Answer 13

1b

Question 14

conduction velocity depends on ______ and ______

Answer 14

fiber diameter (largest are fastest) and myelination

Question 15

group ____ fibers have the fastest conduction velocity

Answer 15

A