Muscle III

Question 1

Extrafusal verses intrafusal fibres: contractile cells of the muscle

Answer 1

Extrafusal

Question 2

Extrafusal verses intrafusal fibres: contractile cells of the muscle spindle

Answer 2

Intrafusal

Question 3

Extrafusal verses intrafusal fibres: responsible for skeletal muscle contraction

Answer 3

Extrafusal

Question 4

Extrafusal verses intrafusal fibres: Adjust sensitivity of muscle to stretch

Answer 4

Intrafusal

Question 5

Extrafusal verses intrafusal fibres: innervated by alpha motor neurons

Answer 5

Extrafusal

Question 6

Extrafusal verses intrafusal fibres: innervated by gamma motor units

Answer 6

Intrafusal

Question 7

Purpose of muscle spindle

Answer 7

Detecting changes in muscle length

Question 8

Components of muscle spindle

Answer 8

Intrafusal fibres, connective tissue, and sensory nerve endings

Question 9

Define plyometrics

Answer 9

Exercises in which muscles exert maximum force in short intervals of time, with the goal of increasing power (“jump training”)

Question 10

Mechanisms of enhancement in plyometrics (3)

Answer 10

1. storage of elastic energy
2. Higher level of initial concentric force
3. Utilization of stretch reflex

Question 11

Define golgi tendon organs

Answer 11

Sensory capsules within tendons

Question 12

Tendon stretch activates….?

Answer 12

GTO

Question 13

GTO stretch reflex inhibits muscle via….

Answer 13

Type 1b afferent neurons

Question 14

Purpose of GTO stretch reflex

Answer 14

Protection against overactivity of muscle