Chapter 2

Question 1

Muscle Spindles

Answer 1

Exist within the contractile fibers (intrafusal)
Sensory
Sense muscle stretch (lengthening and rate of length)
Cause muscle activation (CONTRACTION)

ex. carry groceries and add more, so you contract more
deep tendon reflex (tap knee in MD ofc)

Question 2

Golgi Tendon Organ

Answer 2

Exists within tendons
Sensory
Sense tendon tension (stretch)
Cause muscle inhibition (RELAXATION)
ex.  carry groceries too long, get weaker!

Question 3

Type 1 Muscle Fibers
color
contraction speed
conduction velocity
activity
duration of contraction
fatigue
power
storage

Answer 3

Red
Slow (oxidative phosp. takes a while many steps)
Slow twitch
aerobic (more mitochondria)
Long contraction (back muscle)
Fatigue resistant
Strong, powerful muscle group contraction
triglycerides

Question 4

Type 2 Muscle Fibers
color
contraction speed
conduction velocity
activity
duration of contraction
fatigue
power
storage

Answer 4

White
Fast
Fast twitch
Anaerobic (less mitochondria)
Short (flick with finger)
Easy fatigue
Weak contractions
ATP, creatine phosphate (donates phosphate group)