muscle fiber types

Question 1

Three fiber types are…

Answer 1

type 1 (slow oxidative )
type IIa (fast oxidative glycolytic)
type IIx (fast glycolytic)

Question 2

Type 1 (slow oxidative)
-size
-color
-amount of myoglobin, mitochondria, capillaries
-type of ATPase
-anaerobic or aerobic ATP generation
-fatigue capacity
-speed of contraction
-type of activities

Answer 2

-small
-red or dark/pink
-A LOT of myoglobin, mitochondria, capillaries
-slow from of ATPase
-Aerobic ATP generation
-very restistant to fatigue
-slow speed of contraction
-endurance activities

Question 3

type IIa (fast oxidative glycolytic)
-size
-color
-amount of myoglobin, mitochondria, capillaries
-type of ATPase
-anaerobic or aerobic ATP generation
-fatigue capacity
-speed of contraction
-type of activities

Answer 3

-intermediate size
-pink color
-moderate amounts of myoglobin, mitochondria, capillaries
-fast form of ATPase
-anarobic and aerobic ATP generation
-more resistant than type IIx
-fast, but slower that type IIx
-good for all activities

Question 4

type IIx (Fast glycolytic)
-size
-color
-amount of myoglobin, mitochondria, capillaries
-type of ATPase
-amount of glycogen/CrP
-anaerobic or aerobic ATP generation
-fatigue capacity
-speed of contraction
-type of activities

Answer 4

-large size
-white color
-few amounts of myoglobin, mitochondria, capillaries
-fast form of ATPase
-A LOT of glycogen/ CrP
-anaerobiv ATP generation
-easily fatigue
-5-6x faster than type I
-speed/power activites