Muscle- Part 3 Flashcards
What is the type of skeletal muscle that is red?
Type 1
What type of skeletal muscle is slow contracting and slow fatiguing fibers?
Type 1
What type of skeletal muscle has a high concentration of blood capillaries= high oxidative capacity?
Ex: muscle used to maintain posture
Type 1
What type of skeletal muscle is intermediate?
Type 2a
What type of skeletal muscle is fast contracting and slow fatiguing? (Between red and white)
Type 2a
What type of skeletal muscle is used for walking?
Type 2a
What type of skeletal muscle that is white?
Type 2b
Why is type 2 skeletal muscle called white?
High glycogen concentration
What type of skeletal muscle is fast contracting, fast fatiguing fibers?
Type 2b
What type of skeletal muscle has a rapid reaction capacity but short duration?
Type 2b
What type of skeletal muscle has few mitochondria and capillaries= low oxidative capacity?
Ex: Muscles used for sprinting
Type 2b
T/F: Most muscles in the body are a mixture of different muscle fiber types
True
What can happen to muscle fibers as a result of training?
Type 2b to Type 2a
What is the group of neuronal cell bodies of all motor units from a single muscle?
Motor neuron pool
What is an Alfa motor neuron and all the skeletal muscle fibers it innervate?
Motor unit
What are the 2 ways contraction strength can be changed by?
Motor unit summation
Wave summation
What is stimulation of a large number of motor unit?
Motor units summation
What is the increase in the frequency of activation of a motor unit?
Wave summation
To adult muscle force, what 2 processes work together?
Motor unit summation and Wave summation
What is the name for after a stimulus causes a contraction, then relaxation?
Twitch
What is it called when 2 stimuli happen in close succession?
Summation- results in stronger twitch
What happens when there are so many stimuli that the muscle isn’t able to relax after contractions?
Tetanic contraction
Whats its called when the contractions get stronger and stronger from a stimuli that’s power stays the same?
Treppe or Staircase
What is it called when individual contractions are fused and cannot be distinguished from each other?
Tetany
