muscle energy and growth lecture 19

how are muscle response controlled

muscle responses can be graded

what is muscle responses can be graded

frequency of stimulation

stimulation strength

increased firing rate does what to the contraction force

greater contraction force based on frequency stimulation

stimulus strength

greater recruitment

what is the energy sources for muscles

Aerobic respiration

Anaerobic respiration

creatine

what is aerobic respiration

require oxygen

95% ATP used

what is anaerobic respiration

does not need O2

less efficient but faster

what is creatine

capture and re-delivers phosphate from ATP

what is the skeletal muscle fiber types

fast twitch

slow twitch

what is fast twitch muscle fiber

stored glycogen

anaerobic respiration

what is slow twitch muscle fiber

many mitochondria

aerobic respiration

how is a damaged muscle fiber repaired

Using a muscle stem fuse.

what is muscle atrophy

degeneration loss of mass.

immobilization

reduced use

lack of neutral stimulation

what disease the motor neuron degeneration

Amyotrophic lateral sclerosis (ALS)