Muscle metabolism

Question 1

one motor neuron and all the muscle fibers it intervates or supples

Answer 1

motor unit

Question 2

Motor unit’s response to a single action potential of it motor neuron, contracts quickly the relaxes

Answer 2

muscle twitch

Question 3

No muscle tension, events of e-c coupling

Answer 3

Latent period

Question 4

tension increases, cross bridge cycling

Answer 4

Contraction

Question 5

Ca reentry into SR, tension declines

Answer 5

relaxation

Question 6

Muscle length changes and moves load

Answer 6

isotonic contraction

Question 7

muscle shortens and does work

Answer 7

concentric contraction

Question 8

muscle generates force as lengthens

Answer 8

eccentric contraction

Question 9

Tension to muscle’s peak tension-producing capacity. more load greater than the force the muscle is able to develop

Answer 9

Isometric contraction

Question 10

Many muscle fibers in motor unit, vary strengths of contraction for different demands, proper control of skeletal movement

Answer 10

Graded muscle responses

Question 11

Two stimuli are received by muscle in rapid succession

Answer 11

Wave (temporal) summation

Question 12

Degree of wave summation becomes greater progressing to a sustained contraction- another stimulus applied before muscle relaxes

Answer 12

Unfused (incomplete) tetanus

Question 13

If stimuli frequency increases, muscle tension reacher max, smooth sustained contraction plateau, no relaxion

Answer 13

Fused (complete) tetanus

Question 14

Stimulus is sent to more muscle fibers, leading to more precise control

Answer 14

Recruitment (multiple motor unit summation)

Question 15

No contraction, not strong stimilus

Answer 15

Subthreshold stimulus

Question 16

First observable contraction, not strong stimulus

Answer 16

Threshold stimulus

Question 17

Max contractile force, strongest stimulus

Answer 17

Maximal stimulus

Question 18

glycolysis and lactic acid formation, ATP generated from breakdown of glucose from blood or glycogen stored in muscle, no oxygen, 2 ATP/ glucose

Answer 18

Anaerobic pathway

Question 19

Glucose broken down into 2 pyruvic acid, releasing ATP

Answer 19

Glycolysis

Question 20

In mitochondria, requires oxygen, chemical reactions that break bonds of fuel molecules and release energy to make ATP

Answer 20

Aerobic respiration

Question 21

Length of time muscle contracts using aerobic pathways

Answer 21

Aerobic endurance

Question 22

Muscle metabolism converts to anaerobic pathway

Answer 22

Anaerobic threshold