Day 4

Question 1

In the graded muscle contraction, muscle tension increases until what happens?

Answer 1

Until it reaches maximal tension

Question 2

In the graded muscle contraction recruitment controls what?

Answer 2

Controls the force of contraction more precisely

Question 3

In graded muscle contraction stimuli that produce no observable contractions are what?

Answer 3

Sub threshold stimuli

Question 4

In graded muscle contraction, the maximal stimulus is the strongest stimulus that does what?

Answer 4

Increases contractile force

Question 5

In grade and muscle contraction, the recruitment process is dictated by what?

Answer 5

Dictated by the size principle

Question 6

In isotonic contractions, muscle tension developed overcomes what?

Answer 6

It overcomes the load and muscle shortening occurs

Question 7

Isotonic contractions can be what two things?

Answer 7

Concentric(muscle shortens) and eccentric (muscle lengthens)

Question 8

Then isometric contraction tension may build to the muscles, peak tension producing capacity, but the muscle does not do what?

Answer 8

It does not shorten or Lengthen

Question 9

ATP supplies the energy for what?

Answer 9

For muscle contraction

Question 10

ATP is regenerated by what?

Answer 10

Direct phosphorylation of ADP by creatine phosphate, anaerobic, glycolysis, and aerobic respiration

Question 11

Direct phosphorylation of ATP by creatine phosphate provides for maximum what?

Answer 11

Maximum muscle power for about 15 seconds

Question 12

Aerobic glycolysis occurs in what

Answer 12

The absence of oxygen

Question 13

What does anaerobic glycolysis do?

Answer 13

It breaks down glucose to two pyruvic acid molecules, releasing enough energy to form small amounts of ATP and producing lactic acid

Question 14

Aerobic respiration requires what

Answer 14

Requires oxygen and mitochondria

Question 15

Aerobic respiration generates what

Answer 15

Large amount of ATP

Question 16

Muscle fatigue is a state of what

Answer 16

Physiological inability to contract

Question 17

Chemical changes involved in muscle fatigue include what?

Answer 17

Include ionic and balances, in organic phosphate, decreased ATP, increased magnesium, and decrease glycogen

Question 18

In muscle fatigue, the extra amount of oxygen that the body must take in for restorative process is called what?

Answer 18

The Excess postexercise, oxygen consumption

Question 19

The force of muscle contraction depends on what?

Answer 19

It depends on the frequency of stimulation the number of muscle fibers required, and the size of muscle fibers and the degree of muscle stretch

Question 20

The velocity and duration of muscle contraction are influenced by what?

Answer 20

They are influenced by muscle fibertype, load, and recruitment

Question 21

Name the three types of Muscle fibers

Answer 21

Slow oxidative fibers, fast oxidative fibers, and fast glycolytic fibers

Question 22

What do slow oxidative fibers do?

Answer 22

Contract slowly, depend on oxygen, Resist fatigue, and have high endurance.

Question 23

What do fast Glycolytic fibers do?

Answer 23

Contract rapidly, use little oxygen, tire quickly, and are suited for short term, rapid movements

Question 24

Fast oxidative fibers are what and have characteristics of what?

Answer 24

They are intermediate and have characteristics of both Glycolytic and slow oxidative fibers

Question 25

Most muscles contain a mixture of fiber types, which gives them a range of what?

Answer 25

It gives them a range of contractile speeds, and fatigue resistance

Question 26

Aerobic exercise results in what?

Answer 26

It results in the increase of the number of capillaries, mitochondria, and myogoblin within the muscle fibers. It also increases endurance, strength, and resistance to fatigue.

Question 27

What resistance exercise results mainly in muscle?

Answer 27

Hypertrophy