Muscular System

Question 1

How are muscles named?

Answer 1

Direction, number of origins, location, location of origin and insertion, shape, action, and size of muscles

Question 2

What is weightlifting an example of?

Answer 2

Resistance training

Question 3

What is an extension?

Answer 3

Straightening

Question 4

What is an inversion?

Answer 4

turning the sole of the foot medially

Question 5

What is an abduction?

Answer 5

Moving a limb away from the midline

Question 6

What is an Adduction?

Answer 6

Moving limb toward the midline

Question 7

What are myosin filaments also known as?

Answer 7

Thin filaments

Question 8

What is muscle fatigue caused by?

Answer 8

Oxygen debt

Question 9

What is the origin?

Answer 9

Attachment to a immovable bone

Question 10

What is an insertion?

Answer 10

Attachment to a movable bone

Question 11

What is a prime mover?

Answer 11

muscle with the major responsibility for a certain movement

Question 12

What is a Synergist?

Answer 12

Muscle that aids a prime mover in a movement and helps prevent rotation

Question 13

What is an antagonist?

Answer 13

Muscle that opposes or reverses a prime mover

Question 14

What muscles have striations?

Answer 14

Skeletal and cardiac

Question 15

Where is the I band found?

Answer 15

Thin filaments

Question 16

Where is the A band found?

Answer 16

The entire length of the thick filaments

Question 17

What is a sarcomere?

Answer 17

Contractile unit of a muscle fiber

Question 18

What are Myosin (Thick) Filaments composed of?

Answer 18

Cross bridges heads, ATPase enzymes

Question 19

What are Actin (Thin) Filiments composed of?

Answer 19

Actin protein, anchored to the Z disc

Question 20

What is the H-Zone?

Answer 20

A zone that lacks Actin filaments during rest

Question 21

What is the sarcoplasmic reticulum?

Answer 21

Surrounds the myofibril and stores and releases calcium

Question 22

What is excitability?

Answer 22

Ability to receive and respond to a stimulus

Question 23

What is contractility?

Answer 23

The ability to shorten when an adequate stimulus is received

Question 24

What is extensibility?

Answer 24

Ability of muscle cells to be stretched

Question 25

What is a twitch?

Answer 25

Single, brief contraction

Question 26

What are summing of contractions?

Answer 26

One contraction immediately followed by another

Question 27

What is unfused (incomplete) tetanus?

Answer 27

When some relaxation occurs in between contractions

Question 28

What are fused (complete) tetanus?

Answer 28

No relaxation before contractions, smooth and sustained contraction

Question 29

What is aerobic respiration?

Answer 29

Glucose is broken down to carbon dioxide and water, releasing energy

Question 30

What is anaerobic glycolysis?

Answer 30

Breaks down glucose without oxygen, forms lactic acid

Question 31

What is an isotonic contraction?

Answer 31

Myofilaments are able to slide past each other during contractions which causes muscles to shorten and cause movement

Question 32

What is an isometric contraction?

Answer 32

Tension rises in muscles which makes the muscle unable to shorten and no movement is produced

Question 33

What does Aerobic (endurance) exercise do?

Answer 33

Makes stronger muscles, greater resistance to muscle fatigue, more efficient metabolism, improves digestion and coordination

Question 34

What does isometric (resistance) exercise do?

Answer 34

Increase muscle size and strength