The Muscular System

Question 1

Another name for a muscle cell is:

Answer 1

Fiber

Question 2

The contractile unit of the muscle is the:

Answer 2

Sarcomere

Question 3

The purpose of T-tubules is:

Answer 3

To allow electrical impulses to enter the muscle for contraction

Question 4

What are the steps in a muscle contraction?

Answer 4

Vesicles release ACH; ACH binds to motor end plate; action potential travels down sarcolemma into T-tubule; Ca++ released into sarcoplasm; Ca++ binds to troponin; active sites exposed; myosin pulls actin

Question 5

What are characteristics of muscle tissue?

Answer 5

Contractibility, excitability or irritability, and extensibility

Question 6

The type of muscle fiber responsible for quick and forceful contractions of short duration?

Answer 6

White

Question 7

A spastic or hypertonic muscle has:

Answer 7

Excessive tone

Question 8

A flaccid or hypotonic muscle has:

Answer 8

Deficient tone

Question 9

We measure muscle contraction through:

Answer 9

Myography, palpation, and EKG

Question 10

Which muscle fiber contains high amounts of myoglobin and where can this muscle fiber be found?

Answer 10

Slow fibers (red)/in the back, spine, neck

Question 11

Muscle fatigue is caused by:

Answer 11

Lack of ATP, lack of O2, lack of glucose, and lactic acid

Question 12

A tetanus (or tetanic) contraction is:

Answer 12

A smooth and sustained contraction

Question 13

The strength of muscle contraction is influenced by:

Answer 13

Length ofthe muscle when contracting, a negative feedback loop, and fatigue in the muscle

Question 14

Treppe involves:

Answer 14

A step-like increase in strength of contraction following series of twitch contractions

Question 15

Types of muscle contraction that results in a lengthening muscle but no change in tension?

Answer 15

Eccentric

Question 16

Type of muscle contraction that results in no change of length but increasing tension?

Answer 16

Isometric

Question 17

A muscle has maximum strength in which position?

Answer 17

Mid-range

Question 18

The muscle that contributes to the same movement as the prime mover is?

Answer 18

Agonist

Question 19

A hyper-irritable spot of muscle that refers pain to other areas is referred to as?

Answer 19

Trigger point

Question 20

T/F

The mix of muscle fibers in particular muscle can be changed with exercise.

Answer 20

True

Question 21

T/F

Tendons attach muscle to bone.

Answer 21

True

Question 22

T/F

Tendon sheaths contain synovial membrane to enable movement of the tendon.

Answer 22

True

Question 23

T/F

Muscle cells have (mostly) the same structures as a typical cell, but the structures have different names.

Answer 23

True

Question 24

T/F

Skeletal muscle is also known as involuntary muscle.

Answer 24

False

Question 25

T/F

Muscle fibers are long and thread-like.

Answer 25

True

Question 26

T/F

Muscle tissue is responsible for heat reduction in the body.

Answer 26

False

Question 27

T/F

Clients with Duchenne Muscular Dystrophy live a different but full length life.

Answer 27

False

Question 28

T/F

A muscle is made up of either all white, all red, or all intermediate fibers.

Answer 28

False

Question 29

T/F

Endurance training results primarily in increased numbers of myofibrils.

Answer 29

False

Question 30

Aerobic or Anaerobic

Uses O2

Answer 30

Aerobic

Question 31

Aerobic or Anaerobic

Performed in absence of O2

Answer 31

Anaerobic

Question 32

Aerobic or Anaerobic

Produces Lactic Acid

Answer 32

Anaerobic

Question 33

Aerobic or Anaerobic

Results in oxygen debt

Answer 33

Anaerobic

Question 34

Aerobic or Anaerobic

Produces maximum energy

Answer 34

Aerobic

Question 35

Aerobic or Anaerobic

Can produce energy for longer timer

Answer 35

Aerobic