Chapter 13 Muscular System

Question 1

The muscular system includes?

Answer 1

Smooth muscle
Cardiac muscle
Skeletal muscle

Question 2

What do the skeletal muscles do?

Answer 2

Support
Movement of bones and other body structures
Protection of the internal organs
Stabilization of joints
Maintenance of constant body temperature.

Question 3

Skeletal muscles work in what pairs?

Answer 3

Origin and insertion.

Question 4

Skeletal muscle fiber contractions include?

Answer 4

Myofibrils and sarcomeres.

Question 5

What is the first part of sliding filament model?

Answer 5

Motor neurons, neuromuscular junctions and sarcolemma.

Question 6

What is the second part of sliding filament model?

Answer 6

Neuromuscular junction and acetylcholine.

Question 7

What is the third part of sliding filament model?

Answer 7

Myosin filaments.

Question 8

Muscles have motor units contractions that includes?

Answer 8

Muscle twitch, summation and tetanus.

Question 9

The number of motor units affects?

Answer 9

Strength like muscle tone.

Question 10

Fuel sources for exercise are?

Answer 10

Glycogen, triglycerides, then glucose and fatty acids.

Question 11

Three ways to attain ATP?

Answer 11

Creatine Phosphate (CP) Pathway, fermentation and cellular respiration.

Question 12

What kind of fibers are there?

Answer 12

Fast-twitch and slow-twitch.

Question 13

What are the different muscle disorders?

Answer 13

Spasms, convulsions, cramps and facial tics.

Question 14

Muscle injuries include?

Answer 14

Strain, sprain and tendinitis.

Question 15

Muscular system diseases include?

Answer 15

Myalgias, muscular dystrophy, myasthenia gravis and sarcomas.