Lesson 26.1 - The Muscular System

Question 1

This system helps the body move from one position to another. It enables movement, keep the body posture, and produces heat.

Answer 1

The Muscular System

Question 2

The Muscular System has three types of muscle.

Answer 2

skeletal, smooth, and cardiac

Question 3

There are more than _______ skeletal muscles in the body.

Answer 3

600

Question 4

They are sually found attached to the bone. Their main function is to contract in order to move bones.

Answer 4

Skeletal Muscle

Question 5

These are known as voluntary or striated muscles. They are innervated by the nervous system.

Answer 5

Skeletal Muscle

Question 6

Skeletal Muscles are known as

Answer 6

Voluntary or striated muscle

Question 7

These allow the contraction of muscles resulting in motion and these are the motor units of the skeletal muscle.

Answer 7

Sarcomeres

Question 8

Repeating units make up a muscle fiber.

Answer 8

Sarcomeres

Question 9

Sarcomeres are composed of

Answer 9

Actin and Myosin

Question 10

Skeletal Muscles has the following structures

Answer 10

Z-line
M-line
H-band
I-band
A-band

Question 11

where actin is connected to

Answer 11

Z-line

Question 12

the attachment point to the thick filaments.

Answer 12

M-line

Question 13

where myosin heads are not present.

Answer 13

H-band

Question 14

thin filaments that do not overlap with thick filaments.

Answer 14

I-bands

Question 15

the thick and thin filaments including the myosin heads.

Answer 15

A-band

Question 16

This is the arrangement of the different components in the sarcomere. This shows the collective action of the different components in order to induce muscular contraction.

Answer 16

The Sliding Filament Model

Question 17

____________ is triggered when ATP hydrolysis occurs.

Answer 17

Contraction

Question 18

Myosin head extends in order to attach to the binding sites found on actin.

Answer 18

Cross bridge cycling

Question 19

It binds to troponin which moves tropomyosin. The binding site becomes exposed.

Answer 19

The role of calcium ions

Question 20

produce movement through contractions.

Answer 20

Agonist

Question 21

assist the agonist in producing the movement.

Answer 21

Synergist

Question 22

muscles whose actions oppose that of the agonist.

Answer 22

Antagonist

Question 23

____________ are muscles that decrease the angle of a body part, ___________ increase the angle.

Answer 23

Flexors, extensors

Question 24

______________ increase the height of a body part, ____________ are muscles that decrease height.

Answer 24

Levators, depressors

Question 25

______________ are muscles that brings a body part toward the body, ___________ bring muscles away from it.

Answer 25

Adductors, abductors

Question 26

_____________ allow twisting of the body part.

Answer 26

Rotators