Module 8: The Muscular System

Question 1

Skeletal Muscle Tissue

Answer 1

Striated and multinucleate.

Question 2

Cardiac Muscle

Answer 2

Found only in the walls of the heart - it is striated and uninucleate.

Question 3

Smooth Muscle

Answer 3

Found mainly in the walls of hollow organs other than the heart – non-striated and uninucleate.

Question 4

Sarcomere

Answer 4

A single contractile unit of a muscle fibre.

Question 5

Myosin

Answer 5

Thick filaments.

Question 6

Actin

Answer 6

Thin Filaments.

Question 7

Sarcoplasmic Reticulum

Answer 7

Endoplasmic reticulum of muscle cells.

Question 8

Neurotransmitter

Answer 8

Molecule which transmits a signal from a neuron to the cell it is signaling, such as acetylcholine.

Question 9

Refractory Period

Answer 9

The time during repolarization when the muscle fibre cannot be stimulated again.

Question 10

Muscle Tone

Answer 10

Skeletal and smooth muscle remain in a state of continual, partial contraction.

Question 11

Isotonic

Answer 11

Muscle contraction where the muscle changes length and movement occurs.

Question 12

Isometric

Answer 12

Muscle contraction where the muscle does not change length and no movement occurs.

Question 13

Aerobic Respiration

Answer 13

ATP regeneration pathway that requires oxygen.

Question 14

Anaerobic Respiration

Answer 14

ATP regeneration pathway that does not require oxygen.

Question 15

Origin

Answer 15

Point of attachment of a muscle to a stationary bone.

Question 16

Insertion

Answer 16

Point of attachment to a moveable bone.

Question 17

Prime Mover

Answer 17

Main muscle providing force for producing specific movement.

Question 18

Antagonist

Answer 18

Muscle(s) opposing the action of the prime mover.

Question 19

Synergist

Answer 19

Muscle assisting the prime mover through stabilization or adding extra force to the movement.

Question 20

Fixators

Answer 20

Synergist that immobilizes a bone.