The muscular system

Question 0

Acetylcholine

Answer 0

Is an organic molecule that acts as a neurotransmitter in many organisms, including humans.

Question 1

Abduction

Answer 1

Is a movement which draws a limb out to the side, away from the median sagittal plane of the body.

Question 2

Actin

Answer 2

Is a globular multi-functional protein that forms microfilaments.

Question 3

Action potential

Answer 3

Is a short-lasting event in which the electrical membrane potential of a cell rapidly rises and falls, following a consistent trajectory.

Question 4

Adduction

Answer 4

is a movement which brings a part of the anatomy closer to the middle sagittal plane of the body.

Question 5

Aerobic respiration

Answer 5

A form of cellular respiration that requires oxygen in order to generate energy.

Question 6

Anaerobic glycolysis

Answer 6

is the transformation of glucose to pyruvate when limited amounts of oxygen are available.

Question 7

Antagonist

Answer 7

a muscle that opposes the action of another

Question 8

Aponeuroses

Answer 8

Layers of flat broad tendons.

Question 9

Creatine phosphate

Answer 9

An organic compound of creatine and phosphoric acid; found in the muscles of vertebrates where its hydrolysis releases energy for muscular contraction

Question 10

Dorsiflexion

Answer 10

the movement which decreases the angle between the dorsum of the foot and the leg, so that the toes are brought closer to the shin.

Question 11

Extension

Answer 11

The movement of body structures is accomplished by the contraction of muscles.

Question 12

Fixators

Answer 12

fixed, hence, a muscle which fixes a part.

Question 13

Flexion

Answer 13

the action of bending or the condition of being bent

Question 14

Insertion

Answer 14

a point at which a muscle attaches to a bone.

Question 15

Lactic acid

Answer 15

is produced in the muscles when glucose is broken down during strenuous muscular activity.

Question 16

Motor unit

Answer 16

made up of a motor neuron and the skeletal muscle fibers innervated by that axon.

Question 17

Myofibrils

Answer 17

any of the elongated contractile threads found in striated muscle cells.

Question 18

Myosin

Answer 18

A fibrous protein that forms the contractile filaments of muscle cells and is also involved in motion in other types of cells.

Question 19

Neuromuscular junction

Answer 19

the junction between a nerve fiber and the muscle it supplies

Question 20

Neurotransmitter

Answer 20

a chemical substance that is released at the end of a nerve fiber by the arrival of a nerve impulse and, by diffusing across the synapse or junction, causes the transfer of the impulse to another nerve fiber, a muscle fiber, or some other structure.

Question 21

Origin

Answer 21

the place or point where a muscle, nerve, or other body part arises, in particular.

Question 22

Oxygen debt

Answer 22

a cumulative deficit of oxygen resulting from intense exercise

Question 23

Plantar flexion

Answer 23

the movement which increases the approximate 90 degree angle between the front part of the foot and the shin, as when depressing an automobile pedal or standing on the tiptoes.

Question 24

Prime mover

Answer 24

the muscle that has the most influence in one direction on the joint it acts on.

Question 25

Pronation

Answer 25

a rotational movement of the forearm

Question 26

Supination

Answer 26

Forearm is anterior to the body

Question 27

Synaptic cleft

Answer 27

the small gap, measured in nanometers, between an axon terminal and any of the cell membranes in the immediate vicinity.

Question 28

Synergists tendons

Answer 28

Muscles cooperating with another to produce a desired movement.