Chapter 6

Question 0

Acetylcholine

Answer 0

A chemical transmitter substance released by certain nerve endings.

Question 1

Abduction

Answer 1

The movement of a limb or other part away from the midline of the body, or from another part.

Question 2

Actin

Answer 2

A contractile protein

Question 3

Action potential

Answer 3

An electrical event occurring when a stimulus of sufficient intensity is applied to a neuron or muscle cell, allowing sodium ions to move into the cell and reverse the polarity.

Question 4

Adduction

Answer 4

To move toward the midline of the body

Question 5

Aerobic respiration

Answer 5

Respiration in which oxygen is consumed and glucose is broken down entirely; water, carbon dioxide, and large amounts of ATP are the final products.

Question 6

Anaerobic glycolysis

Answer 6

A metabolic process in which glucose is broken down without the use of oxygen.

Question 7

Antagonists

Answer 7

Muscles that act in opposition to an agonist or prime mover.

Question 8

Aponeuroses

Answer 8

Fibrous or membranous sheet connecting a muscle and the part it moves.

Question 9

Creatine Phosphate

Answer 9

Found in muscle fibers but not other cell types

Question 10

Dorsiflexion

Answer 10

Lifting foot towards shin

Question 11

Extension

Answer 11

Increase in angle between bones

Question 12

Fixators

Answer 12

Muscles to immobilize joints

Question 13

Flexion

Answer 13

Decreases the angle between bones

Question 14

Insertion

Answer 14

Moveable attachment of a muscle opposed to its origin

Question 15

Lactic Acid

Answer 15

Product of anaerobic metabolism

Question 16

Motor Unit

Answer 16

Motor neuron and all of the muscle cells it supplies

Question 17

Myofibrils

Answer 17

Contractile organelles found in the cytoplasm of muscle cells

Question 18

Myosin

Answer 18

Principle contractile proteins

Question 19

Neuromuscular junction

Answer 19

Where motor neurons come into close contact with skeletal muscle

Question 20

Neurotransmitter

Answer 20

Chemical released by neurons that may stimulate or inhibit them

Question 21

Origin

Answer 21

Attachment of muscle

Question 22

Oxygen debt

Answer 22

Amount of oxygen required after exercise to oxidize the lactic acid formed during exercise

Question 23

Plantar flexion

Answer 23

Bottom of foot flexed

Question 24

Prime mover

Answer 24

Muscle whose contractions are primarily responsible for a particular movement; agonist.

Question 25

Pronation

Answer 25

The inward rotation of the forearm causing the radius to cross diagonally over the ulna- palms face posteriorly

Question 26

Supination

Answer 26

The outward rotation of the forearm causing palms to face anteriorly

Question 27

Synaptic cleft

Answer 27

The fluid-filled space at a synapse between neurons.

Question 28

Synergists

Answer 28

Muscles cooperating with another muscle or muscle group to produce a desired movement.

Question 29

Tendons

Answer 29

Cord of dense fibrous tissue attaching a muscle to a bone.