Anaphy

Question 1

From what % of our body weight is skeletal muscle.

Answer 1

40% - 50%

Question 2

Delicate connective tissue membrane that covers specialized skeletal muscle fibers.

Answer 2

Endomysium

Question 3

Tough connective tissue binding together fascicles.

Answer 3

Perimysium

Question 4

Coarse sheath covering the muscle as a whole.

Answer 4

Epimysium

Question 5

These three fibrous components may become a tendon or aponeurosis.

Answer 5

Endomysium, Perimysium, Epimysium

Question 6

range from extremely small to large masses.

Answer 6

Size

Question 7

variety of shapes, such as broad, narrow, long, tapering, short, blunt, triangular, quadrilateral, irregular, flat sheets, or bulky masses.

Answer 7

Shape

Question 8

parallel to long axis, converge to narrow attachment, oblique, pennate, bipennate, or curved.

Answer 8

Arrangement

Question 9

point of attachment that does NOT move when muscle contracts.

Answer 9

ORIGIN

Question 10

point of attachment that moves when the muscle contracts.

Answer 10

INSERTION

Question 11

Muscles that contract at the same time as the prime movers and they facilitate movers action to produce a more efficient movement.

Answer 11

SYNERGISTS

Question 12

A muscle or group of muscles that directly performs a specific movement.

Answer 12

PRIME MOVER

Question 13

Most movements are produced by the coordinated action of several muscles, some muscles in the group contract while others relax.

Answer 13

MUSCLE ACTION

Question 14

Muscles that, when contracting, directly oppose prime movers.

Answer 14

ANTAGONIST

Question 15

joint stabilizes.

Answer 15

Fixator muscles-

Question 16

Provide precision and control during contraction of prime movers.

Answer 16

ANTAGONIST

Question 17

Fulcrum lies between the pull and the load. Not abundant in the human body.

Answer 17

FIRST CLASS LEVER

Question 18

Load lies between the fulcrum and the joint at which the pull is exerted.

Answer 18

SECOND CLASS LEVER

Question 19

Pull is exerted between the fulcrum and load.

Answer 19

THIRD CLASS LEVER

Question 20

Unique in that at least one point of attachment is to deep layers of the skin over the face or neck.

Answer 20

Muscle of facial expression

Question 21

Permit rapid and extensive movement.
Most common

Answer 21

THIRD CLASS LEVER

Question 21

Responsible for chewing movement.

Answer 21

Muscles of mastication

Question 22

Paired muscles on either side of the neck are responsible for head movements.

Answer 22

Muscles that move the head

Question 23

Critical importance in respiration.

Answer 23

Muscles of the thorax

Question 24

Arranged in three layers with fibers in each layer running in different directions to increase strength.

Answer 24

Muscles of the abdominal wall

Question 25

Bend to stabilized the back.

Answer 25

Muscles of the back

Question 26

Support the structures in the pelvic cavity.

Answer 26

Muscles of the pelvic floor

Question 27

Muscles that attach the upper extremity to the torso are located anteriorly or posteriorly.

Answer 27

Muscles acting on the shoulder girdle

Question 28

The shoulder is a synovial joint allowing extensive movement in every plane motion.

Answer 28

Muscles that move the upper arm

Question 29

Found proximally to the elbow and attach to the ulna and radius.

Answer 29

Muscles that move the forearm

Question 30

These muscles are located on the anterior or posterior surfaces of the forearm.

Answer 30

Muscles that move the wrist, hand, and fingers.

Question 31

The pelvic girdle and lower extremity function in locomotion and maintenance of stability.

Answer 31

LOWER LIMB MUSCLES

Question 32

Muscles that move the thigh and lower leg.

Answer 32

LOWER LIMB MUSCLES

Question 33

Muscles that move the ankle or foot.

Answer 33

LOWER LIMB MUSCLES

Question 34

Located in the leg and exert their actions by pulling on tendons that insert on bones in the ankle and foot.

Answer 34

Extrinsic foot muscles

Question 35

Responsible for dorsiflexion, plantar flexion, inversion, and eversion.

Answer 35

Extrinsic foot muscles

Question 36

Located within the foot and responsible for flexion, extension, abduction, and adduction of toes.

Answer 36

Intrinsic foot muscles

Question 37

body alignment that most favors functions and requires the least muscular work to maintain and keeping the body’s center of gravity over its base.

Answer 37

GOOD POSTURE

Question 38

Movement of the body as a whole or of its part. Heat production. Posture

Answer 38

MUSCULAR PHYSIOLOGY

Question 39

ability to stimulate.

Answer 39

Excitability

Question 40

ability to contract, or shorten, and produce body movement.

Answer 40

Contractility

Question 41

ability to extend, or stretch, allowing muscles to return to their resting length.

Answer 41

Extensibility

Question 42

Muscle cells are called _____ because of their threadlike shape.

Answer 42

FIBERS

Question 43

plasma membrane of muscle fibers.

Answer 43

Sarcolemma

Question 44

Network of tubules and sacs found within muscle fibers.

Answer 44

Sarcoplasmic Reticulum

Question 45

This continually pumps CALCIUM IONS from the sarcoplasm and stores the ions within its sac.

Answer 45

Sarcoplasmic Reticulum

Question 46

numerous fine fibers packed close together in sarcoplasm.

Answer 46

MYOFIBRILS

Question 47

A segment of myofibril between 2 successive Z lines.

Answer 47

SARCOMERE

Question 48

Dark stripes called

Answer 48

A BANDS

Question 49

zone runs across midsection of each dark A bands.

Answer 49

Light H

Question 50

Light Stripes called

Answer 50

I bands.

Question 51

line extends across center of each light I band.

Answer 51

Dark Z

Question 52

Transverse tubules extend across the sarcoplasm at right angles to the long axis of the muscle fibers.

Answer 52

T TUBULES

Question 53

Formed inward extensions of the sarcolemma.

Answer 53

T TUBULES

Question 54

Membrane has ion pumps that continually transport Calcium Ions inward from the sarcoplasm.

Answer 54

T TUBULES

Question 55

Allow electrical impulses travelling along the sarcolemma to move deeper into the cells.

Answer 55

T TUBULES

Question 56

\Each myofibril contains thousands of thick and thin myofilament ```

Answer 56

MYOFILAmENTS

Question 57

Makes up almost all the thick filament.

Answer 57

Myosin

Question 58

“Heads” are chemically attracted to actin molecules.

Answer 58

Myosin

Question 59

“heads” are known as cross bridges when attached to actin.

Answer 59

Myosin

Question 60

Globular protein that forms two fibrous strands twisted around each other to form the bulk of the thin filament.

Answer 60

ACTIN

Question 61

Protein that blocks the active sites on the actin molecules.

Answer 61

TROPOMYOSIN

Question 62

Protein that holds tropomyosin molecules in place.

Answer 62

TROPONIN

Question 63

A skeletal muscle fiber remains at rest until stimulated by a motor neuron.

Answer 63

Excitation and Contraction

Question 64

motor neurons connect to the sarcolemma at the motor end plate.

Answer 64

Neuromuscular Junction

Question 65

The neurotransmitter released into the synaptic cleft that diffuses across the gap, stimulates receptors and initiates an impulse in the sarcolemma.

Answer 65

Acetylcholine

Question 66

that a muscle can develop bears a direct relationship to the initial length of its fiber.

Answer 66

Maximal strength

Question 67

are compressed, therefore the muscle cannot develop much tension.

Answer 67

A shortened muscle’s sarcomeres

Question 68

Contraction in which the one or tension within a muscle remains the same as the length of the muscle changes.

Answer 68

Isotonic Contraction

Question 69

muscle shortens as it contracts.

Answer 69

Concentric

Question 70

muscle lengthens while contracting.

Answer 70

Eccentric

Question 71

Contraction in which muscle length remains the same while the muscle tension increases.

Answer 71

Isometric contraction