Muscle system

Question 1

Muscle cells are surrounded by a connective tissue called the endomysium.

Answer 1

true

Question 2

T/F: The terms mys and sarco refer to muscle.

Answer 2

True

Question 3

T/F: A fascicle is surrounded by connective tissue called perimysium.

Answer 3

true

Question 4

T/F: Groups of fascicles are bundled and surrounded by connective tissue called epimysium.

Answer 4

true

Question 5

T/F: An aponeurosis is a sheet of epithelial tissue.

Answer 5

false

Question 6

T/F: Tendons connect muscle to bone.

Answer 6

true

Question 7

T/F: Organs are made of skeletal muscle.

Answer 7

false

Question 8

T/F: The heart is made of cardiac muscle.

Answer 8

True

Question 9

T/F: A prime mover muscle does the same job as a synergist during a movement.

Answer 9

False

Question 10

T/F: As muscles contract and shorten, they pull on bones and thereby move them.

Answer 10

true

Question 11

T/F: Skeletal muscles need nerve stimulation in order to contract.

Answer 11

true

Question 12

T/F: Skeletal muscle is called involuntary because it is the only type of muscle usually subject to conscious control.

Answer 12

false

Question 13

T/F: Muscles do not produce heat as a by-product of its work.

Answer 13

false

Question 14

T/F: Some muscles are named for their insertions and/or origins.

Answer 14

true

Question 15

T/F: Hinge joints allow for the most movement of any type of joint.

Answer 15

false

Question 16

If an extension is greater than 180 degrees, it is called:

Answer 16

hyperextension

Question 17

Moving a body part away from the midline is:

Answer 17

abduction

Question 18

Moving a part toward the midline is:

Answer 18

adduction

Question 19

A movement that makes the angle between two bones smaller is:

Answer 19

flexation

Question 20

A movement in which your forearm rotates laterally so that the palm faces anteriorly, and the radius and ulna are parallel:

Answer 20

Supination

Question 21

A movement in which your foot lifts so that the superior surface approaches the tibia:

Answer 21

dorsiflexion

Question 22

Generally, all skeletal muscles:

Answer 22

cross at least one joint

Question 23

Muscles have at least ______ attachment sites

Answer 23

2

Question 24

The attachment site of a skeletal muscle which is attached to the less moveable or immovable bone is called:

Answer 24

orgin

Question 25

The attachment site of a skeletal muscle which is attached to the more moveable bone is called:

Answer 25

insertion

Question 26

Skeletal muscle acts by ______, not _________.

Answer 26

Pulling/ Pushing

Question 27

Macroscopically during contraction of skeletal muscle, the _______ moves toward the ____________.

Answer 27

insertion/origin

Question 28

Actin definition

Answer 28

protein that forms thin myofilaments

Question 29

Muscle fiber definition

Answer 29

muscle cell

Question 30

Myosin

Answer 30

protein that forms thick myofilaments

Question 31

Sarcomere

Answer 31

tiny contractile units lined end-to-end in a myofibril

Question 32

Myofibrils

Answer 32

these units fill the sarcoplasm & are made of myofilaments

Question 33

Sarcoplasmic Reticulum

Answer 33

organelle that stores calcium

Question 34

Sarcoplasm

Answer 34

Muscle cell’s cytoplasm

Question 35

Sarcolemma

Answer 35

a muscle cell membrane

Question 36

Crossbridges

Answer 36

small “extensions” located on myosin

Question 37

Neurotransmitter released at the neuromuscular junction by the motor neuron.

Answer 37

Acetylcholine

Question 38

Binds to the regulatory proteins on actin, exposing myosin binding sites

Answer 38

Ca++

Question 39

Provides the energy needed to “re-cock” the myosin crossbridge so it can attach to another actin binding site.

Answer 39

ATP

Question 40

Theory in which actin is said to slide past myosin to shorten a muscle.

Answer 40

Sliding Filament Theory