Muscels

Question 1

Fascia

Answer 1

A thin sheath of fibrous tissue enclosing a muscle or other organ.

Question 2

Aponeuroses

Answer 2

A pearly white fibrous tissue that takes the place of a tendon in a sheet like muscle having a wide area of attachment.

Question 3

Myofibrils

Answer 3

Of elongated contractile threads found in striated muscle cells

Question 4

Myosin

Answer 4

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

Question 5

Actin

Answer 5

A protein that forms together with myosin the contractile filaments of muscle

Question 6

Striations

Answer 6

A smooth muscle

Question 7

I bands

Answer 7

A pale band across a striated muscle fiber that consist of actin.

Question 8

A band

Answer 8

Band across striations in striated muscles that contain myosin filaments and appear dark under a light microscope.

Question 9

M line

Answer 9

A attachment site for thick filaments. In the center of the A band

Question 10

Sarcomere

Answer 10

A structural unit of a myofibril in striated muscle.

Question 11

Sacroplasmic reticulum

Answer 11

Specialized type of smooth ER that regulates the calcium ion concentration in the cytoplasm of striated muscle cells

Question 12

Transverse tubules

Answer 12

Extension of the sarcolemma that penetrate into the centre of the skeletal and cardiac muscle cells

Question 13

Muscle tone

Answer 13

Is a response to nerve impulses

Question 14

Sustained contraction

Answer 14

Summation and recruitment together

Question 15

Recruitment

Answer 15

An increase in the number of motor units being activated

Question 16

Tetanic contraction

Answer 16

When the resulting forceful sustained contraction lacks even partial relaxation

Question 17

Summation

Answer 17

When there are many stimulus but the muscle only reacts one time is the process of summation

Question 18

Period of relaxation

Answer 18

When it returns to the normal length

Question 19

Period of contraction

Answer 19

The latent period is the muscle pull at its attachment

Question 20

Latent period

Answer 20

The delay between the stimulus and the time it takes for the muscles fiber to respond

Question 21

Twitch

Answer 21

A small contraction that only lasts a fraction of a second

Question 22

Myogram

Answer 22

When the muscle contract it pulls

Question 23

All-or-none response

Answer 23

A muscle will not contract if the contraction has already fully been bone

Question 24

Cisternae

Answer 24

The 2 enlarged portions of the sacroplasmic reticulum near the region where the actin and myofibiril filaments overlap

Question 25

Motor neuron

Answer 25

An axon from a nerve cell that each skeletal muscle fiber connects

Question 26

Neuromuscular junction

Answer 26

The connection between the motor neuron and the muscle fibers

Question 27

Motor end plate

Answer 27

Between the motor neuron and muscle fiber.

Question 28

Neurontransmitter

Answer 28

The cytoplasm at the distal end of the motor neurons axons is rich mitochondria and contains many tiny vesicles

Question 29

Motor unit

Answer 29

A motor neuron and the muscle fibers that it controls constitute a motor unit

Question 30

Troponin, tropoyosin

Answer 30

The protein that are Also a part of the actin filament

Question 31

Sliding filament model

Answer 31

A model to show contraction and relaxation

Question 32

ATPase

Answer 32

An enzyme within the myosin filament.

Question 33

Acetylcholine

Answer 33

When a neurotransmitter stimulated is being contracted

Question 34

Muscle impulse

Answer 34

Diffuses rapidly

Question 35

Acetylcholinesterase

Answer 35

The acetylcholine that stimulates the muscle fibers is rapidly decomposed by this enzyme

Question 36

Creative phosphate

Answer 36

The initial energy available in a contraction within the muscle

Question 37

Hemoglobin

Answer 37

Red blood cells that are holding oxygen

Question 38

Twitch

Answer 38

Brief contractions in the muscle

Question 39

Latent period

Answer 39

A delay between the receipt of a stimulus by a sensory nerve