Muscle

Question 1

Categories of muscle

Answer 1

Striated &Non-striated

Question 2

Types of muscles

Answer 2

Skeletal, cardiac and smooth

Question 3

Examples of striated muscles

Answer 3

cardiac Muscle & Skeletal muscle

Question 4

Skeletal Muscle

Answer 4

• Controlled by CNS
• Voluntary control
• multinucleated

Question 5

Basic unit of a muscle

Answer 5

muscle fiber

Question 6

Example of cardiac muscle

Answer 6

heart

Question 7

Myocardium

Answer 7

muscular layer of the heart

-composed of cardiac muscle

Question 8

Cardiac muscle

Answer 8

• controlled by the ANS
• involuntary contraction
• rectangular in shape
• one central nucleus
• striated

Question 9

Intercalated disc

Answer 9

• Can be seen in cardiac muscle

- specialized junctions between cardiac cells

Question 10

Smooth muscle

Answer 10

• non-striated
• walls of the hollow internal organs such as blood vessels, the gastrointestinal tract, bladder, and uterus.
• involuntary
• under the control of the ANS
• Composed of spindle shaped cells
• centrally placed nucleus

Question 11

Epimysium

Answer 11

CT overing of a muscle

Question 12

Fascicles

Answer 12

subdivisions within the muscle

Question 13

Perimysium

Answer 13

covering of muscle fascicles

Question 14

Endomysium

Answer 14

Covering around individual muscle fiber

Question 15

Sarcolemma

Answer 15

Plasma membrane of a muscle cell

Question 16

Sarcoplasm

Answer 16

The cytoplasm of a muscle cell

Question 17

Muscle Fiber

Answer 17

The muscle cell

Question 18

Myofibril

Answer 18

Longitudinal bundle of myofilaments within a muscle cell

Question 19

Myofilaments

Answer 19

• the contractile protein within a muscle cell

- actin and mysosin

Question 20

Actin

Answer 20

thin filaments

Question 21

Myosin

Answer 21

thick filaments

Question 22

Sarcomere

Answer 22

• The segment that runs from Z line to Z line.
• Both skeletal muscle and cardiac muscle have sarcomeres.
• Smooth muscle has no sarcomeres.

Question 23

A band

Answer 23

darker staining band

Question 24

I band

Answer 24

• The light band.

- made of thin filaments.

Question 25

Z line

Answer 25

runs through the I band

Question 26

M line

Answer 26

runs through the H band

Question 27

H band

Answer 27

bisects the A band

Question 28

Motor unit

Answer 28

A single motor neuron and the aggregation of muscle fibers innervated by that single neuron

Question 29

Motor Neuron

Answer 29

A neuron which innervates a muscle cell

Question 30

Motor end plate

Answer 30

The point of contact where a neuron contacts a muscle

Question 31

Neuromuscular spindle

Answer 31

A receptor which is sensitive to stretching of the muscle

Question 32

Neurotransmitter

Answer 32

the chemical released by a nerveat a synapse

Question 33

Red fibers

Answer 33

- smaller in diameter - more mitochondria - slow-twitch muscle - more resistant to fatigue - more myoglobin - for endurance

Question 34

White fibers

Answer 34

- larger diameter - fast-twitch muscle - store glycogen and use anaerobic metabolism - burst of power