Chapter 10

Question 1

What types of muscle are striated?

Answer 1

Cardiac and skeletal

Question 2

What types of muscle are involuntary?

Answer 2

Cardiac and smooth

Question 3

What are muscle fascicles wrapped in?

Answer 3

Epimysium

Question 4

What is a fasicle composed of?

Answer 4

Fibers wrapped in perimysium

Question 5

What are muscle fibers wrapped in?

Answer 5

Perimysium

Question 6

What are fibers composed of?

Answer 6

Fibrils wrapped in endomysium

Question 7

What are fibrils wrapped in?

Answer 7

Endomysium

Question 8

What is a myofibril?

Answer 8

Collection of myofilaments

Question 9

Plasma membrane of a muscle cell

Answer 9

Sarcolemma

Question 10

What are muscle cells in regards to nucleuses

Answer 10

Multinucleate

Question 11

Tunnels that travel from sarcolemma through a cell

Answer 11

Transverse tubules

Question 12

Smooth ER of a muscle

Answer 12

Sarcoplasmic reticulum

Question 13

Role of sarcoplasmic reticulum

Answer 13

Store Calcium

Question 14

How many mitochondria are in a muscle cell?

Answer 14

A lot

Question 15

What is the thick filament?

Answer 15

Myosin

Question 16

What is the role of the myosin head?

Answer 16

Bind actin and ATP, pivot to shorten muscle

Question 17

What are thin filaments?

Answer 17

Actin

Question 18

What are the two regulatory proteins?

Answer 18

Troponin and tropomyosin

Question 19

Regulatory protein roles

Answer 19

Regulate contractions through calcium

Question 20

What does actin and myosin binding form?

Answer 20

Crossbridge

Question 21

What does a motor neuron release to cause a muscle contraction?

Answer 21

Acetylcholine

Question 22

What does Ach generate?

Answer 22

Action potential

Question 23

How does the action potential enter the muscle cell?

Answer 23

Travels along sarcolemma and then into T-tubules

Question 24

What does the action potential cause within a cell?

Answer 24

Calcium release

Question 25

What is calcium's role?

Answer 25

Activating regulatory proteins

Question 26

What happens after regulatory proteins are activated?

Answer 26

Actin and myosin cross bridging

Question 27

Causes intended movement

Answer 27

Agonist

Question 28

Opposes intended movement

Answer 28

Antagonist

Question 29

What is the antagonist to the bicept?

Answer 29

Triceps

Question 30

Muscles contract with no change in length

Answer 30

Isometric

Question 31

Muscles shorten as it contracts

Answer 31

Isotonic

Question 32

Muscle tension equals force needed to move

Answer 32

Isometric

Question 33

Muscle tension exceeds load

Answer 33

Isotonic

Question 34

muscle shape where contraction closes a space or passageway

Answer 34

Circular muscle

Question 35

Muscle shape where fibers run parallel to muscle length

Answer 35

Parallel fibers

Question 36

Muscle shape where it is a triangle shape

Answer 36

Convergent

Question 37

Muscle shape that resembles feathers

Answer 37

Pennate

Question 38

What kind of junctions are in cardiac muscle?

Answer 38

Gap junctions

Question 39

What joins cardiac muscle fibers?

Answer 39

Intercalated disks

Question 40

Heart's ability to generate electrical event that leads to contraction

Answer 40

Autorhythmic

Question 41

How is the actin and myosin laid out in smooth muscle?

Answer 41

Like netting