Chapter 10 - Muscle Tissue

Question 0

Which type of muscle is voluntary?

Answer 0

Skeletal muscle

Question 1

What are the 3 types of muscle tissue?

Answer 1

Cardiac, smooth, skeletal

Question 2

What types of muscle are involuntary?

Answer 2

Cardiac, smooth

Question 3

This type of muscle tissue is multinucleated.

Answer 3

Skeletal muscle tissue

Question 4

What type of muscle tissue is not striated?

Answer 4

Smooth muscle tissue

Question 5

What type of muscle tissue has intercalated discs?

Answer 5

Cardiac muscle tissue

Question 6

Muscles have 3 layers of connective tissue, which are ___________.

Answer 6

Epimysium, perimysium, endomysium

Question 7

How does a skeletal muscle fiber form?

Answer 7

Throughout the fusion of numerous myoblasts (mesodermal cells). The cytoplasm s fuse, but nucleuses stay individuals. That’s why muscle tissue is multinucleated.

Question 8

__________ are responsible for muscle contraction.

Answer 8

Myofilaments

Question 9

What are the 2 types of myofilaments?

Answer 9

Thin and thick filaments

Question 10

What are thin myofilaments made out of?

Answer 10

Actin

Question 11

What are thick myofilaments made out of?

Answer 11

Myosin

Question 12

True of false: a triad is made by 1 T tubule and 2 terminal cisternae.

Answer 12

True

Question 13

Myofibrils are made up of bundles of protein filaments called ___________.

Answer 13

Myofilaments

Question 14

How does muscle contraction begin?

Answer 14

Cisternae release Ca^2+ into sarcomeres

Question 15

The cell membrane of a muscle fiber is called _________.

Answer 15

Sarcolemma

Question 16

The cytoplasm of a muscle fiber is called __________.

Answer 16

Sarcoplasm

Question 17

What transmits action potential through muscle cells and allows entire muscle fiber to contract simultaneously?

Answer 17

Transverse tubules (T tubules)

Question 18

_______________ is a membranous structure surrounding each myofibril that helps to transmit action potential to myofibril.

Answer 18

Sarcoplasmic reticulum

Question 19

True or false: the sarcomas mic reticulum is similar in structure to rough endoplasmic reticulum.

Answer 19

False. Similar in structure to smooth endoplasmic reticulum

Question 20

A sarcomere is from _______ to _______.

Answer 20

Z line to Z line

Question 21

Thin filaments form the __ band and thick filaments form the __ band

Answer 21

Thin - I band

Thick - A band

Question 22

_______ are strands of protein that reach from tips of thick filaments to the z line and act to stabilize the filaments.

Answer 22

Titin

Question 23

True or false: the H band has thick filaments but no thin filaments.

Answer 23

True

Question 24

What is the receptor that calcium binds to to initiate muscle contraction?

Answer 24

Troponin

Question 25

During muscle contraction, what happens to the A band, I band, and H band?

Answer 25

H and I bands get smaller, A band remains the same

Question 26

During muscle relaxation, _____ concentrations fall.

Answer 26

Calcium

Question 27

A fixed muscular contraction after death is called _______.

Answer 27

Rigor mortis

Question 28

What is the all or none principle?

Answer 28

As a whole, a muscle fiber is either contracted or relaxed.

Question 29

When ACh is released and binds to receptors, muscle ______ begins.

Answer 29

Muscle contraction

Question 30

When ACh is broken down by AChE, muscle _____ begins.

Answer 30

Relaxation

Question 31

If there is cross-bridge formation and interaction, is muscle contraction or relaxation occurring?

Answer 31

Muscle contraction occurring

Question 32

In muscle contraction, if there is stimulation immediately after relaxation phase, it is called ________.

Answer 32

Treppe

Question 33

If muscles never begin to relax and are in continuous contraction, it is called ________.

Answer 33

Tetanus

Question 34

When there is increasing tension on a muscle, and there is repeated stimulation before the end of relaxation phase, it is called ___________.

Answer 34

Wave summation

Question 35

When twitches reach maximum level of tension and muscle is not allowed to relax, it is called _______.

Answer 35

Incomplete tetanus.

Question 36

Rigor Morris occurs because the body runs out of _______.

Answer 36

ATP

Question 37

_________ is the storage molecule for excess ATP in a muscle cell.

Answer 37

Creative phosphate

Question 38

The primary energy source for resting muscles is aerobic or anaerobic respiration?

Answer 38

Aerobic respiration

Question 39

During the Cori Cycle, the _______ converts lactic acid to pyruvic acid.

Answer 39

Liver

Question 40

Myoglobin is found in slow or fast fibers?

Answer 40

Slow fibers