Chapter 10 Part 1

Question 1

Branched striated fibers joined by intercalated discs and involuntarily controlled

Answer 1

Cardiac muscle tissue

Question 2

Spindle shaped non straited fibers located in hollow organs and involuntary control

Answer 2

Smooth muscle tissue

Question 3

Produces movements- stabilize body positions -move substances within body -generates heat; shivering the

Answer 3

Muscle tissue functions

Question 4

Electrical excitability, contractobilty extensibility elasticity

Answer 4

Muscle tissue properties

Question 5

Ability to respond to stimuli I

Answer 5

Electrical excitibilty

Question 6

Ability to contract (shorten)

Answer 6

Contractobilty

Question 7

Ability to stretch

Answer 7

Extensibility

Question 8

Ability to return to original shape

Answer 8

Elasticity

Question 9

A connective tissue that surrounds muscles and consists of 3 layers

Answer 9

Fascia

Question 10

Outer layer surrounds entire muscle

Answer 10

Epinysuim (fascia layer)

Question 11

Middle layer; surrounds fascicles (bundles) of muscle fibers

Answer 11

Perimysium (fascia layer)

Question 12

Inner layer; surrounds individual muscle fibers

Answer 12

Endomysisum (fascia layer)

Question 13

Attach muscles to bones

Answer 13

Tendons

Question 14

Flat sheet like tendon

Answer 14

Appneurosis

Question 15

A muscle fiber consists of smaller muscle fibers known as myofibrlis

Answer 15

Myofiber

Question 16

Consists of the smallest muscle fibers known as thick and thin myofilaments

Answer 16

Myofibrlis

Question 17

Plasma membrane and cytoplasm of muscle cell

Answer 17

Sarcolemma and sarcoplasma

Question 18

Functional units of straited muscle separated by 2 discs

Answer 18

Sarcomeres

Question 19

The darker middle sarea that contains an overlap of both thick and thin filaments

Answer 19

A band

Question 20

The area of each A band containing only thick filaments

Answer 20

H zone

Question 21

The lighter area of sarcomere containing only thin filaments

Answer 21

I band

Question 22

Pass through center of each I band

Answer 22

Z discs

Question 23

Composed of myosin

Answer 23

thick myofilaments

Question 24

Composed of actin

Answer 24

Thin myofilaments

Question 25

Includes myosin and actin

Answer 25

Contractible proteins

Question 26

Include troponin and tropomyosin attached to actin

Answer 26

Regulatory proteins

Question 27

Thick filaments pull on thin filaments sliding them over thick filaments -Z discs move closer together shortening entire muscle

Answer 27

Sliding filament mechanism

Question 28

An enlargement of existing muscle fibers

Answer 28

Hypertrophy

Question 29

A decrease in muscle size may result from disuse or denervation

Answer 29

Atrophy

Question 30

Group of inherited muscle destroying diseases most common in males

Answer 30

Muscular dystrophy

Question 31

Point of contact between neuron and muscle fiber

Answer 31

Neuromuscular junction

Question 32

Gap between cells

Answer 32

Synaptic cleft

Question 33

Chemicals that relay messages to effectors

Answer 33

Neurotransmitter

Question 34

Store neurotransmitters

Answer 34

Synaptic vesicles

Question 35

Region of scarcolemma containing neurotransmitter receptors

Answer 35

Motor end plate

Question 36

Acetylcholine (Ach) releved from synoptic vesicles into synoptic cleft- Ach binds to Ach receptors on moror end of plate opening sodium ion channels -muscle with potential (MAP) is produced as Na+ flows into muscle cell making it more positively charged

Answer 36

Nerve impulse excite skeletal muscle fibers 3 steps

Question 37

In sarcoplasm starts contraction

Answer 37

Increased Ca2+ levels

Question 38

Bonds to troponin, uncovering actin binding sites for myosin

Answer 38

Ca2+

Question 39

Pulls on actin causing contraction cycle (shortening)

Answer 39

Myosin

Question 40

ATP breakdown energizes myosin head

Answer 40

Contraction cycle step 1

Question 41

Long striated fibers attached to bones and volantary control

Answer 41

Skeletal Muscle tissue