Muscular System

Question 1

an organ system consisting of skeletal,

smooth and cardiac muscles

Answer 1

Muscular system

Question 2

what stores substances in smooth muscles?

Answer 2

Sphincter

Question 3

movement of food in the 
gastrointestinal tract (GIT)

Answer 3

Peristalsis

Question 4

function of the cardiac muscle

Answer 4

pumps blood`

Question 5

Production of heat as the muscle

contracts

Answer 5

Thermogenesis

Question 6

Involuntary contraction of cells

Answer 6

shivering

Question 7

The ability of the muscular tissue to respond to certain stimuli by producing electrical signals called “action
potentials”

Answer 7

ELECTRICAL EXCITABILITY

Question 8

The ability of muscular tissue to contract
forcefully when stimulated by an action
potential.

Answer 8

CONTRACTILITY

Question 9

The ability of muscular tissue to stretch,

within limits, without being damaged.

Answer 9

EXTENSIBILITY

Question 10

The ability of muscular tissue to return to its
original length and shape after contraction
or extension.

Answer 10

ELASTICITY

Question 11

Are attached to bones by tendons, and they
produce all the movements of body parts in
relation to each other and under voluntary control

Answer 11

SKELETAL MUSCLE

Question 12

another term for subcutaneous layer in skeletal muscle

Answer 12

hypodermis

Question 13

components of the subcutaneous layer

Answer 13

Areolar connective tissue

Adipose tissue

Question 14

Provides entry for nerves and blood vessels

and Insulates muscle and protects from trauma

Answer 14

subcutaneous layer

Question 15

Dense sheet or broad band of irregular
connective tissue
 Lines the body wall and limbs 
 Supports and surrounds muscles and other 
organs

Answer 15

fascia

Question 16

Broad, flat sheet

Answer 16

aponeurosis

Question 17

Outermost layer of connective tissue
 Consist of dense connective tissue
 Encircles the entire muscle

Answer 17

epimysium

Question 18

Dense connective tissue
 Separates group of 10-100 muscle fibers into
FASCICLES

Answer 18

perimysium

Question 19

Inner most layer of connective tissue
 Reticular fiber
 Encircles individual muscle fiber

Answer 19

endomysium

Question 20

how many artery, veins and nerve is the skeletal muscle usually composed of?

Answer 20

1 artery, 1 or 2 veins,

and 1 nerve

Question 21

Neurons that stimulate skeletal muscle

contraction

Answer 21

 Somatic motor neurons

Question 22

do muscular tissue contain capillaries?

Answer 22

yes

Question 23

 Plasma membrane of a muscle cell

Answer 23

SARCOLEMMA

Question 24

Extensions of the plasma membrane that
penetrate to the center of each muscle fiber
 Ensures that action potential excites all parts of
the muscle fiber.

Answer 24

TRANSVERSE TUBULES

Question 25

 The cytoplasm of muscle fiber

Answer 25

sarcoplasm

Question 26

provides oxygen to muscle fiber

Answer 26

myoglobin

Question 27

what is needed for ATP synthesis in a muscle fiber?

Answer 27

glycogen

Question 28

this organelle produces ATP

Answer 28

mitochondria

Question 29

The contractile organelles of skeletal muscle |  Makes the muscle fiber appear striated

Answer 29

myofibrils

Question 30

Encircles each myofibril

Answer 30

SARCOPLASMIC RETICULUM

Question 31

Dilated end sacs of sarcoplasmic reticulum

Answer 31

TERMINAL CISTERNS

Question 32

Basic contractile unit of muscle fiber or basic | functional unit of myofibril

Answer 32

SARCOMERE

Question 33

what myofilaments are present in sacromere?

Answer 33

actin and myosin

Question 34

Thin Filaments: Actin | Thick Filaments: _____

Answer 34

Myosin

Question 35

 Separates one sarcomere from the next

Answer 35

z-disc

Question 36

Darker, middle part of sarcomere  Extends the entire length of thick filament  Has zone of overlap

Answer 36

a band

Question 37

Lighter, less dense area  Contains only thin filaments  Z-disc passes through its cente

Answer 37

I BAND

Question 38

Lies in the center of A band |  Consist only of thick filaments

Answer 38

H-ZONE

Question 39

Located at the middle of the sarcomere |  Holds the thick filaments at the center

Answer 39

M LINE

Question 40

Group of inherited muscle-destroying diseases that cause progressive degeneration of skeletal muscle fibers

Answer 40

MUSCULAR DYSTROPHY

Question 41

Region where communication occurs | between neurons and target cell

Answer 41

Synapse

Question 42

Gap that separates the two cells

Answer 42

 Synaptic cleft

Question 43

The end of a motor neuron

Answer 43

Axon terminal

Question 44

It is the synapse between a somatic motor neuron and a skeletal muscle fiber where muscle action potentials arise

Answer 44

NEUROMUSCULAR JUNCTION

Question 45

Muscular part of the NEUROMUSCULAR JUNCTION

Answer 45

 MOTOR END PLATE

Question 46

delivers the action potential to terminal cisterns

Answer 46

transcerse tubules

Question 47

 recognizes the action potential and delivers | calcium to the sarcoplasm

Answer 47

TERMINAL CISTERNS

Question 48

Produced during muscle relaxation where ATP | production exceeds ATP consumption

Answer 48

CREATINE PHOSPHATE

Question 49

Catalyzes transfer of phosphate group from ATP to creatine, forming creatine phosphate and ADP

Answer 49

CREATINE kinase

Question 50

The entire process by which the breakdown of glucose gives rise to lactic acid when oxygen is absent or at low concentrations

Answer 50

ANAEROBIC GLYCOLYSIS

Question 51

Series of oxygen-requiring reactions (Krebs cycle and electron transport chain) that produces ATP, CO2, water, and heat

Answer 51

AEROBIC GLYCOLYSIS

Question 52

Responsible for muscle soreness

Answer 52

Lactic acid build-up

Question 53

The inability of a muscle to maintain force of | contraction after prolonged activity

Answer 53

MUSCLE FATIGUE

Question 54

Feeling of tiredness and desire to cease the activity Occurs before muscle fatigue  Caused by changes in the CNS

Answer 54

Central Fatigue

Question 55

Refers to added oxygen, over and above the resting oxygen consumption, taken by the body after exercise

Answer 55

OXYGEN DEBT

Question 56

A small amount of tautness or tension in the muscle due to weak, involuntary contractions of motor units.

Answer 56

muscle tone