Muscle Tissue - Quiz 1

Question 1

What are 2 features of skeletal muscles?

Answer 1

striated
voluntary control

Question 2

What are 3 features of cardiac muscle tissue?

Answer 2

striated
involuntary
found only in the walls of the heart

Question 3

What are 3 features of smooth muscle?

Answer 3

located in walls of hollow internal structures
lacks striations
involuntary

Question 4

What are the 5 functions of muscle tissue?

Answer 4

motion
stabilizing body position
regulating organ volume
movement of substances within the body
thermogenesis

Question 5

How do muscles contribute to thermogenesis?

Answer 5

muscle contraction and shivering

Question 6

What is a skeletal muscle cell AKA?

Answer 6

muscle fiber

Question 7

What is a muscle cell membrane called?

Answer 7

sarcolemma

Question 8

What is the cytoplasm of a muscle cell called?

Answer 8

sarcoplasm

Question 9

What are fascia?

Answer 9

sheets of fibrous CT deep to skin that surrounds muscles or other organs

Question 10

What is superficial fascia?

Answer 10

areolar CT with nerves and blood vessels destined for muscles.

Question 11

What does adipose tissue in superficial fascia do?

Answer 11

provide heat insulation
mechanical protection to underlying muscles
stores for triglycerides

Question 12

What is deep fascia?

Answer 12

dense, irregular CT that lines the external body wall and holds muscles together in muscle groups.

Question 13

What are the 3 layers of CT that extend from the deep fascia into the muscle to add strength?

Answer 13

epimysium
perimysium
endomysium

Question 14

This dense irregular CT encircles the whole muscle beneath the deeps fascia

Answer 14

epimysium

Question 15

This dense irregular CT surrounds bundles of 10-100 individual muscle cells forming bundles called fascicles.

Answer 15

perimysium

Question 16

This areolar CT separates each muscle fiber tissue from another?

Answer 16

endomysium

Question 17

Narrow cords of dense, irregular CT that joins muscle to the periosteum of bone is called?

Answer 17

tendons

Question 18

What are aponeuroses?

Answer 18

broad, sheet like tendons

Question 19

Each muscle fibre is innervated with what?

Answer 19

One branch of an axon

Question 20

Motor neurons and capillaries supply muscle fibers through what layer?

Answer 20

the endomysium

Question 21

What are T tubules?

Answer 21

perpendicular invaginations of the sarcolemma that penetrate into the cytoplasm.

Question 22

What is the sarcoplasmic reticulum?

Answer 22

a modified endoplasmic reticulum that stores calcium ions for muscle contractions.

Question 23

What 4 things are in the sarcoplasm?

Answer 23

mitochondria
glycogen
myoglobin
myofibrils

Question 24

What creates the striations in muscle fiber?

Answer 24

the arrangement of myofibrils in the muscle fiber

Question 25

What are thick filaments composed of?

Answer 25

myosin

Question 26

What are thin filaments composed of?

Answer 26

actin, troponin and tropomyosin

Question 27

A myofibril consists of these joined end to end in a column?

Answer 27

sarcomeres

Question 28

What are the 3 types of proteins in myofibrils?

Answer 28

Contractile proteins
Regulatory proteins
Structural proteins

Question 29

What are the 2 contractile proteins?

Answer 29

actin and myosin

Question 30

What structural protein allows the sarcomere to return to resting length?

Answer 30

Titin

Question 31

What is the basic functional unit of a muscle?

Answer 31

sarcomeres

Question 32

What separates one sarcomere from the next?

Answer 32

z discs

Question 33

What is the dark line in the middle of the sarcomere?

Answer 33

the M line