Histo module 2B Flashcards Preview

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Flashcards in Histo module 2B Deck (135)
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0

Major protein in M line
A. Myomesin
B. creatine kinase
C. Both
D. None

C

2

The cytoplasm of a muscle is called

Sarcoplasm
Smooth ER- sarcoplasmic reticulum
Cell membrane - sarcolemma

3

Also called visceral muscle
A. Cardiac muscle
B. smooth muscle
C. Skeletal muscle
D. Cardiac and smooth muscle

B

4

What binds individual muscle cells into a single functional mass

External lamina

5

individual nerve fibres branching within the muscle to supply a group of muscle fibres

Motor unit

6

Skeletal muscles are controlled by
A. Small motor nerves
B. medium motor nerves
C. Large motor nerves
D. Mixture of small and large motor nerves

C

7

What do you call muscle fibers that are group together

Fasciculus

8

Muscle fasciculi are surrounded by
A. Endometrium
B. perimysium
C. Epimysium
D. Skin

B
Muscle fiber- endomysium
Whole muscle - epimysium

10

Tendons develop together with skeletal muscles and join muscles to the periosteum of bones through

Myotendinous junction

12

External muscle of the eye have
A. Small fasciculi, small perimysium
B. Small fasciculi, large perimysium
C. Large fasciculi, small perimysium
D. Large fasciculi, large perimysium

B.
for muscles of gross movement - large fasciculi, small perimysium

13

This contain the binding site for myosin
A. F actin
B. G actin
C. Troponin
D. Tropomyosin

B

14

The endomysium is composed of
A. Mainly collagen fibers with elastic fiber
B. mainly collagen fiber with reticular fiber
C. Mainly elastic fiber with collagen fiber
D. Mainly reticular fiber with collagen fiber

D

15

Where is the nuclei of a skeletal muscle seen

Periphery

17

Satellite cells resemble
A. Myoblast
B. myotubes
C. Pericytes
D. Fibroblast

A. Satellite cells are used to regenerate damaged muscle cells

18

Skeletal muscle nuclei in H&E stain is seen as
A. Blue
B. red
C. Green
D. Yellow

A

20

What is composed of extremely elongated, multinucleate contractile cells bound together by collagenous supporting tissue

Skeletal muscle

21

Skeletal Muscle fibers which are a result of regeneration will have
A. Nuclei at the peripheral
B. nuclei at the center
C. Nuclei on top
D. Nuclei below

B

22

Layer of the skin composed of single layer of columnar or cuboidal cell

S. basale

23

Layer of the skin characterized by non nucleated flattened keratinized cell

S. corneum

24

Embryonic origins of muscles

Mesoderm

25

Major protein found on Z line

Alpha actinin

26

True or false. Contraction forces of smooth muscle are SLOW.

True

28

Layer of the skin composed of polyhedral or slightly flattened cell

S. spinosum

29

Shape of a skeletal muscle cell

Cylindrical

31

Hyperplasia is an increase in
A. Muscle strength
B. muscle fiber
C. Muscle contraction
D. Muscle weakness

B. usually occurs in SMOOTH muscles

33

True or false. During contraction, the thick and thin filaments changes their length

False. Neither changes. They slide

35

Also known as axis cylinder

Axon

36

Characteristic feature of cardiac muscles

Intercalated disk

37

Cardiac muscle have _______ compared to skeletal muscle
A. Central nuclei, less dense myofibrils
B. central nuclei, more dense myofibrils
C. Peripheral nuclei, less dense myofibrils
D. Peripheral nuclei, more dense myofibrils

A

38

repetitive functional subunit of the contractile apparatus

Sarcomere