Histology Md1 Block 2 Muscular Tissue

Front 1

contractile unit in muscular tissue is called

Back 1

myocyte

which is also called muscle fiber.

Front 2

The cytoplasm of muscle fibers or cells is called

Back 2

sarcoplasm

Front 3

Specific nomenclature associated with muscle commonly involves the prefix

Back 3

sarco- or myo-:

Front 4

The smooth endoplasmic reticulum of fibers or cells is called

Back 4

sarcoplasmic reticulum.

Front 5

The plasmalemma of fibers or cells is called the

Back 5

sarcolemma

Front 6

***
composite tissues are 3ct =

Back 6

**Epithelial glands

Muscular

Nervous tissues are

Front 7

Classification of muscle

Morphology
two
types

Back 7

A. cross-striations at right angles to long axis
= striated

B. no cross striations = smooth

Front 8

Classification of muscle
Function - two types :

Back 8

A. under voluntary control = voluntary muscle

B. not under voluntary control = involuntary muscle

Front 9

Classification of muscle
3ct

Back 9

Striated voluntary (skeletal) muscle
Smooth involuntary muscle
Striated involuntary (cardiac) muscle

Front 10

Functions of Skeletal muscle:

Back 10

maintain posture

produce motion

Heat production - 85% of body heat is produced by skeletal muscle

Front 11

skeletal muscle 3 layers

Back 11

Epimysium
Perimysium
Endomysium

info

Hint 11

All these connective tissue coatings (endomysium, perimysium and epimysium) contain collagen fibers, elastic fibers, fibroblasts and are richly vascularized.

The ends of skeletal muscles are attached to bones, cartilage or ligaments by means of tendons.

Front 12

Connective tissue arrangements of skeletal muscle

dense connective tissue surrounding the entire muscle. It is continuous with the deep fascia

Back 12

Epimysium

Front 13

The connective tissue around each bundle (fasciculus) of muscle fibers is called the perimysium.

Back 13

Perimysium

Front 14

a delicate layer of connective tissue, the endomysium, composed mainly of a basal lamina and reticular fibers.

Back 14

Endomysium

Front 15

Myo fibril layout

6ct

Back 15

H-band
Z-band
A-band
I-band

M LINE
Z-Sacrcomere-Z

= myofibre

Hint 15

Z to Z is the basic unit is the sarcomere.

Front 16

highly characteristic transverse striations- alternating dark and light areas

Back 16

Sarcoplasm

Front 17

**During embryonic development mesodermal cells differentiate into =

Back 17

uninuclear myoblasts

Front 18

Sarcoplasm also contains the

Back 18

the myoglobin-oxygen binding PROTEIN

Front 19

STAINING myo fibers
They are best demonstrated using an

Back 19

iron-haematoxylin stain.

Front 20

is due to the thick myosin filaments and stays constant

Back 20

A band

Front 21

band is due to the thin actin filaments and varies

Back 21

I band

Front 22

THE STRUCTURE BETWEEN TWO Z-LINES IS CALLED A

Back 22

SARCOMERE

Front 23

THE FUNCTIONAL UNIT OF CONTRACTION is called =

Back 23

SARCOMERE

Front 24

Sarcomere =

(visually equation)

Back 24

½ I + A + ½ I

Front 25

. It marks the gap between the actin filaments as they lie between the myosin filaments

Back 25

H band