tissue

Question 1

What is connective tissue composed of?

Answer 1

1) cells
2) extracellular matrix
- -> fibres, ground substance

Question 2

What are some connective tissue cells?

Answer 2

1) Blasts - create matrix
2) clast - break downs ECF
3) cytes - maintain the ECF

Question 3

What are the fibers of connective tissue and how are the classified

Answer 3

1) collagen
2) reticulin
3) elastin

• based on appearance and biochemical characteristics

Question 4

characteristics of collagen

Answer 4

• most common body protein
• tensile strength
• coarse wavy bundles

Question 5

characteristics of Reticulin

Answer 5

fine branched network

Question 6

characteristics of elastin

Answer 6

stretching and returning to its original state

Question 7

What is the classification of fibrous connective tissue

Answer 7

1) loose

2) dense

Question 8

Example of loose CT?

Answer 8

1) Loose ordinary - collagen not organized (aerolar tissue)
2) adipose tissue - storage form of energy and insulation
3) reticular - supporting framework

Question 9

Example of dense CT?

Answer 9

Dense irregular

• -> Collagen > reticulin, elastin
• -> e.g. dermis , fascia

Dense regular

• -> collagen is arranged in 1 direction
• -> tendon, ligament

Question 10

What are specialized connective tissue?

Answer 10

BBC

1) Blood
2) bone (vascular)
3) cartilage (avascular)

Question 11

What is the component of cartilage

Answer 11

• chondrocytes found in pair or 4
• Lacunae(cell membrane) surround the chondrocytes
• ECF: amorphous gel

Question 12

What are the types of cartilage?

Answer 12

1) hyaline cartilage: supports tissue
- -> trachea

2) elastic cartilage: many elastic fibre, allows retention of shape
- ->ear

3) fibrocartilage: many collagen for strength
- ->joint

Question 13

what is the function of amorphous gel?

Answer 13

• strong enuff –> bear weight

- liquid enuff –> allow passage of metabolites

Question 14

What is the different between bone ECF and cartilage ECF?

Answer 14

• bone contains more CA as the ground substance

- cartilage contains more amorphous gel as the ground substance

Question 15

What are the type of bones

Answer 15

1) compact (dense)

2) cancellous (sponge like)

Question 16

What are 3 types of muscle

Answer 16

1. striated voluntary (skeletal)
2. striated involuntary (cardiac)
3. Non-striated involuntary (smooth)

Question 17

Characteristics of striated voluntary?

Answer 17

• cross striation: overlapping of actin and myosin filaments
• long, multi nucleated cells
• voluntary (under conscious control)

Question 18

Where is striated muscle located?

Answer 18

limbs, torso , tongue

Question 19

Characteristics of striated involuntary

Answer 19

• shorter, mononucelus cell joined by intercalated disc (branching)
• highly vascular
• involuntary (ANS)

Question 20

Where is striated involuntary located?

Answer 20

heart

Question 21

Characteristics of smooth muscle

Answer 21

• no cross-striation
• cell spindle shaped, non-branching , central nucleus
• involuntary (ANS)

Question 22

Function of the integumentary system

Answer 22

1) protection
2) thermoregulation
3) synthesis of vit d
4) blood resorvior
5) absorption and secretion
6) sensation

Question 23

What are the 2 main components of the skin

Answer 23

1) epidermis (avascular)

2) dermis (vascular)

Question 24

What is below the dermis ?

Answer 24

hypodermis

Question 25

What is the function of hypodermis?

Answer 25

1) subcutaneous tissue(fat) for insulation
2) LOCT (collagen, elastin)
3) attaches skin to bone/muscle
4) blood vessels, nerves

Question 26

What is the function of dermis

Answer 26

1) DICT (mainly collagen)
2) nerve endings , glands, lymphatics
3) dmg to dermis create stretch marks

Question 27

What is the function of epidermis

Answer 27

1) has 5 layers (strata)

2) presence of melanocytes

Question 28

What is the fxn of melanocytes?

Answer 28

• brown pigment

- protects against UV radiation