tissues

Question 1

what are tissues 2

Answer 1

• groups of cells that are similar in structure and function
• they represent the next level in structural organisation

Question 2

4 types of tissues

Answer 2

-epithelial, connective, nervous and muscle

Question 3

Epithelial- where to find it 3

Answer 3

lining, covering and glandular tissue of the body

Question 4

Epithelial- functions 4

Answer 4

protection, filtration, absorption and secretion

Question 5

Epithelial- what it does

Answer 5

• provides physical protection and provides sensations e.g touch receptors
• controls permeability (everything that leaves and enters the body must come across an epithelium)
• produces specialized secretions

Question 6

exocrine glands 4

Answer 6

secretions discharged onto the surface of the epithelial tissue e,g digestive enzymes, perspiration on the skin, and milk produced by mammary glands

Question 7

Endocrine glands 2

Answer 7

secretions discharged into surrounding tissues and blood e.g hormones

Question 8

Connective tissue examples

Answer 8

adipose, cartilage, bone, and blood

Question 9

structural elements of connective tissues 6

Answer 9

a) cells
b) fibers
- collagen fibres (strength)
- Reticular fibers (support)
c) ground substance: material that fills up space between cells and fibers

Question 10

1 functions of connective tissues 4

Answer 10

support and protecting:

• provide a structural bony framework
• protect delicate organs
• surround and interconnect other tissue types= bones and cartilage

Question 11

2 functions of connective tissues 3

Answer 11

transporting materials:

-provides the means for transporting dissolved materials from one part of the body to another = blood and lymph

Question 12

3 functions of connective tissues 3

Answer 12

strong energy reserves;

-fats stored in adipose tissues until needed = adipose tissues

Question 13

4 functions of connective tissues 3

Answer 13

defending the body:

-cell to cell interactions and the production of antibodies= white blood cells

Question 14

Muscle tissue 3 types

Answer 14

• skeletal
• smooth
• cardiac

Question 15

skeletal muscle

Answer 15

• striated
• under voluntary control from the nervous system
• contraction of muscle tissue causes bones to move

Question 16

smooth muscle 8

Answer 16

• Line all the hollow structures of the body e.g
• urinary bladder
• respiratory airways
• blood vessels
• digestive
• reproductive
• non striated
• under involuntary controk from NS

Question 17

cardiac muscle

Answer 17

• found only in the heart
• branched and connected cells joining at intercalated discs= conductivity
• specialized pacemaker cells have the principles of automaticity
• striated, involuntary muscle, although NS can alter rate

Question 18

Nervous tissue

Answer 18

specialized for the conduction of electrical impulses=relay info

Question 19

neurons

Answer 19

transmits electrical impulses

Question 20

neuroglia 2

Answer 20

provide physical support, defend from infections, maintain the chemical composition of tissue fluids

Question 21

Organ 2

Answer 21

structure made up of at least 2 types of tissues that perform a specific function of the body e.g stomach

Question 22

organ system

Answer 22

number of organs that work closely with one another to accomplish a common purpose

Question 23

epithelial cells: squamous 6

Answer 23

one layer= diffusion, filtration, secretion in serous membranes.
more than one layer=protection

Question 24

epithelial cells: cuboidal and columnar 6

Answer 24

one layer
secretion and absorption, ciliated types propel mucus or reproductive cells
more than one layer: protection (tissue types are rare)

Question 25

epithelial cells: transitional 5

Answer 25

one layer
no simple transitional epithelium exists
more than one layer: protection, stretching to accommodate distention of urinary structures