Tissues

Question 1

Function of epithelial tissue

Answer 1

covers surfaces and separates compartments

Question 2

3 types of cell-cell junctions

Answer 2

desmosomes
tight junctions
gap junctions

Question 3

cell- ECM junction

Answer 3

hemidesmosomes

Question 4

what do desmosomes do

Answer 4

provide firm anchorage

Question 5

what do tight/ occluding junctions do

Answer 5

seal intracellular spaces

Question 6

what do gap junctions do

Answer 6

allow for cell-cell communication

Question 7

3 types of simple epithelial

Answer 7

squamous - thin for easy diffusion
columnar -when ciliated, move mucus
cuboidal- perform secretion and absorption

Question 8

where is simple squamous epithelial found

Answer 8

alveoli and capillaries

Question 9

where is simple cuboidal epithelial found

Answer 9

lining of nephrons

Question 10

where is simple columnar epithelial found

Answer 10

lining of digestive tract

Question 11

3 types of stratified epithelium

Answer 11

squamous - thick, and layers can de sloughed off to allow new growth
columnar - protection and secretion
cuboidal -protection

Question 12

where is stratified squamous epithelial found

Answer 12

epidermis

Question 13

where is stratified cuboidal epithelial found

Answer 13

ducts of sweat glands

Question 14

where is stratified columnar epithelial found

Answer 14

pharynx

Question 15

describe the epithelial componenets of the liver

Answer 15

hepatocytes
arranged in rows between blood vessels
multiple functions including secretion
support epithelial cells line blood vessels and bile ducts

Question 16

describe the epithelial components of the kidney

Answer 16

epithelial cells arranged into nephrons
multiple functions including filtration of the blood, partial absorption of filtrate
support cells blood vessels and renal pelvis which receives toxic urine

Question 17

what are the consequences of abnormal function pf covering and lining epithelial

Answer 17

over/under proliferation
over/under secretion
loss of ciliary beat

Question 18

define the term gland

Answer 18

collections of multi or single cellular secretory epithelial

Question 19

endocrine glands

Answer 19

secrete into blood, e.g. adrenal cortex

Question 20

exocrine glands

Answer 20

secrete to the surface e.g. sweat glands

Question 21

forms of exocrine glands

Answer 21

simple

• tubular
• acinar

compound
-tubuloacinar

Question 22

consequences of abnormal glandular function

Answer 22

over production- pituitary giantism

under production- pituitary dwarfism

Question 23

define connective tissue

Answer 23

tissue which provides general structure, mechanical strength, space filling and physical and metabolic support for tissues

Question 24

4 types of connective

Answer 24

fibres
ground substance
tissue fluid
loose connective tissue

Question 25

what are fibres

Answer 25

collagen makes up 30% of body weight flexible but inelastic with great tensile strength 19types

Question 26

elastic fibres

Answer 26

stretch to 1.5x length and return to original shape tho can be overstretched microfibrils and amorphous component found in sheets yellow in colour

Question 27

what is ground substance

Answer 27

proteoglycans hyaluronic acid glycoproteins

Question 28

what is loose connective tissue

Answer 28

fixed cells - fibroblasts, macrophages, adipocytes, mast cells transient cells- white blood cells

Question 29

consequences of abnormal connective tissue function

Answer 29

- blood/bone marrow = leukaemia - loose/dense = loss/abnormal fibres - cartilage = tare - bone= osteoporosis