Jan 11 Histology

Question 1

four types of tissue

Answer 1

connective, epithelial, muscle and nervous

Question 2

fn of epithelial tissue

Answer 2

covers surfaces (vessels, organs)
line internal passageways
forms glands

Question 3

fn of connective tissue

Answer 3

fills internal spaces and binds organ. protects and supports other tissues. transport materials. stores nrg. provide immunity

Question 4

epithelia covers

Answer 4

internal and external surfaces

Question 5

glands are

Answer 5

structures that produce secretion

Question 6

characteristic of epithelia

Answer 6

closely packed cells with very little ECM. polarity apical= free surface basal surfaces. contain a nerve supply. avascularity. regeneration.

Question 7

microvilli fn

Answer 7

increase SA for absorption or secretion. does not move

Question 8

cilia fn

Answer 8

move materials along epithelial surfaces

Question 9

fn of epithelial

Answer 9

physical protection, control permability, provide sensation, movement within cell, produces specialized secretions

Question 10

classification of epithelial based on layers

Answer 10

simple, pseudostratified, stratified

Question 11

classification of epithelial based on shape

Answer 11

simple, cuboidal, columnar

Question 12

fn of squamous cells

Answer 12

absorption and sloughing. lots of SA

Question 13

fn of cuboidal cells

Answer 13

secretion hormones, water etc lots of ER, golgie and vescicles

Question 14

fn of columnar cells

Answer 14

only cell to have apical structure (cilia and microvilla)
large ER, golgi and vesicles. make and export products eg mucous
movement

Question 15

eg of simple squamous

Answer 15

lung alveoli, lining of blood vessels

Question 16

eg of simple cuboidal

Answer 16

sac which oocytes secrete hormones, lining of stomach, kidneys gallbladder

Question 17

simple columnar epithelia fn

Answer 17

absorption (seen with microvilli) and secretion

Question 18

what are goblet cells

Answer 18

modified columnar cells that produce and secrete mucus. lubricates and protects epithelium

Question 19

pseudostratified ciliated columnar eg

Answer 19

lining of nasal cavity, trachea, portions of male reproductive tract

Question 20

location of transitional epithelia

Answer 20

urinary bladder, renal pelvis, ureters

Question 21

glands are

Answer 21

collection of epithelial cells that produce secretion

Question 22

endocrine fn

Answer 22

secrete directly into blood

Question 23

exocrine fn

Answer 23

secrete into ducts passageway which release onto epithelial surface (sweat, gastric acid)

Question 24

shape of glandular tissues

Answer 24

cuboidal or columnar. either making or exporting products

Question 25

fn of connective tissue

Answer 25

- support and protection - storage of nrg and heat production - movement & transport of material - filer btwn tissues

Question 26

eg of CT support & protection

Answer 26

bones, immune cells

Question 27

eg of CT nrg & heat production

Answer 27

adipocytes

Question 28

eg of CT movement of materials

Answer 28

blood, muscle

Question 29

eg of CT filler

Answer 29

fibroblasts in scar tissue

Question 30

fn and structure of fibroblasts

Answer 30

large flat cells , move through CT and secrete fibers and ground substance

Question 31

structure of collagen fibres

Answer 31

strong flexible bundles of collagen

Question 32

what is the most abundant protein in your body

Answer 32

collagen

Question 33

fn of mast cells

Answer 33

abundant along blood vessels. produce histamine to dilate vessel during inflammation and kill bacteria

Question 34

fn of plasma cells

Answer 34

small cells developed from B lymphocytes. secrete antibodies that attack and neutralize foreign substance

Question 35

ground substance is

Answer 35

material btwn cells and protein fibre. made of H2O, HA, glucosamine etc

Question 36

fn of ground substance

Answer 36

supports cells and fibres, binds them together, provides medium for exchanging substances btwn blood and cell

Question 37

neutrphils are

Answer 37

WBC that migrate to site of infection. phagctyes

Question 38

Eosinophils are

Answer 38

WBC that migrate to parasitic infections and allergic respones

Question 39

elastic fibers are

Answer 39

stretchable but strong fivers made of proteins, elastin and fibrillin

Question 40

macrophages are

Answer 40

develop from monocyte, eat bacteria and cell debris by phagocytosis

Question 41

reticular fibers are

Answer 41

made of collagen and glycoprotein. provide support in blood vessel walls and form branching networks around cells