Histology

Question 1

what are the 3 types of cell-cell connections

Answer 1

Gap junctions
Tight junctions
Desmosomes

Question 2

Gap junctions

Answer 2

Hollow protein channels that allow for cell-cell communication

Question 3

Tight junction

Answer 3

Interlocking proteins that form a leak-proof barrier

Question 4

Desmosomes

Answer 4

Sticky glycoprotiens that adhere cells together for structural purposes

Question 5

How are tissues classified?

Answer 5

Cell structure
cell function
extracellular matrix

Question 6

What are the 4 primary tissue types

Answer 6

Epithelial
Connective
Muscle
Nervous

Question 7

What are the characteristics of epithelium

Answer 7

No extra cellular matrix
Polar (different surface)
Basal surface 
Attached to basal surface
Avasucular & innervated
Regenerating: stem cells continually divide to replace surface epithelial cells
Sheets/Layers

Question 8

What are the surfaces of epithelium?

Answer 8

Apical
Lateral
Basal

Question 9

Simple squamous

Answer 9

Function: Diffusion
Location:
-blood & lymph vessles
-Lung alveoli
-Kidney tubules
-Serous membranes

Question 10

Stratified Squamous

Answer 10

Function: protection against abrasion, barrier for water loss/infection
Location:
-Skin (skin)
-Throat, Anus, Vagina (non keratinized)

Question 11

Simple cubodial

Answer 11

Function: Secretion and absorption
Location:
-Kidney tubules
-Glands/ducts

Question 12

Stratified Cuboidal

Answer 12

Function: Secretion, absorption, proctection
Location:
-Ducts of sweat glands and salivary glands

Question 13

Simple columnar

Answer 13

Secretion (stomach, intestine)
Absorption (intestine)
Movement (ciliated cells in bronchioles)

Question 14

Stratified Columnar

Answer 14

Function:
Protection, secretion
Location:
-Larynx
-Mammary gland duct
-Male urethra

Question 15

Pseudostratified Columnar

Answer 15

Function:
-Secretion
-Absorption
-Protection
Location:
-Nasal cavity and sinuses
-Bronchi of lungs
-Trachea

Question 16

Transitional Epithelium

Answer 16

Function:
-expansion and recoil
Location
-Bladder
-Ureters

Question 17

What does exocrine glandular epithelium do?

Answer 17

Releases secretions via ducts

Question 18

What does endocrine glandular epithelium do?

Answer 18

Ductless, release secretions into blood

Question 19

Whats an example of a unicellular exocrine glands

Answer 19

Goblet cell

Question 20

What are the two types of multicellular exocrine glands?

Answer 20

Simple (ducts have no branches)

Compound (ducts have branches)

Question 21

How are the shapes of multicellular exocrine glands specified?

Answer 21

Tubular

Alveolar

Question 22

What are the modes of secretion for multicellular exocrine glands?

Answer 22

Merocrine
Apocrine
Holocrine

Question 23

Merocrine

Answer 23

Secrete products by exocytosis

Question 24

Apocrine

Answer 24

Secretions accumulate near cell surface, pinched off to release product and some cytoplasm

Question 25

Holocrine

Answer 25

Accumulates product, then ruptures to release (even cell fragments)

Question 26

Characteristics of Endocrine glands

Answer 26

Produce horomones Ductless Usually compact and multicellular