Exam 1 – Lecture 6: Tissue

Question 1

What are tissues?

Answer 1

A group of cells that perform a function together

Question 2

How do you identify tissue?

Answer 2

Based on its morphology:
Structure
Cytoplasmic/nuclear constituents
Cellular orientation
Adjacent/nearby cells

Question 3

What can adjacent cells tell you about a particular cell?

Answer 3

What the cells look like

Question 4

What does epithelium cover?

Answer 4

Virtually every surface in the body

Question 5

What does epithelium do?

Answer 5

Lives close together
Has directional surfaces
Forms selective barrier

Question 6

What are the different cell layer types?

Answer 6

Simple
Stratified
Pseudostratified

Question 7

What does epithelium lie on?

Answer 7

A connective tissue or basement membrane base

Question 8

What is epithelium named by?

Answer 8

Most mature cell type. Stratified is named by the cells on top

Question 9

What are simple cells?

Answer 9

One layer between connective tissue or basemen membrane base

Question 10

What are stratified cells?

Answer 10

Multiple layers between connective tissue or basemen membrane base

Question 11

What are pseudostratified cells?

Answer 11

They look like they have multiple layer, but they do not

Question 12

What are the different cell shapes?

Answer 12

Squamous
Cuboidal
Columnar
Transitional

Question 13

What are squamous cells like?

Answer 13

Very stretched out

Question 14

What is the cell type of the skin?

Answer 14

Stratified squamous

Question 15

What are cuboidal cells like?

Answer 15

Cube-like

Question 16

What are columnar cells like?

Answer 16

Taller than they are wide

Question 17

What are transitional cells like?

Answer 17

Round

They can stretch out and flatten out

Question 18

Where are transitional cells found?

Answer 18

Lower urinary tract

Question 19

What are the different layer of epithelial polarity?

Answer 19

Apical
Lateral
Basal

Question 20

Where is the apical polarity level?

Answer 20

Next to a lumen

Question 21

What does the lateral polarity level do?

Answer 21

Communicates with cells on either side

Question 22

What does the basal polarity level do?

Answer 22

Connects to the basement membrane

Question 23

What is microvilli?

Answer 23

“finger-like” apical structure that increases the surface area and brushes the border

Question 24

What are the attachment points for microvilli?

Answer 24

Centrioles

Question 25

What is stereocilia?

Answer 25

Apical structure
Subset of microvilli
Unusually long
Immotile microvilli

Question 26

What does stereocilia make up most of?

Answer 26

Male reproductive system

Question 27

What is cilia?

Answer 27

Apical structure
Motile
Move fluid on the surface with synchronous motion

Question 28

What does most cilia contain?

Answer 28

Microtubules (9 in the center, 2 on the inside)