Tissues 1

Question 1

Name some characteristics of epithelial tissue

Answer 1

It covers surfaces and the cells connect. It separates compartments and the cells define function. They have a diverse range of secondary functions and they can form glands. They also have good adaptive/regenerative powers.

Question 2

Name some characteristics of connective tissue

Answer 2

It is used to connect components. The extracellular matrix and fluid defines the structure and function and it can range from a liquid to solid matrix.
(Blood, bone, adipose)

Question 3

Name some characteristics of muscle tissue

Answer 3

Muscle tissues is contractile due to the cytoplasm of cells being packed with contractile apparatus and made of long thin cells. It shortens lengths and close down spaces.
(Skeletal, smooth, cardiac muscle)

Question 4

Name some characteristics of nervous tissue

Answer 4

It is used for communication and is made up of neurones and support cells. It receives, generates and transmits electrical signals and it integrates information.

Question 5

How does epithelial tissue maintain coverage of surfaces?

Answer 5

It does this through cell to cell and cell to ECM junctions. Desmesomes are adhering junctions and are used for firm anchorage. 
Tight junctions (occlusion) are used to seal intracellular spaces. 
Gap junctions are used for cell to cell communication.

Question 6

What is the basement membrane made up of?

Answer 6

It is made up of basal lamina and reticular lamina.

Basement membrane=BL+RL

Question 7

What are some examples of secondary functions of epithelium?

Answer 7

They are used as cilia which are fingerlike projection from apical surface and microvilli which are the same but found in different places.

Question 8

Describe the classification of epithelia

Answer 8

Simple epithelia is one cell layer thick and is either squamous, cuboidal or columnar.
Stratified is a couple of cells thick and can again be squamous, cuboidal or columnar.
Transitional is a special type of stratified epithelia only found in the urinary bladder because it is protective and impermeant.
Pseudostratified columnar epithelium is found in the trachea (columnar and cuboidal).