Cells and tissues

Question 1

What are the 4 primary tissues in the body?

Answer 1

1. Epithelial
2. Nervous
3. Muscle
4. Connective

Question 2

What are the classifications of epithelial tissue?

Answer 2

1. Number of cell layers
   Simple (one), Stratified (many)
2. The shape/type of cells
   Cuboidal, Columnar

Question 3

What does nervous tissue do?

Answer 3

Comprises of cells capable of conducting electrical impulses used for communication of information called neurones

and cells that directly/indirectly support the function of neurones called glia

Question 4

What does muscle tissue do and what are the 3 types?

Answer 4

Produces motion by generating contractile force.
1. Smooth
2. Cardiac
3. Skeletal

Question 5

What does connective tissue do and what are the 4 specialised forms of connective tissue?

Answer 5

Cells embedded within an extracellular matrix to hold organs together.

e.g.
1. Ligaments
2. Tendons

Specialized forms:
1. Cartilage
2. Bone
3. Blood
4. Adipose (fat)

Question 6

What can be used to view the scale of structures:
Macroscopic
Microscopic
Ultramicroscopic

Answer 6

Macroscopic - naked eye
Microscopic - light microscope (1,500x)
Ultramicroscopic - electron microscope (500,000x)

Question 7

What is H&E staining?

Answer 7

Haematoxylin and eosin

Haematoxylin (+ve charged) binds to DNA/RNA and stains dark blue

Eosin (-ve charged) binds to basic tissue such as proteins

Question 8

What are the 3 microscopic planes of section for tissues?

Answer 8

1. Cross section
2. Longitudinal section
3. Oblique section