Exercises for Chapter 2 Form 4! :D

The structure of and animal cell

Diagram 1

1. Name the structures A to D

   A:_______________________

   B:_______________________

   C:_______________________

   D:_______________________

2. This animal cell has the role of secreting enzymes. Describe th functional relationship between structures A, D and E in the secretion of enzymes.

___________________________________________________________________________

(HOTS)

3. Distinguish between 'tissue' and 'organ'. giving an example of each in an animal cell.

___________________________________________________________________________

Answers:

1. A: RER 

    B: nuclear membrane

    C: mitochondria/mitochondrion

    D: Golgi apparatus

2. The RER, A manufactures and transports proteins which are bound into vesicles and transported to D, the Golgi apparatus. The Golgi apparatus packages, modifies and processes the proteins which are enzymes and send them in secretory vesicle E where it moves towards the plasma membrane and fuses with plasma membrane then releases its contents outside the cell. 

3. - A tissue is a collection of similar cells which performs a similar function. Example: Epithelial tissue.

    - An organ consists of two or more different tissues types working together as a unit, to perform a particular function. Example: Heart.