Endomembrane workesheet answers
1. Label the following parts of the diagram showing the endomembrane system.
1. vesicle
2. hydrolytic enzymes
3. lysosome
4. transport vesicle
5. lipids
6. smooth ER
7. ribosome
8. nucleus
9. rough ER
10. transport vesicle
11. proteins
12. Golgi body
13. cytoplasm
14. secretory vesicle
15. cell membrane
2. Describe how the following structures work together: structure G, structure I, structure
J, structure L, structure N, and structure O.
The ribosome (G), on the rough endoplasmic reticulum (I), produces proteins. The
proteins are then packaged into transport vesicles (J) and sent to the Golgi body (L). At
the Golgi body, the proteins are sorted and repackaged into secretory vesicles (N), which
head to the cell membrane (O). The proteins are secreted from the cell through
exocytosis.
3. Describe how the following structures work together: structure A, structure C,
structure L, and structure O.
A vesicle (A) forms as a result of the invagination of the cell membrane (O). In the
cytoplasm, the vesicle fuses with a lysosome (C) that is produced by the Golgi body (L).
The hydrolytic enzymes of the lysosome break down the contents of the vesicle.
4. Name and describe the two processes that occur at the cell membrane.
1. Process 1: Endocytosis
Description: The cell membrane folds inward and forms a vesicle around some
substances (e.g. solutes, food particles, bacterium, etc.). The vesicle pinches off
and moves into the cytoplasm.
2. Process 2: Exocytosis
Description: A secretory vesicle coming from the Golgi body fuses with the cell
membrane and secretes its contents (e.g. hormones, neurotransmitters, etc.).
adapted from McGrawHill