Densities of Organelles in a Cell

Card 1: What does the phrase "density of Organelle" means?

Density of Organelle

Density of organelle is refering to the abundance of certain organelles found in a cell.

The density of an organelle in a cell is related to the specific function of the cell.

Card 2: Give an example of specific cell where the density of chloraplast is high and suggest a reason for that.

Cells	Reason
Palisade mesophyll cell	To trap sunlight to synthesise carbohydrate during photosynthesis.

(Image created by H McKenna using Inkscape. This file is licensed under the Creative Commons Attribution ShareAlike 2.5 License. The original file can be found in the wikipedia.)

Card 3: Give 3 examples of specific cell where the density of mitochondria is high and suggest a reason for that.

Cells	Reason
Sperm cells	Need energy to move through the uterus towards the Fallopian tubes.
Muscle cells	Contraction of muscle during movement need a lot energy
Meristem Cells	Meristem cells in the plant shoots and roots are involved in cell division to produce new cells for growth. It needs a lot of energy for the activities.

Card 4: Give 2 examples of specific cell that has high density of endoplasmic recticulum and suggest a reason for that.

Cells	Reason
Cells in salivary gland	Active in synthesing and secreting digestive enzyme
Pancreatic Cells	Active in synthesing and secreting hormone and enzyme

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