about the functions of different cell organelles
Answers
1. PLASMA MEMBRANE/ CELL MEMBRANE:
Function - the cell membrane separates the cell from its external environment, and is selectively permeable (controls what gets in and out). It protects the cell and provides stability.
2. CYTOPLASM:
Function - Organelles are found here and substances like salts may be dissolved in the cytoplasm.
3. NUCLEUS:
Function - The nucleus is the "control center" of the cell, for cell metabolism and reproduction.
4.ER" OR ENDOPLASMIC RETICULUM:
The Endoplasmic Reticulum is a network of membranous canals filled with fluid. They carry materials throughout the cell. The ER is the "transport system" of the cell.
5.RIBOSOMES:
Ribosomes are small particles which are found individually in the cytoplasm and also line the membranes of the rough endoplasmic reticulum. Ribosomes produce protein. They could be thought of as "factories" in the cell.
6.. GOLGI BODY / APPARATUS
Golgi bodies are stacks of flattened membranous stacks (they look like pancakes!). The Golgi Body temporarily stores protein which can then leave the cell via vesiciles pinching off from the Golgi.
7. LYSOSOMES
Lysosomes are small sac-like structures surrounded by a single membrane and containing strong digestive enzymes which when released can break down worn out organelles or food. The lysosome is also known as a suicide sac.
8. MITOCHONDRIA
The mitochondria are round "tube-like" organelles that are surrounded by a double membrane, with the inner membrane being highly folded. the mitochondria are often referred to as the "powerhouse" of the cell. the mitochondria releases food energy from food molecules to be used by the cell. This process is called respiration. Some cells( muscle cells) require more energy than other cells and so would have many more mitochondria.
9. VACUOLES
Vacuoles are fluid filled organelles enclosed by a membrane. They can store materials such as food, water, sugar, minerals and waste products.