1. The cell membrane is composed of a phospholipid bilayer with embedded proteins.
2. Phospholipids have hydrophilic heads facing the aqueous environments inside and outside the cell, and hydrophobic tails facing inward.
3. Proteins within the membrane serve various functions, including transport (transport proteins) and signaling (receptors with carbohydrate chains).
4. Carbohydrate chains attached to proteins or lipids on the outer surface form the glycocalyx, important for cell recognition.
5. The fluid mosaic model describes the membrane as a dynamic structure where components can move laterally.
6. The animal cell diagram shows organelles like the nucleus, mitochondria, endoplasmic reticulum, Golgi apparatus, lysosomes, and vacuoles, all surrounded by the cytoplasm and enclosed by the cell membrane.
7. The centrosome, containing centrioles, is involved in organizing microtubules during cell division.
8. Ribosomes, either free in the cytoplasm or bound to the rough ER, synthesize proteins.
9. Mitochondria are the site of cellular respiration, producing ATP.
10. The smooth ER synthesizes lipids and detoxifies substances, while the rough ER modifies and transports proteins.
11. The Golgi apparatus modifies, sorts, and packages proteins for secretion or delivery to other organelles.
12. Lysosomes contain digestive enzymes to break down waste materials and cellular debris.
13. Vacuoles store nutrients, ions, and waste products; in animal cells, they are typically smaller than in plant cells.
14. The cytoskeleton provides structural support and facilitates intracellular transport and cell movement.
15. The cell membrane regulates the passage of substances into and out of the cell, maintaining homeostasis.
Parent Tip: Review the logic above to help your child master the concept of cell membrane coloring worksheet key.
