CELL Flashcards
It is the basic structural and functional unit of life.
Cell
Coined the term “cell”.
Robert Hooke
What are the General Functions of the Cell?
- Cell metabolism and energy use
- Synthesis of molecules
- Co.munication
- Reproduction and Inheritance
What are the Main Regions of the Cell?
Nucleus, Plasma Membrane, and Cytoplasm
It is the control center of the cell.
Nucleus
A blueprint that contains genes.
DNA
It is inside the nucleus; also known as the Nuclear Boundary.
Nuclear Envelope
Small, dark stain.
Nucleolus
Loose network of beads on a string that is scattered throughout the nucleus.
Chromatin
Boundary of the entire cell, encloses the cell.
Plasma Membrane
Whatthe model of plasma membrane that impermeability to most-soluble molecules.
The Fluid Mosaic Model
The gate of the cell.
Glycoprotein
What are the Cell Membrane Junction?
- Tight Junctions
- Desmosomes
- Gap Junctions
Impermeable juctions that encircle the cells and bind them together into leakproof sheets.
Tight Junction
Anchoring junctions forming an internal system of strong “wires” that prevent cells subjected to stress from being pulled apart.
Desmosomes
Function mainly to allow communication (communcating junctions).
Gap Junctions
Hollow cylinders composed of proteins connectong neighboring cells.
Connexons
The cellular material oitside the nucleus but inside the plasma membrane.
Cytoplasm
It is semitransparent.
Cytosol
Chemical fluid that suspends other nutrients or cell products floating in the cytosol elements.
Inclusions
Specialized cellular compartment that are the metabolic machinery of the cell.
Organelles
Powerhouse of the cell; major site for ATP synthesis or production.
Mitochondria
It is a system of fluid-filled tunnels (canals) that coil and twist through the cytoplasm.
Endoplasmic Reticulum
Types of Endoplasmic Reticulum:
Rough ER and Smooth ER
It is membranous tubules and flattened sacs with attached ribosomes.
Rough ER
Are actual sites of protein synthesis in the cell; creates protein.
Ribosomes
No attached ribosomes; manufacture lipids and carbohydrates; detoxifies harmful chemicals; stores calcium.
Smooth ER
Flattened membrane sacs stacked on each other; Modifies, packages, and distributes proteins and lipids for secretion.
Golgi Apparatus
Membrane-bound vesicle pinched off from th3 Golgi apparatus; contains digestive enzymes.
Lysosomes