Biology Chapter 3
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What are the two things the Plasma Membrane does?
1. It separates a cell from it's environment
2.Enables transfer of information between environment and cell
The plasma membrane is selectively permeable, what does selective permeable mean?
It means that the plasma membrane permits movement of some substances into and out of the cell, but blocks others
The plasma membrane is a lipid bilayer, what are the 4 things it is made up of?
What are phospholipids?
Polar head and nonpolar tail
What does the cholesterol do?
Makes membrane a bit more rigid
What does the proteins do?
Provide means of transport through membrane
What do the Carbohydrates do?
Recognition patterns for cells and organisms
The plasma membrane is non-rigid and Fluid mosaic
What is bulk transport?
It involves membranous vesicles to move larger substances, which are Endocytosis and Exocytosis
What is endocytosis?
Bringing substances to the cell, as substance enters the membrane it is surrounded by a membrane forming a vessel
What is exocytosis?
Expels substances from the cell, substances is contained within a membrane vescile which then fuses with the membrane, releasing the substance to the external environment
What is Glycolysis?
The split into two pyruvate molecules, this occurs in the cytoplasm.
What does the Critic Acid cycle do?
It harvests energy, occurs in mitochondria
Which molecule accepts acetyl CoA is regenerated at the end of one full turn of it?
The Critic Acid Cycle produces what?
Two ATP and four CO2 per glucose molecule
What are ribosomes responsible for?
What do the free ribosomes do?
They synthesize proteins for immediate use in the cell
What do bound ribosomes do?
Synthesize proteins that will be transported to other organelles or exported from the cell
What does the Rough endoplasmic do?
It manufactures proteins, particularly those that will be secreted from the cell
What are the two sources of energy?
What does fat do?
Long-term energy storage in animals, triglycerides
What is glycogen?
it's a storage for carbohydrates, and short-term energy storage in animals.
What would you like to do?
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