The cell Flashcards
Unit 1
2 Types of Cells
Gainets & Somatic
Gainet cells
Sex sells
Somatic cells
All other cells (non sex cells)
Cell membrane functions
- Physical barrier
- Regulates what enters and leaves the cell
- Cell sensitivity
Cell membrane structure
- Phospholipids
- Proteins
- Carbohydrates
What is a phospholipid
bilayer
2 Types of proteins
Integral & Peripheral
Protein functions
- Act as channel
- Act as receptors
- Identifies
- Attachment
Carbohydrates function
form glucose
Solvent
Dissolver
Solute
What’s being dissolved
Solution
Soute and solvent together
Concentration
Amount of solute per volume of solution
Brownian movement
Random movements of solute
Kinetic energy
energy of movement
Where is kinetic energy found?
Solvents
Types of transport processes
Passive & Active
Types of Passive transport
- Diffusion
- Osmosis
- Filtration
Types of diffusion
Simple & Facilitated
Saturation
to full extent
Passive transport
Doesn’t use ATP
Active transport
uses ATP
What drives diffusion?
Concentration gradient
What moves in diffusion & In what direction
- the solute
- area of high to area of low
Facilitated diffusion
process used for substances that cannot cross the Lipid bilayer due to factors
What factor affect the rate of diffusion
- Size of concentration gradient
- Distance between concentration
- Size of the solute
- Temperature
What drives osmosis
Concentration gradient
What moves in osmosis & in what direction
- water
- area of low to area of high
Toncity terms
- Hypertonic
- Hypotonic
- Isotonic
Hypertonic
Solution that has a higher solute concentration than cell
Hypotonic
Solution that has a lower solute concentration than cell
Isotonic
Solution that has the same solute concentration as cell
What is the net movement of water in a hypotonic solution
Water rushes inside the cell causing it to burst
Lysis
occur when the cell swells and burst
What is the net movement of water in a hypertonic solution
Water rushes out of the cell causing it to shrink
Cremate
cell shrinks
What is the net movement of water in Isotonic solution
There is no net movement
-homeostasis
Types of active transport
ATP pump
Vesicular transport
What is active transport driven by
ATP
Where is ATP pump located
Cells membrane