Cells Flashcards
1
Q
Cell membrane structure
A
- Phospholipid bylayer
- Contains protein for strength and transport & receptors
- Has carbs to assist in membrane structure
- Cholesterol for membrane strength
2
Q
Cell membrane function
A
- Thin structure that separates internal components from external environment
- Selectively permeable
- flexible boundary
- Facilitates contact with cells
3
Q
Selectively permeable membrane
A
Membrane allows certain substances to pass through the membrane or transporter proteins
4
Q
Extracellular fluid
A
- found in spaces between cells
* found in blood and lymph vessels
5
Q
Intracellular fluid
A
- Found in living cells
- 66% of body’s water
- Mostly water
6
Q
Diffusion
A
• passive transport
process
Movement of molecules from a higher area of concentration to a lower area of concentration
7
Q
Osmosis
A
•Passive transport process
Movement of water molecules from a high concentration to low concentration through a selective permeable membrane
8
Q
Facilitated diffusion
A
- passive transport process
- Like diffusion but needs protein carrier in the cell membrane
- moves Large molecules and charged atoms
9
Q
Dialysis
A
- passive transport process
- Diffusion of small particles
- Through a selectively permeable membrane resulting in separation
10
Q
Filtration
A
- Passive transport process
- Removing particles by passing through a filter
- Controlled by gravity or pressure
11
Q
Phagocytosis
A
- Active transport process
* A form of endocytosis in which cells take larger solid particles
12
Q
Exocytosis
A
- Active transport process
- The cell removing a larger particles
- Used during secretion when the cells send out new hormones or Neurotransmitters
13
Q
Active transport
A
- Active transport process
- Use energy in ATP
- requires a protein carrier in membrane
- moves ion against a concentration low to high
- Na/K pump
14
Q
Hypotonic osmosis
A
Cell swells
15
Q
Hypertonic osmosis
A
Cell shrinks
