Cells Flashcards Preview

Human Bio > Cells > Flashcards

Flashcards in Cells Deck (9)
Loading flashcards...
0

Golgi Apparatus

Modifies and packages proteins for excretion from the cell

1

Lysosomes

Small spheres containing enzymes that breakdown proteins lipids and other things. Eg gets rid of waste

2

Passive Transport

Diffusion (osmosis)
- simple or facilitated (protein channels)

3

Active Transport

Endocytosis(pinocytosis - liquids. And phagocytosis - solids) - vesicle is formed. Fold of cell membrane around the substance which breaks off and passes through the membrane.

Ion pumps

Exocytosis getting rid of wastes

4

Factors that effect speed of cell transport

Temperature
Concentration gradient
Type of chemical (polar or non polar)
Size of molecule
Alcohol - increases permeability
Thickness of membrane

5

Metabolism

All the chemical reactions that occur in the body

Anabolic - build or add
Catabolic - break down

6

Cell Membrance - Fluid Mosaic Model

Made up of phospholipid bi-layer -

phospholipid hydrophilic phosphate head.

Hydrophobic tail - glycerol and fatty acids

7

Types of Proteins found on cell membrane

Glycoproteins-recognises other cells to form groups

Peripheral - sits inside or outside of membrane not inside

Receptor - recognises hormones

Integral - passes through whole membrane

Non-integral only passes through half

8

Cell Respiration

Anaerobic - Glycolysis - cytoplasm
6 carbon chain broken into two halfs or pyruvate molecules. Produces 2 ATP

Aerobic(uses oxygen in mitochondria)
Krebs Cycle - complex series of catabolic reactions that produces an ATP per pyruvate plus CO2

Electron Transfer Chain - 36 ATP and H20

Overall Reaction
Glucose + Oxygen = carbon dioxide + water + energy