Ch 3 Cytology Flashcards Preview

A&P 241 > Ch 3 Cytology > Flashcards

Flashcards in Ch 3 Cytology Deck (23):
1

Cell types

Epithelial
Fibroblasts
Eythrocytes
Skeletal muscle
Smooth muscle
Fat cell
Macrophage
Nerce cell
Gamete

2

Phospholipids

Polar head: hydrophilic
Nonpolar tail: hydrophobic

3

Cholesterol

20% of cell membrane, stablizes membranes by decreasing mobility of phospholipids.

4

Membrane proteins

Integral protein: firmly incerted into lipid bilayer
Peripheral Proteins: Not imbeded in bilayer.Attach loosly to inegral proteins.

5

Cell Junctions

Tight Junctions
Desmosomes
Gap Junctions

6

Passive transport

Does not use ATP:
Difussion
Osmosis

7

Active transport

Uses ATP:
PRIMARY
SECONDARY

8

Vesicular transport

Endocytosis: Phagocytosis, pinocytosis and recepter mediated endocytosis
Exocytosis: Ejecting from cell

9

Membrane Potential

Diffudion causes ionic imballances that polarize the membrane. Active transport maintain membrane potential. Voltage

10

Membrane receptors

Contact signaling: Cells touch
Chemical signaling:receptors involved called Ligands. Neurotransmitters.
G Protein receptors: Middleman or relay to activate

11

Non-menbrane organells

Cytoskeleton, centrioles and ribosomes

12

Menbranous organells

peroxisomes,lysosomes, ER, Golgi apparatus

13

Mitochondria

Power plants, provide ATP supply, has its own DNA

14

Ribosomes

Sites for protein synthesis

15

Rough ER

Stubbed with Ribosomes, proteins thread their way into the ER cisterns

16

Smooth ER

Enzymess catylise these reactions:
Metabolize lipids
Synthesis steroid based hormones
Absorb synthesize and transport fat
Detoxify drugs
Break down stored glycogen

17

Golgi Apparatus

Traffic director. Takes proteins and lipids from ER to modify, package and concentrate them for export

18

Peroxisomes

Contain powerful enzymes to (oxidase and catalase) to detoxify harmful sustances and nuetralize harmful free radicles

19

Lysosomes

Large phagocytes that contain digestive enzymes to dispose of invading bacteria and waste

20

Cilia

Move substances accross cell surface (whiplike eyelashes)

21

Flagella

For perpullsion, found only in sperm

22

Microvilli

Little shaggy hairs, increase surface area

23

Protein synthesis

Transcription
RNA Processing
Translation