Study Of Cells

Question 1

Cytology

Answer 1

Study of single body cells and their internal structures, 7 microm - 120 microm, shapes vary

Question 2

General functions of human body cells

Answer 2

Cover external and internal structures
Lining
Storage
Movement
Connection
Defense
Communication
Reproduction

Question 3

Prototypical cell structures

Answer 3

3 basic parts, plasma membrane, cytoplasm, nucleus

Question 4

Plasma membrane

Answer 4

Also cell membrane/plasmalemma, thin, outer border of cell that separates the intracellular and extra cellular fluid compartments

Question 5

Plasma membrane composition and structure

Answer 5

Primarily phospholipid bilayer with proteins interspersed throughout, 2 layers of phospholipids with proteins floating throughout

Question 6

Plasma membrane functions

Answer 6

Communication and select permeability

Question 7

Plasma membrane transport mechanisms

Answer 7

Passive - doesn’t require energy, high concentration to low
Simple diffusion - flow of molecules high to low
Osmosis - water, high to low
Facilitated diffusion - help, high to low, protein channels, big molecules can’t pass so channels help

Question 8

Active transport

Answer 8

Requires energy, low to high, energy comes from ATP
bulk transport - movement of large structures across cell membrane
Exocytosis - movement out the cell, form phospholipid bilayer vesicle, attaches to cell membrane, secretes substance, vesicle forms to other bilayer
Endocytosis - bring substance into a cell
Phagocytosis - forms appendages around molecule, traps and engulfs (cell eating)
Pinocytosis - how we take in liquid, cell drinking, reversal of exocytosis, cell membrane forms pouch, gathered substances form vesicle around, spits substance into cell