Anatomy Quiz Ch. 3

Front 1

Nucleus?

Back 1

the control center of cell activities both metabolic and reproductive

Front 2

Nuclear membrane?

Back 2

bi-lipid membrane

Front 3

Nucleolus (nucleoli)?

Back 3

contain RNA, site of ribosome synthesis

Front 4

Chromatin?

Back 4

stringy, threadlike, consists of nucleo proteins (chromosomes)

Front 5

Microvilli?

Back 5

finger like projections found in the living of the small intestine and in the kidney tubules

Front 6

cilia?

Back 6

hairlike projections, which move fluids along a surface, example respiratory tract- mucus, reproductive system

Front 7

Fagella?

Back 7

threadlike projections that help move the cell, ex. spermcell

Front 8

Tight Junctions?

Back 8

impermeable junctions that bind cells together into leakproof sheets that prevent substances from passing through the extracellular space between cells- adjacent cell membranes fuse

Front 9

Desmosomes?

Back 9

anchoring junctions that prevent cells subjucted to mechanical stress form being pulled apart- thickeningof adjacent membranes and are connecter by fire protein filaments

Front 10

Gap junctions?

Back 10

allow communication between cells, ions can pass directly from cell to cell, connected between cells by connexons(hollow protein cylinders between cell membranes)

Front 11

Physical processes?

Back 11

does not require energy from the cell- moves based on concentration gradient

Front 12

diffusion?

Back 12

movement of molecules from higher to lower concentration; gradient 1. speed affected by size and temperature

Front 13

osmosis?

Back 13

special type of diffusion- diffusion of waterthrough a selectively permeable membrane: moves down or with concentration gradient

Front 14

Facilitated diffusion?

Back 14

diffusion of lecules across the membrane down or with the concentration gradient through a carrier protein

Front 15

Filtration?

Back 15

movement of fluid and solutes through a membrane due to greater pressure on one side of the membrane

Front 16

dialysis?

Back 16

seperation of substances in solution by selectively permeable membranes

Front 17

Physiological (active) process?

Back 17

requires energy expenditure from the cellin the form of ATP- solutes moving against or up the concentration gradient

Front 18

Active transport?

Back 18

protein carriers bring molecules in, ex: Na+/K+ pump

Front 19

Solute pumping?

Back 19

bring in molecules against diffusion pressure and ion concentration