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22 Cards in this Set

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Cytoplasm

The contents of the inside a cell

1. surrounded by a wall of carbohydrates, proteins and phospholipids


2.in a single celled bacterium

Phospholipids

Form around a cell and create Phospholipid Bilayers

1. _____ is a wall surrounding cytoplasm


2. has a head and tail

Phospholipid Bilayer

facing outwards are polar heads and facing inwards are non polar tails

1.surrounds cell


2. provides a structure

Polar

Does not have equally shared electrons

1. _____ and non polar do not mix


2. Faces out on a phospholipid bilayer

Nonpolar

Contains equally shared electrons

1. _____ and polar do not mix


2. Faces in on a phospholipid bilayer

Transport Proteins

Across the entire bilayer which allows big ions and big polar molecules through

1. Receptor proteins and lipids


2. embedded in the membrane

Selective Permeability

Allows some substances through but not others

1. Cell membrane


2. Small molecules can only enter

Glycoproteins

Proteins that are deeply in the membrane and have many sugars attached to them

1. receives chemical messages for other cells


2. outer part of a cell

Glycolipids

Membrane lipids that have sugars attached to the heads

1. receives chemical messages for other cells


2. sugar attached to a glycoprotein is a ________

Fluid Mosaic Model

The structure of the cell membrane that is very flexible

1. membrane structure


2. this structure is very______

Diffusion

how a substance moves when it is down concentration gradient , going from a more to less concentrated area

1.Movement of molecules


2. How smells can travel in a room for example

Concentration Gradient

A substance's concentration differences that ranges over an area

1. Partical movement


2. stores potential energy

Osmosis

How water moves through a semi-permeable membrane, the water with a lower concentration gradient

1. movement of water


2. Form of diffusion

Turgor

the swelling of a cell against its own cell wall the cause is the pressure of the cells contents

1. plant, fungi and bacteria cells have a rigid membrane prevent this


2. Concentration differences can cause this

Isotonic

An equal amount of water inside and outside of the cell

1. water moves in and out of the cell equally


2. Combination of Hypertonic and Hypotonic

Hypotonic

When there is more water outside of the cell then inside

1. could cause the cell to burst


2. water moves in to the cell

Hypertonic

When the is more water inside a cell than outside

1.water diffuses out of the cell


2. the cell could shrivel up after losing the water

Passive Transport

a substance diffused through a membrane

1. No energy required


2. Opposite of active transport

Active Transport

Puts substances contrary with their concentration gradients

1. requires energy


2. the opposite of Passive transport

Facilitated Diffusion

In the membrane,molecules reduce their concentration gradients by using transport proteins

1. A transport system


2. No energy is required

Endocytosis

When the plasma membrane intakes the materials out side a cell

1. used by amoebas or simple multicellular organisms


2. Process of getting food

Exocytosis

When the vesicles fuse with the cell membrane which releases the macromolecule from the cell

1. Waste removal


2. Moves cells in to the external environment