Biology Exam Reveiw

simple diffusion refers to the movement of materials from__

• High to low
• hypertonic to isotonic 
• low to high 
• isotonic to more isotonic 

The most important characteristics  of a cell membrane, specifically to its role in the cell transport is that it is 

• selectively premiable 
• self repairing 
• fluid mosaic model
• hydrophyllic

The main goal of cell transport is to 

• prevent dehydration 
• keep water out of cell 
• reproduce
• maintain homeostasis 

nerve cell use proteins pumps to move calcium, potassium, or sodium ions across the cell membrane. proteins pumps are an example of

• active transport 
• facilitated diffusion 
• osmotic pressure 
• all three of these 

Cell transport refers to the movement of___

• Cell around the body 
• enzymes in reactions
• nerves
• Materials in/out of a cell

the process of active transport requires energy because materials are moving 

• from low to high concentration 
• away from the water 
• out of the cell
• into the cell 

chloraplast are an example of an organelle that is found in only 

• prokaryotes 
• plants 
• fungi
• eukaryotes

In order to carry out the process of endocytosis, which of the following is needed? 

• sodium ions
• calcium 
• ATP adenosine
• DNA

in many cells, the structure that controls the cells activities is the 

• cell membrane 
• mitrocondria
• lysosome
• nucleus 

passive transport includes all of the following except

• simple diffusion
• exosytosis
• osmosis
• facilitated diffusion