Biology

4. The movement of ions or molecules across a cell membrane into an area of higher concentration.
5. The process of particles moving from an area with a higher number of particles to an area with a lower number.
6. Fine branching blood vessels that form a network between the arterioles and venules.
9. The measurement of how much exposed area a solid object has.
10. The region of an enzyme where substance molecules bind and undergo a chemical reaction.
12. Organic compounds containing amine and carboxyl function groups.
13. The exposed gills of an animal.

1. The movement of water from a low to high region of concentrated solution though a partially permeable membrane.
2. The tube extending from the larynx to the bronchi.
3. A membrane that is permeable to small molecules of water.
7. High temperatures cause permanent change to the shape of the active site causing the enzyme to be _______.
8. A long relatively thin structure surrounded by blood and capillaries.
11. The movement of substance from a high to low region of concentration.
14. Tiny air sacs in the lungs which allow for gas exchange.