1. Each arrow in the diagram represents a different hormone released by the pituitary gland, which then stimulates another gland as indicated. All structures are present in the same organism. The pituitary gland may release hormone 2 when blood pressure drops. Hormone 2 causes gland B to release a different hormone that raises blood pressure which, in turn, stops the secretion of hormone 2. The interaction of these hormones is an example of (1)DNA base substitution (3) a feedback mechanism (2) respiration by osmosis(4) an antigen-antibody reaction

2. Plants use this to breathe!

4. With water guard cells keep stoma open. Without water guard cells close stoma.

6. Sugar enters your bloodstream at small intestine and the level rises. After a while though, the blood sugar level returns to “normal”. WHY?

7. Hormonal Control of Blood Glucose 1.Blood sugar level rises 2.Pancreas produces insulin in response 3.Liver and muscle cells with insulin receptors respond and remove sugar from blood 4.Blood sugar level drops 5.Pancreas stops producing insulin in response and starts to produce glucagon 6.Liver cells with glucagon receptors respond and release sugar back to blood

8. If your body cannot respond to blood sugar levels, this is a disease called Diabetes. In this case, YOU must check your own blood and inject yourself with insulin.