during a physical what do they test your blood for i need a real answer?

Depends on your age. But typical things to check are:

Kidney function

Liver function

Cholesterol indicators

Blood counts (how many RBCs, WBCs, etc)

Sometimes:

Thyroid function (usually have to ask for this if you want it)

Diseases (if they suspect something)

Cancer levels (if you had cancer in the past)

During my last physical, they checked my weight, listened to my heart and lungs, took blood, discussed medications, and talked to me about my general health. My doc doesn't do gyno checks as a rule (he's male and simply doesn't want to). So I see my own gyno for that.

CBC-Complete Blood Count: A CBC is one of the most common types of blood tests and usually requires less than a half teaspoon of blood. Users can find out how the blood is prepared for analysis at the lab, and what the blood reveals about a person’s health.

Virtual Microscope: Users can click and drag slides showing leukemia, anemia, bone marrow, white blood cells, red blood cells and platelets and view them under the microscope.

Blood Chemistries: Blood chemistries test the levels of chemicals in blood. Users learn that blood chemistry is analyzed in a machine because the chemicals in blood cannot be seen under a microscope, and are able to click and drag a test tube to place it in the machine, or click on different words to learn more about the various chemicals.

Blood Culture and Typing: A blood culture is a way of testing for an infection in the blood. A small sample is given to the lab to observe and see if anything grows on the blood sample, just like mold grows on old food in the refrigerator. Users can view a normal blood sample and an infected blood sample.

Blood Types are based on substances found on the surface of red blood cells. There are four different blood types: A, B, AB, and O. Users can check out the breakdown of the blood types of people in the U.S. Users can also move the cursor onto the different blood types to see which are compatible.

Depends somewhat on your history - but in general, cholesterol and lipids, glucose, red and white blood cell counts, key enzymes that could suggest liver damage or muscle damage often caused by prescriptions you may be taking (ALT/AST, CPK).

Hormones levels - Thyroid, etc...

depends on what test are checked off. usually complete blood count, glucose, calcium, kidney and liver enzymes, electrolytes, sometimes cholesterol....look at the requisition and you can search for those tests online=)

Sounds like you're a pot smoker. They check cholesterol, iron for anemia, maybe HIV. If a company is going to insure you, they want to know the risks.

That depends of the type of blood test that they want to do.

http://en.wikipedia.org/wiki/Blood_test

Iron levels to see if your anemic.