The Biology Final Exam Review

The final will cover all of the units we have done in the 2

st Semester. It will be about 65-75 questions; you

will have an hour and a half. It will be open note. I would make sure that you get all of the Doodle

Sheets, Gizmos, and other worksheets and activities organized!

-Feedback Loops

-Mitosis/Growth and Development

-Meiosis

-Genetic

-DNA

-Sexual Selection/Population Variation

Feedback Loops

1. Your heart rate speeds up or slows down depending on the needs of the cells in your

body, especially muscle cells. When you are at rest, you heart rate is relatively low but if

you exercise vigorously, your heart rate increases dramatically as the muscles cells need

to main substances to meet the increased energy needs. What two substances do these

cells need? (Feedback Loops Doodle)

Oxygen and Glucose

2. Define: feedback loop. (Feedback Loops Doodle)

The flow of information the ensures the needs of the cell are met

3. Explain how homeostasis work (Feedback Loops Doodle)

Adjuststo change in the internal or external environment and maintains stable conditionsfor its

cell.

4. During exercise, the level of CO2 increases in your blood. What acts as a processor in the

heart rate feedback loop? (Feedback Doodle)

Brain

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