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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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