Honors Biology
Name___________________________________
28.2 and 33.1 Quiz Review Sheet
Date___________________________ Per______
Directions: On separate paper, write down KTs and definitions that you would categorize as “Think you
know/don’t know at all”. Then, answer questions 1-11. Do the same thing for the skeletal system key terms, and
then fill in the bones you should know on the back of this sheet.
28.2 Key Terms
homeostasis, feedback, positive feedback, negative feedback, control systems (sensors, control center,
communication systems, targets), insulin, glucagon, Type II diabetes
1. Homeostasis can be broken into two parts: homos, meaning “similar,” and stasis, meaning “standing” or
”stopping.” Write a brief definition of homeostasis based on the meaning of these two parts.
2. The word feedback originally comes from the field of electrical engineering. Feedback occurs when part of a
signal put out by an amplifier returns to its source. It’s that loud squeal you sometimes hear when someone is
using a microphone. Explain how this meaning of feedback relates to what happens in a feedback loop.
3. Your body has control systems that keep its internal conditions within the narrow ranges that support life. On a
hot day, how do your body’s control center and sensors work together to help you stay cool?
4. Your body has many feedback loops to help maintain homeostasis. Explain the difference between a negative
feedback loop and a positive feedback loop.
5. Explain how the failure of one organ can lead to the failure of other organs or of an entire organ system.
6. When glucose levels in the blood rise above a set point, hormones are released that cause the glucose levels to
decline. Is this process an example of a positive or a negative feedback loop? Explain your answer.
7. Give two examples of what can happen to a person if the body’s homeostasis is not maintained.
8. Describe which organ systems you think would be involved in maintaining homeostasis when a person gives a
major speech or presentation. Include what may be happening within the person just before, during, and after
the speech.
9. For various specialized cells to work together, they must communicate with one another. Use the information
you learned in Chapter 3 about cell parts to describe how you think a neuron might communicate with a
muscle cell.
10. Explain how the difference between negative and positive feedback makes negative feedback more effective in
maintaining homeostasis in the body.
11. People with weak or damaged hearts often have trouble regulating their body temperatures in a hot or a cold
environment. Explain why an impaired heart might make a person less able to maintain homeostasis.
33.1 Key Terms
skeletal system, appendicular skeleton, , axial skeleton, vertebrae, cartilage, joint (fibrous, cartllaginous, synovial,
hinge, ball-and socket, saddle, gliding, pivot), ligament, calcification, compact bone (osteocytes and Haversian canals),
spongy bone (yellow and red marrow)
Make sure you study your HW questions again from the 33.1 Study Guide.
Label the following bones in the correct locations: Cranium, Clavicle, Humerus, Radius, Ulna, Carpals, Metacarpals,
Phalanges (fingers), Sternum, Pelvic girdles, Femur, Patella, Tibia, Fibula, Tarsals, Metatarsals, Phalanges (toes)
Briefly describe where and how each type of synovial joint moves (gliding, pivot, ball-and-socket, saddle, hinge)