Name: __________________________________________________ Date: _______________________ Period:___________
Human Body Review Part I | Homeostasis, Senses, Nervous & Endocrine System
Levels of Organization & Homeostasis
1. Place the levels of organization in order, from largest to smallest, using the respiratory system as an
example.
_________________>___________________>__________________>___________________>_____________________
2. In what process do stem cells commit to becoming a certain cell type? _________________________
a. What process do they obtain their specialized structures? ______________________________
3. Put the following mixed up steps of a control system in the correct order (from 1 to 5).
________ Target cells react, or change.
________ The nervous system (communication system) sends the message from the control center to
the target cells.
________ Sensory organs/Receptors detect stimuli and gather data.
________ The control center (brain) receives the impulse/message.
________ The nervous system (communication system) sends the impulse/message to the control
center.
4. Draw and or explain an example of each:
--Negative Feedback
+
+
Positive Feedback
5. Feedback loops are important in maintaining _______________________________________.
6. Define thermoregulation: _____________________________________________________________
__________________________________________________________________________________.
7. Why is homeostasis important? ________________________________________________________
___________________________________________________________________________________
__________________________________________________________________________________.
Senses
8. Label the parts of the eye:
a.____________
_____
e.____________
_____
d.______________
f.________________
_
b.____________
_____
c.___________
9. Which part of the eye contains photoreceptors?______
___________________________________________
a. Which photoreceptors detect color? ____________ b. Absence of light?___________________
10. What part of the eye controls the amount of light that enters the eye? _________________________
11. Label the parts of the ear:
d.____________
_____
c.____________
_____
b.________________
a.____________
_____
(3 bones included):
_____________________
_____________________
_____________________
12. What structure carries the impulse to the brain for interpretation (sound)? _____________________
13. Which part amplifies the sound waves? __________________________________________________
14. Where are hair cells located? What do they do? ___________________________________________
___________________________________________________________________________________
15. What do chemoreceptors detect? Where can they be found? ________________________________
___________________________________________________________________________________
16. What structure carries impulses generated in the nose to the brain for interpretation?
___________________________________________________________________________________
The Nervous System
17. Label the parts of a neuron:
b.____________
_____
a.____________
_____
c.____________
_____
d.____________
_____
18. What are the two parts of the Nervous System; what do they consist of?
_____________________________________
&
_______________________________________
19. When a neuron is at rest, it is called the ______________________
________________________.
20. When a neuron is at rest, what is the overall charge inside the cell? ____________________________
a. What is the overall charge outside the cell? _______________________
21. When a neuron as a moving electrical impulse, it is called the _______________ _______________.
22. (Fill in the blanks) During an action potential, ________________(element) rushes in, and
_______________ (element) leaves the cell via sodium/potassium pumps. This changes the charge
from _______________ to _________________ inside the neuron.
23. What is the gap between neurons called? ________________________________________________
24. What happens when an electrical impulse reaches the terminal? What crosses the “gap”? _________
___________________________________________________________________________________
Endocrine System
25. True/False (circle one): The endocrine is a physically connected network of organs.
26. Compare and contrast steroid vs. non steroid hormones.
Steroid
Non-steroid
27. Label the organs of the endocrine system:
28. How do hormones travel? ____________________________________________________________
29. Match the gland with the proper hormone/function:
______ Ovaries
______ Testes
______ Pituitary
______ Thymus
______ Pancreas
______ Thyroid
______ Hypothalamus
______ Adrenal Glands
a. Controls glucose levels in blood. Releases
insulin and/or glucagon (sugars).
b. Stimulates the pituitary glands and controls
growth, reproduction, and body temp.
c. Controls [H2O] in the blood and controls cell
growth.
d. Regulates metabolism.
e. Allows WBC’s to mature.
f. Primarily releases testosterone and is
responsible for male sexual maturity.
g. Releases epinephrine and increases
breathing, alertness, and blood pressure.
h. Primarily releases estrogen and
progesterone; also, regulates female sexual
maturity.
30. You are a Doctor and have a 54 yr. old female patient whose blood glucose levels are not normal. She
is beginning to lose sensation in her feet and toes. She is experiencing a ___________________-term
disruption in homeostasis, where her ________________________(gland) is not functioning properly.
It is likely that this patient has _________________________________(disease).