Name: __________________________________________________ Date: _______________________ Period:___________
Human Body | Organization, 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.
Lung Cell
>
Lung tissue
>
Lung
>
respiratory system
2. In what process do stem cells commit to becoming a certain cell type?
a. What process do they obtain their specialized structures?
>
Organism
Determination
Differentiation
3. Put the following mixed up steps of a control system in the correct order (from 1 to 5).
_____5___ Target cells react, or change.
_____4__ The nervous system (communication system) sends the message from the control center to
the target cells.
_____1___ Sensory organs/Receptors detect stimuli and gather data.
____ 3__ The control center (brain) receives the impulse/message.
____ 2__ The nervous system (communication system) sends the impulse/message to the control
center.
4. Draw and or explain an example of each:
-- Negative-- Feedback
5. Feedback loops are important in maintaining
+Positive+ Feedback
Homeostasis.
6. Define thermoregulation: ____Maintaining a constant internal temperature____________________
__________________________________________________________________________________.
7. Why is homeostasis important? _____Our body functions best under specific conditions___________
___________________________________________________________________________________
__________________________________________________________________________________.
The Nervous System
8. Label the parts of a neuron:
Dendrites
Cell Body
Axon
Axon terminal
9. What are the three types of neurons and what is one thing that each does?
a. Sensory neurons can detect pressure (pain, temperature, chemicals etc.)
b. Interneurons can interpret signals from sensory neurons (form memories, control the body)
c. Motor neurons can control the contraction of muscles
Endocrine System
10. True/False (circle one): The endocrine is a physically connected network of organs.
11. Steroids are one type of hormone your body produces. Compare steroids to other types of hormones
in terms of what they do and where they are produced. Give specific examples.
Steroids
Produced by testes/ovaries
Testosterone/Estrogen/Progesterone
Controls sexual development
Hormones
Chemical signals made in glands
Travel through blood
Land on cell receptors
Cause cells to produce proteins
12. Label the organs of the endocrine system:
Hypothalamus
Pituitary
Thyroid
Thymus
Adrenals
Pancreas
Ovaries
Testes
13. How do hormones travel through the body? _________Through the bloodstream____________
14. Match the gland with the proper hormone/function:
__H__ Ovaries
__F__ Testes
__C__ Pituitary
__E__ Thymus
__A__ Pancreas
__D__ Thyroid
__B__ Hypothalamus
__G__ 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