Review for Unit 9 and Unit 10 Test
1. Name and define the 2 ways food is
broken down by the diges ve system.
" Mechanical diges on
breaks food down
physically.
" Chemical diges on uses
enzymes (diges ve juices)
to breaks food down.
2. What is the main func on of the
diges ve system?
" The main
func on of the
diges ve system
is to breaks
food down into
nutrients the
body can use.
3. What elements are found in organic
compounds?
" Mnemonic Carbon SHOPN
" Carbon
" Sulfur
" Hydrogen
" Oxygen
" Phosphorous
" Nitrogen
4. List the forms of energy.
" Radiant (light) energy
" Chemical energy
" Thermal (heat) energy
" Mechanical energy
" Kine c energy
" Poten al energy
5. Name the type of energy conversion
occurring in each of the following:
" Energy from the sun used in
photosynthesis:
radiant (light) to chemical
" Energy from food turned into fat:
chemical to chemical
" energy from food used by an organism to
keep warm:
chemical to thermal
6. The body breaks down
carbohydrates into what substance?
" Carbohydrates are broken down by
saliva (amylase) in the mouth into
starches and sugar.
7. The body breaks down proteins into
what substance?
" proteins are broken down into
amino acids.
8. State whether the following is a
chemical change, physical change or both.
a. Interac on of food with bile Chemical
b. Movement of food during peristalsis Physical
Physical
c. Chewing food
d. Chewing food and mixing of food with saliva (amylase)
Both
e. Reac on of food with stomach acids
Chemical
f. Reac on of food with hydrochloric acid
Chemical
g. Absorp on of nutrients by villi in the small intes ne
Both
h. Compac ng of waste materials in the large intes ne
Physical
9. What is homeostasis?
" Homeostasis is the process used by
the body to maintain a stable
internal environment.
10. How does your body maintain a
stable internal temperature?
" Your body maintains a stable internal
temperature through the process of
Homeostasis.
11. Why do you get a fever when you
get sick?
" Most pathogens (germs & viruses)
cannot survive if their environment
(your body) gets too hot.
12. What system do your senses
(hearing, seeing, tas ng, touching,
smelling) belong to?
" Your 5 senses belong to the nervous system
13. What is the name of the nerve
that carries impulses from your eye to
your brain?
" the name of the nerve that carries impulses
from your eye to your brain is the op c nerve
14. Draw an eye and label the&
" Cornea
" Lens
" Re na
" Sclera
" Op c Nerve
15. What does the re na do?
" The re na receives the image seen
through your eye, only in reverse up
to down. It transmits this image
through the op cal nerve and your
brain returns the inverted image to
its correct right side up.
16. What does the pupil do?
" The pupil is the opening in the
middle of the iris that light passes
through. It expands and contracts to
control the amount.
" Brighter light  it contracts.
" Less light  it expands.
17. List the en re pathway that food
takes during diges on. Begin with the
mouth.
" mouth
" esophagus
" stomach
" small intes ne
" large intes ne
" rectum
" anus