1.
What are cells? ________________________________________________________________________________________________________
2.
What does unicellular mean? _______________________________________________________________________________________
3.
What does multicellular mean? _______________________________________________________________________________________
4.
What does cell specialization mean?
5.
What is another name for cell specialization? _____________________________________________________________________
6.
Do all cells look alike (the same)? ____yes _____ no (check one)
7.
Do all cells function alike (the same)? ____yes _____ no (check one)
8.
Define cell differentiation.
9.
How do cells SPECIFICALLY specialize (or differentiate) their functions? What do they do to their DNA?
10.
What are the levels of the organization of life? Starting with smallest  largest. a.
b.
c.
d.
e.
f.
11.
Fill in the table below:
Type of Tissue
1.
Epithelial
Examples
2.
Connective
3.
Muscle
4.
Nervous
12.
What is homeostasis?
13.
What do animals need in order to keep constant internal environment/ stay healthy?

a.
b.
c.
d.
e.
f.
14.
Fill in the table below:
Pathway
(Type of Feedback)
Negative
Definition/Explanation Maintains
Homeostasis
(Y or N)
Examples
Positive
15.
Define the following in a pathway: a.
Receptor: _______________________________________________________________________________________________________ b.
Control center: ________________________________________________________________________________________________ c.
Effector: ________________________________________________________________________________________________________
16.
What pathway does your house thermostat resemble? ________ positive ________ negative (check one)
17.
What is thermoregulation?
18.
What happens when you are too hot?
19.
What happens when you are too cold?

20.
Maintaining an internal temperature is an example of _______ positive or _______ negative feedback
(check one).
21.
What could happen when your body tries to fight an infection?
22.
What could happen when your body temperature drops too low (can lead to hypothermia)?
23.
How does your body control its blood sugar levels? a.
Is this is an example of ________ positive or ________ negative feedback (check one).
24.
How does your body control its blood calcium levels? a.
Is this is an example of ________ positive or ________ negative feedback (check one).
25.
How does your body control its gas levels in blood (O
2
and CO
2
) ? a.
Is this is an example of ________ positive or ________ negative feedback (check one).
26.
What happens during labor (baby being born)? a.
Is this is an example of ________ positive or ________ negative feedback (check one).
27.
What is oxytocin? What does it do?
28.
What happens during lactation (baby suckling on breast)?

a.
Is this is an example of ________ positive or ________ negative feedback (check one).
29.
What is prolactin? What does it do?
30.
What happens during blood clotting? a.
Is this is an example of ________ positive or ________ negative feedback (check one).
31.
Homeostasis in Plants: What do plants need to stay healthy? a.
b.
c.
32.
What mechanisms does a plant use to help maintain homeostasis? a.
b.
c.
d.
33.
What do plants use to control this gas exchange? ________________________and ______________________________
34.
What are stoma (pl: stomatat)? ____________________________________________________________________________________
35.
Why do plants need to OPEN stomata? ____________________________________________________________________________
36.
If the plant needs water for photosynthesis, why is water coming out of the stomata?
37.
Why would the plant close stomata using guard cells? ____________________________________________________________
38.
What is the point of having stomata? a.
b.
c.
39.
What is phototrophism? _____________________________________________________________________________________________
40.
What is the central vacuole? _________________________________________________________________________________________