1. 7.4 Homeostasis and Cells
Connecting previous material. How is homeostasis related to cell transport?
Cell transport maintains homeostasis
Cells can adapt to their environment
Cell transport can include removing waste
If a cell is hypertonic to the solution, then water will tend to go into the cell – but to maintain its original concentration, it must use cell transport to either take in solutes or to remove water

2. 7.4 Homeostasis and Cells
Working with Words. Why is cell specialization also referred to as cell differentiation?
Specialization – different cells (in a multicellular organism) have different roles
Their structures are also different
That’s what differentiation is

3. 7.4 Homeostasis and Cells
Going further. Give two other examples of levels of organization in the human body. (The text example began with “muscle cells”.)
Blood cell  blood in veins  heart  circulatory/cardiovascular system
Intestine cell  intestinal tissue  large intestine  digestive/excretory system
Subatomic particles  element/Atoms  Molecules  Organelles  Cell  tissue  organ  organ system  organism  population  community  ecosystem  biome  biosphere  earth  solar system  Milky Way

4. 7.4 Homeostasis and Cells
Infer. Cell receptors are composed of ____ (biomolecule).
- proteins
Working with words. How is “receptor” related to “receive”?
Same root – to get something; opposite of give
Noun – receptor; Verb – receive
Other words: recipient, reception, receptionist, receipt