WLHS / BIOLOGY / Monson
Name:
Date:
Per.
READING GUIDE: 7.3 & 7.4 – Cell Transport & Homeostasis (pages 208-217)
Passive Transport (p. 208-211)
1) Describe how a cell can be compared to a nation. (HINT: see “Think About It” section at beginning of
chapter)
2) How does the cell membrane keep the cell’s internal conditions relatively constant?
3) Cellular cytoplasm consists of
dissolved in
.
4) Describe and give an “every day” example of the process of DIFFUSION.
5) What is meant by PASSIVE TRANSPORT?
6) Since cell membranes are build around
pass through them most easily are
, the molecules that
&
.
7) Describe the process of FACILITATED DIFFUSION. Give an example of facilitated diffusion evident in red
blood cells.
8) What are AQUAPORINS?
9) What is OSMOSIS?
10) For each of the terms below, explain what is meant (in terms of concentration) and then describe how an
animal cell and a plant cell would respond if placed in a solution that is characteristic of each term.
Type of solution:
ISOTONIC:
HYPERTONIC:
HYPOTONIC:
Describe / explain:
Animal cell would…?
Plant cell would…?
11) What is OSMOTIC PRESSURE?
12) Explain why most cells in large organisms (like us!) are NOT in danger of bursting due to osmotic
pressure.
Active Transport (p. 212-213)
13) What is ACTIVE TRANSPORT?
14) How are small molecules and ions moved across the cell membrane against their
concentration gradient?
15) Distinguish between the two types of endocytosis: PHAGOCYTOSIS and PINOCYTOSIS.
● PHAGOCYTOSIS:
● PINOCYTOSIS:
Homeostasis & Cells (p, 214-217)
16) What is meant by HOMEOSTASIS?
17) Study / Read Figures 7-22 and 7-23 on page 215. Summarize the two examples of specialized cells
shown in this figure. (What are their functions? How do their structures enable them to perform their
specialized functions?)
Specialized Cell Type:
Functions:
Structure(s) enabling functions?
Human Trachea Epithelium
Pine Pollen
18) List the levels of organization (from smallest to largest) present in multicellular organisms.