EOC Review_ Cell Transport

Things that Cells Do 1:
Cell Transport

​Your Objectives

B.4B investigate and explain cellular processes, including homeostasis, and transport of molecules

​What you need to be able to do

1. Predict movement of molecules across a cell membrane.

2. Predict how body will react to stimuli such as exercise, temperature, changes, etc.

​Modeling the Cell Membrane

Fluid mosaic model: cell membranes article (article) | Khan Academy

1. On your own cell membrane model, indicate a phospholipid (color YELLOW)
2. Indicate a cholesterol molecule (look carefully, and color one red)
3. Label the membrane proteins by coloring them blue.

4. Discuss: What do you think those antenna-like molecules do?

​Cell Transport

1. By default, molecules tend to move from high concentration TO low concentration, per molecule.

   (When molecules move in this way, it's passive transport.)

(W

​Cell Transport

1. Cells can also defy the concentration gradient by exerting energy.

   (When molecules move in this way, it's active energy.)

​Effects of Osmosis on Cells

For your notes:

Hypertonic:
Hypotonic:
Isotonic:


CFU: Does water move towards the hypertonic or towards the hypotonic area?

​Cell Transport: Models

​Realize Reader (savvasrealize.com)


Create a model for:

(simple) Diffusion
Facilitated Diffusion
Protein Pump
Exocytosis/Endocytosis

​CFU: Cell Transport

Cell Membranes and Transport: Before the Bell Biology (youtube.com)

​Homeostasis: Continued

​1. Discuss:
A jogger decides to up their pace during a marathon.
How does the body respond to maintain homeostasis? (Hint: O2)


2. The jogger gets cold because they're jogging when it is freezing outside.
How does the body respond to maintain homeostasis?