Human Anatomy & Physiology 1
Bio 111

Use Chapter 3 in your textbook to do these Pre-Workshop Activities.

Activity A

Match each of the following terms to its proper description.

___active transport	A. Movement of molecules down the concentration gradient
___phospholipid	B.When placed in such a solution the cell swells and bursts
___fluid mosaic model	C. Movement of water molecules towards salt across a semipermeable membrane.
___passive transport	D. When placed in such a solution the cell remains stable
___pinocytosis	E. When placed in such a solution the cell shrivels
___osmosis	F. A secretory vesicle uses this method to expel its contents outside the cell
___phagocytosis	G. It has a hydrophilic head and a hydrophobic tail.
___ facilitated diffusion	H. A process by which the cell engulfs water (liquid)
___ simple diffusion	I. A process by which the cell engulfs solid objects such as a pathogen
___ endocytosis	J. The molecular arrangement of the cell membrane is described in this way.
___ exocytosis	K. This type of transport requires a protein but not ATP
___ hypertonic	L. This type of transport requires both a protein pump and ATP.
___ hypotonic	M. Any type of transport that does not require ATP
___ isotonic	N. Cholesterol is picked up by liver cells using this method.

Activity B: Organization of the Cell Membrane

Follow the instructions below to develop you own diagram of the cell membrane. Add components as described.

1.On your paper, draw from memory, if possible, the following elements and label them.

a) Label the extracellular and intracellular fluids

b) Draw a single phospholipid molecule: label the hydrophilic and hydrophobic ends.

c) Now add additional phospholipids to form a phospholipid bilayer with the molecules in correct orientation. Leave one gap in your patch to insert other elements. Label the outside (top) and the inside (bottom) of the cell.

d) Add two peripheral proteins.

e) Add water molecules in the correct positions.

f) Add a cholesterol moelcule.

g) Draw an integral protein in the gap in your drawing. Show it with a carbohydrate attached forming a glycoprotein. Label the parts.

i) Label the pathway of O2, CO2, and H2O across the membrane as indicated by arrows. You may want to draw another membrane protein for the water.

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