Chapter 3 Module 1

Question 1

What is the order of organization

Answer 1

Atoms, molecules, macromolecules, organelles, cells, tissues, organs, organisms

Question 2

How many types of cells are there in the human body

Answer 2

About 200

Question 3

What size is a cell

Answer 3

10-15 micrometers in diameter mostly

Question 4

Plasma membrane

Answer 4

Made of proteins and lipids and defines cell boundaries. Governs interactions with other cells. Controls passage of materials in and out ofcells

Question 5

Intracellular face vs extracellular face

Answer 5

Intracellular side of the plasma membrane faces the cytoplasm and extracellutar faces away

Question 6

What lipids make up the plasma membrane

Answer 6

Lipids make up 98% of the plasma membrane. 75% of the membrane lipids are phospholipids. They have a hydrophobic and hydrophilic property and dry ft laterally to keep membrane fluid. 20% are cholesterol which hold phospholipids still and stiffen membrane. 51. Are glycolipids which are phospholipids with short carb chains on extracellular face

Question 7

What proteins make up the plasma membrane

Answer 7

Transmembrane proteins: pass through membrane, have hydrophilic and hydrophobic properties
Peripheral proteins: adhere to face of the membrane and usually tether to the cytoskeleton