5.1-5.4 Vocab

Question 1

what is the importance of a membrane?

Answer 1

to separate the cells from the outside environment, regulate passage of materials, and maintain homeostasis

Question 2

what is a cell?

Answer 2

the smallest unit that can carry out all life activities, building blocks of multicellular organisms

Question 3

why is the phospholipid bilayer amphipathic?

Answer 3

hydrophobic tails and hydrophilic heads

Question 4

what is the fluid mosaic model?

Answer 4

an ordered array of constant motion, phospholipids can move laterally or flip-flip

Question 5

what are components of the lipid bilayer?

Answer 5

flexible, self-sealing, and can fuse with other bilayers

Question 6

what are the important functions of the cell membrane?

Answer 6

boundary, work surface, and energy storage

Question 7

what is an integral protein?

Answer 7

amphipathic proteins firmly bound to the membrane

Question 8

what is a transmembrane protein?

Answer 8

an integral protein that extends completely through the membrane

Question 9

what is a peripheral protein?

Answer 9

proteins bound to the exposed regions of integral proteins