Cells a) Below is a drawing of a cell membrane. Name the structures labeled A and B. A. A = phospholipid.
{"Image DocumentName": "Cellsa) Below is a drawing of a cell membrane. Name the structures labeled A and B. A. A = phospholipid.", "Image ImageDescription": "B = protein. B. b) Describe the function of the. i) A \u2013 waterproof, flexible layer, that lets in small particles. ii) B \u2013 provides channels for larger particles (facilitated diffusions), acts as pumps (active transport), acts as receptor sites. c) Cell membranes are differentially or semi-permeable. Define differentially or semi-permeable. Allows some substances through, but not others. d) Explain the difference between passive and active transport. Give examples of each. Passive \u2013 no energy required, eg osmosis, diffusion, substances move along a concentration gradient - from areas of high concentration, to areas of low concentration. Active \u2013 energy required, eg active transport, ion pumps, endocytosis, exocytosis, substances can move against a concentration gradient - from areas of low concentration, to areas of high concentration.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}