Ch 4 – A Tour of the Cell. The cell is the basic unit of structure and function in the body. Prokaryote v. Eukaryote Are smaller than eukaryotic cells Lack internal structures surrounded by membranes Lack a nucleus There are three principal parts: plasma membrane (plasmalemma)
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
Nucleoid region (DNA)
Not in most
Rough endoplamsicreticulum (ER)
region of protein
(b) Fluid mosaic model of membrane
Production of proteins – located attached to ER or free-floating
Passageway for materials
Produces proteins & processes molecules for secretion
Produces lipids & detoxifies drugs & stores Ca++
Packages material for export & processes macromolecules
Vacuole & vesicle
Contains digestive enzymes. Each contains one specific enzyme.
Carries out photosynthesis:
6CO2 + 6H2O C6H12O6 + 6O2
Aerobic cellular respiration:
C6H12O6 + 6O2 6CO2 + 6H2O +ATP
Cilia, flagella, microvilli
Surface projections – increase surface area & produce movement..
(channels between cells)
(a) Tight junctions
of adjacent cells