chapter 3 lab

Plasma membrane structure

Structure: thin, flexible layer made of phospholipids and proteins

Plasma membrane function

Function: protects cell; controls what enters and exits, helps cell communication, maintains homeostasis

Nucleus structure

Structure: membrane bound organelle that’s contained DNA

Nucleus Function

Function: stores DNA, controls cell activity, provides instructions for making protein, helps with growth and reproduction

Nucleolus structure

Structure: small region inside nucleus

Nucleolus Function

Function: makes ribosomes, which help make proteins

Chromosomes (DNA) structure

Structure: tight coiled strands of DNA

Chromosomes (DNA) function

Function: stores genetic info, carry instructions

Ribosomes structure

Structure: tiny structures made of rRNA and proteins

Ribosomes Function

Function: make proteins by reading mRNA

Rough endoplasm reticulum structure

Structure: a network of membrane- covered tubes and sacs with ribosomes attached to surface

Rough endoplasm reticulum function

Function: it makes, fold, and transport proteins

Smooth endoplasm reticulum structure

Structure: network of smooth membrane- covered tubes and sacs with no ribosomes attached

Smooth endoplasm reticulum function

Functions: makes lipids, detox, calcium storage

Lysomomes structure

Structures: small membrane- covered sacs filled with digestive enzymes

Lysomomes Function

Functions: break down waste, old cell parts, and harmful materials

Cell cleanup crew

Peroxisomes structure

Structure: small membrane- covered in sacs containing enzymes

Peroxisomes Function

Functions: break down fatty acids and removed harmful substances from the cell

cell detox team

Mitochondrion structure

Structure: two membranes and inner membrane

Mitochondrion Function

Function: produces ATP

cell powerhouse

centrosomes (centrioles) structure

Structure: small area containing 2 centrioles made of micro-tubes

centrosomes (centrioles) Functions

Function: helps cell divided and legalize micro tubes

= helps organize cell division

Cytoskeleton structure

Structure: network of protein fibers throughout cell

Cytoskeleton Function

Function: gives cell shape, support, helps it move

= cell support system

Microvolli structure

Structure: finger- like extensions on cell surface

Microvolli Function

Function: increase surface area to help cell absorb nutrients

= more surface area for absorption