AP9HW: pp. 24-29

• What are the major components of the cell?

• HW: Chapter 2 this week. • tonight: pp. 18-23

Do NOT copy this

• A child appears to develop normally for the first six months of life. The child becomes blind, deaf, and unable to swallow. Muscles begin to atrophy and paralysis sets in. Death usually occurs before the age of 4

terms

• plasma membrane• cytosol• organelles

– endoplasmic reticulum– ribosomes– lysosomes– mitochondria– nucleus

plasma (cell) membrane

• encloses the cell• lipid bilayer

• what does lipid mean?

plasma membrane

• hydrophobic = “water fearing”

• hydrophilic = “water loving”

endoplasmic reticulum

• “synthesizing factory”

• primarily synthesizes proteins

• 2 types: smooth ER and rough ER

ribosomes

• on rough ER• site of protein synthesis

smooth ER

• lipid metabolism– e.g. steroid hormone secretion

• detoxification

• sarcoplasmic reticulum: special ER in muscles.– stores Ca2+– role in muscle contraction

lysosomes

enzymes

• proteins that do work

nucleus