Energy Process Part 3 Notes Flashcards
What cell membrane structure allows
membrane to carry out its function
What is cell membrane made of
Special fats called phospholipids
2 parts of phospholipid
hydrophilic polar head, hydrophobic non polar tail
What polar head likes to interact with and where it faces
Likes Water and charged molecules
faces outward to interact with water and charged molecules
What non polar tail doesn’t like and where they face
Water and charged molecules
Face inwards
What has a hard time passing through cell membrane
Larger molecules: ex large carbs, proteins
Charged molecules because of hydrophobic core: ex na, k, cl, h2o
What has easy time passing through cell membrane
Small and uncharged molecules: ex co2, o2
Methods of moving across cell membrane: passive transport, no atp
Diffusion: ex co2, o2
Facilitated diffusion
Methods of moving across cell membrane: Active transport, yes atp
Transport pumps
Endocytosis
Excoytosis
What else does cell membrane do
Identify and bind to molecules
Provide strength and flexibility
Act as adhesion
How Facilitated diffusion works
Diffusion with help from transport proteins: ex glucose, amino acids
How transport pumps work
Move ions against concentration gradient: ex k, na, cl
How endocytosis works
Enter cell. Pinches membrane inwards, material wrap and make vesicle
How exocytosis works
Exit cell. Fuses with membrane and spits stuff out cell: ex large carb, proteins
