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Study notes about plasma membrane, membrane proteins and functions, and membrane transport, Study notes of Biology

Pennsylvania State University - Beaver Biology

These notes cover BIO 110 level knowledge of the plasma membrane, membrane proteins, types of membrane transport, and how animal/plant cells regulate their internal environments using these types of transport.

Typology: Study notes

2021/2022

Available from 03/20/2023

melanie-chuu 🇺🇸

2 documents

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outsidesurroundings

yourcells

membrane

transport

and

more yyyyyyyyyyyyy.ggyIlike

lasagna

lining

plasma Membrane

name uphospnoamatsing

boundarythatseparatesthe

living

cellfrom its cytoplasmof

surroundings

mmmm

selectively permeable At Fifdamaged phospholipid

containslipids proteins carbohydrates bilayercanshiftto

aps's's's's's sss's's

drepair that hole

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can m

membraneis fluidstructure at mosaic

of various proteins imac embedded t.mg lemM

mubrangjghousted

In phospholipid bilayer

phospholipids someproteins canmove limits phospholipid movement

within bilayer maintainsfluidityby preventingtight

packing ofphospholipids

i

t.mn

1is ÉÉ

Determine membrane's specific functions

1Peripheral proteins boundto surface of membrane

2Integral proteins penetrate

hydrophobiccore

transmembrane

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nucleus capias

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Partial preview of the text

Download Study notes about plasma membrane, membrane proteins and functions, and membrane transport and more Study notes Biology in PDF only on Docsity!

outside surroundings

your

cells membrane

transportand

more

yyyyyyyyyyyyy.gg

y I

likelasagna

lining

plasma

Membrane

name

uphospnoamatsing

boundarythat

separates

theliving

cell

from

its

cytoplasm of

surroundings

mmmm

selectively

permeable

At

F

if

damaged phospholipid

containslipids

proteins

carbohydrates

bilayer

can shift

to

a

p

s's's's's's

sss's's

d

repair

that

Is hole mostly

phospholipids

amphipathic

can

m

membrane

is fluid

structure

at

mosaic

of various

proteins

imac

embedded

t.mg

le

mM

mubrangjghousted

In phospholipid

bilayer

phospholipids some proteins

can move

limits

phospholipid

movement

within

bilayer

maintains

fluidity

by

preventing tight

packing

of

phospholipids

i

t.mn

is

ÉÉ

Determine

membrane's specific

functions

1

Peripheral proteins

boundto

surface of

membrane

2 Integral

proteins

penetrate

hydrophobic core

transmembrane

t

s

Er

nucleus

capias

metabolized

titties

si

g.gj

j

je

ammens

amcoa

MINA

vets

cu

t

go 20,

cytoplasm attach

G

a

R

ER

t

I

proteins

rest

makyhonpolar

I

mainly

polar

venue plasma

membrane

got

gi

modify

sugar

vesicle

plasma

membrane

i

of

solutes across membrane

Cells recognize

each

other

Enzymatic

activity

by

binding

to

carbohydrates on

the

plasma

membrane

Signal

Reception

Actas receptors for

specific

chemical

membrane

carbohydrates

may

be

messengers relay

their message

to the

bonded

to

lipids

glycolipids

o

inside

of the

cell

to

proteins

glycoproteins

Cell

to

cell

Recognition

some

glycoproteins a glycolipids act

as

cent

External membranecarbohydrate

vary

among

species

individual

ID

g

gap

junctions

and even

among

cell types

1

an

individual

leg

blood

tight

junctions types

Selectively

Permeable

through membrane

impermeable

mm

s

dissolved

gases

permeable

ions

I 83

sugars

integral

proteins

help

with

Membrane

Transport

may

be

Diffusion

tendency for

molecules

Passie choenergyrquied

to

Fdot

everyinto the

available

diffusion

mm

111 ji

facilitateddiffusion

Nocarrierproteins

needed

Going

down

I

gradient

Rate of diffusion

depends

on

HighTow

steepness of E

gradient

diffusion facilitated

J

temperature

diffusion

Active

requires

energy at

Dynamic eavarriumequal

molecules move in eachdirection

Going

AGAINST

CT

gradient

FACILITATED

DIFFUSION

Diffusion

of

larger

molecules

hydrophilic

substances requires

transport proteins facilitated

diffusion

Transport

is

doc

solute

J

gradient

so is passive

Transport

proteins

sun

moving

from

high

to

low

Channel

Proteins

carrier

Proteinschange

shape

what

solutes

the

protein

ACTIVE

TRANSPORT

Active Transport moves

substances

against

their

concentration

gradient

Requires ENERGY

usually

ATP membrane

must bepumpedback

performed

by

specific

proteins

embedded

in

the

of

daily

caloriesutilized

for

pump

membranes which

actively

pump

substances

Each

cycle

uses I

ATD

topump

across membrane

Nat out

of

cell

2kt

intocel

keep

higher

Nat

lower

Active Transport

allows

cells

to

maintain insidecell

gradients

that differfrom their surroundings

Himmat

1141188

1141111

Bad

2kt

ATP

App P

c

Bulk

Flow

Transport

requires

Energy

ACTIVE

Endocytosis

Phagocytosis

ÉÉÉs

engulf

bacteria

pinocytosis

reside

transport

aqua

receptor

mediated endocytosis

receptor

helps

import

macromolecules

Exocytosis secretory

cells release

materialsfrom cen

venue

surrounds particle

moves

to

membrane

a

merges with

membrane

Study notes about plasma membrane, membrane proteins and functions, and membrane transport, Study notes of Biology

Related documents

Partial preview of the text

Download Study notes about plasma membrane, membrane proteins and functions, and membrane transport and more Study notes Biology in PDF only on Docsity!

y I

plasma

Membrane

name

uphospnoamatsing

theliving

cytoplasm of

can shift

that

of various

imac

le

bilayer

limits

bilayer

i

t.mn

surface of

titties

si

g.gj

j

je

MINA

R

ER

I

gi

Enzymatic

Signal

be

to the

of the

to

cell

tags

g

and even

tendency for

Passie choenergyrquied

facilitateddiffusion

I

DIFFUSION

larger

diffusion

J

the

for

membranes which

actively

of

cells

to

maintain insidecell

gradients

2kt