Summary

biology 2 summary notes ( cell membrane & cell signalling)

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Course
General biology 2 (101HTK05)

Institution
Vanier College ( )

- pdf document - summary of topics taught throughout the year - perfect preparation for final exam or midterm - organized with diagrams and different colours - has a couple of examples that describe different events (how cells move) - clear and concise diagrams - handwritten on good notes ...

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Uploaded on September 4, 2023
Number of pages 35
Written in 2022/2023
Type Summary

biology
diagrams
simple
final exam
drawings
key words
explain
science
cells
cell membrane
cell signaling
health science
colourful
midterm
summary

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Cell Signaling
Stages of
Signal transduction

1 .

Reception

.
2 Transduction

3 .
Response

Cell Adhesion

Cell Junctions :

-

Light Junctions

desmosomes

gabjunctions

Tight Junctions Desmosomes Cap Junctions

adhere c re a t e for chemical and electrical
restricting movement
strongly to each other channels

made up of
protein that
pull membranes
tgt cadherins a re
important in des . communication between cells

can
dynamic h ave integral a l l ows ions (amino
:

open or close membrane attachment wa t e r ,
,
s m all molecules

watertight Seal :
between cells proteins that for m
bridges between proteins to pass

re s t r i c t passive movement inside adjacent cells in heart
your

bladder anchor
-

in
at
t wo
adjacent and
nontouching cells t wo c o n n exo n s

bladder than
*

cells are closer intestine animal cell communicate
through gap junctions A

ene
.

, Plasmodesmata

plants are connected
by this

travels membrane AND ce ll Walls

Cell
Signaling

molecular transmitted from outside of the to interior
siquals a re cell cell

· response to st i m u l i

factor Stimulates division
growth cell

Autocrine Paracrine Endrocrine
Signaling Signaling Signaling

signals bind to
receptors on same cell t h at secretes them
signals bind to receptors on
nearby cells re l e a s e of hormones that travel LONG DISTANCE

t u m or cells reproduce uncontrollably , respond to
signals
·
target / no
targel cell
through bloodstream to target organs

that st i m u late cell division
·
target cells

/
target targel cell
·
no

c o o rd i n a te b e h av i o u r of in dividu al cells

no dead
cell
signaling
:

signals :

ke e p cells a l i ve and
functioning

-regulates inter nal environment

st i m u l a te ce ll division and differentiation

, a l l ow cells to respond to in environment
changes the

cell
siqualining : all wo r k
tgt

external and internal environment at cellular level relies on
signal transduc tion

Mechanism

1 .
Reception :

cell detects a signaling molecule from the outside of the cell

↑

chemical
siqual ligand
:

signal is detected when
ligand binds to
receptor

receptor is on s u r fa c e of cell inside of the cell

* cell
respond to
signal
ONLY to a specific receptor proteins that can

bind to those
signals *

Ere
&
eptors

Receptors 1 Receptor ligand
Membrane .

binding

transmembrane protein .
2
Signal transduction

large/polar ligands that don't cross
bilayer 3 .
Cellular response

polar ligands bind to transmembrane receptors to transmit 4 .

Changes in
gene expression

into from ou t to inside cell

stimulates produc tion of 2nd signal

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