Class notes
Chapter 3: Cells - The Living Units
- Course
- BIO 1301
- Institution
- University Of New Orleans
In this chapter you will be taking a deeping dive on cells in what there role is in the body.
[Show more]
Seller
Follow
Content preview
CEIIIS : TE LIVING UNITSSa
-
. I cells are the smallest unit of life
3
The cell is the smallest unit when you define the of cells you define the properties of life
I
properties ,
.
All organisms are made of one or more cells Cells are the structural and functional building
.
. Different cell types have different functions within an organism and the
blocks of an organism ,
activity of an organism depends on the activities of individual cells and of all of the cells together.
cells only arise from other cells
. Most body cells arise by mitosis ,
which we explore later in the
chapter .
·
- erythrocytes
! Y
m
·
T
epithelial cells
· ·- (
- Am
· ··
=>
·
· =
>
· mip ··
··
e
·
e
·
e
·-
-
g
e
·
# #
↑ ⑭
- ⑭
·
· ·
-
-
&
mm
-
pe
·
-
er A
·
-
ex
·
ree
·
· prem
= ·(
T
·· ·
S
#
·
- · e
fibroblasts
⑭ · #
A
-
linings, or
⑤
cells that connect body parts , form transport gases
-T
-
=a
g
-
-
·
f
S
-
-
F
·
S
Skeletal muscle
S
fat cell
Fr
smooth muscle
· D
h
·C&*
· ·
Cell that store
Cell
F Cells
a
#% >
nutrients
S
-
m
-
-
·
=>
-=
-
--
-
--
W
·-
-
=> -
- -
- >
·
--
·
=
-
-
-
E cells that
move organs and
body parts
m
--
i &-
*
&
S
nm- Up·
··
cell
· 2 nerve
&
-
- -
W
↳ A
)#⑰-
- ·
[
↓ ·
- ·
·
=·
-
-
-
-
- ·Y &
I
that gathers info
=
A
# cell
#Y ↑D
and controls
** body I1
-
⑧
·
-
functions ·
·
macrophage
a
light disease
⑳
sperm
#
S
-
cell of reproduction
, A human cell has three main parts :
The boundary the cell which barrier.
plasma membrane : the outer of ,
acts as a
selectively permeable
The cytoplasm : the intracellular fluid packed with organelles ,
small structures that perform specific ce
functions
The organelle that controls cellular activities the nucleus lies near the cell's
nucleus : an
.
Typically
Center .
Extracellular Materials
Extracellular fluid internal fluid located outside cells includes interstitial fluid ,
,
blood plasma and ,
cerebrospinal fluid .
cellular secretions these secretions include substances that did in digestion and some that act a
lubricants (Saliva ,
mucus and serous
,
fluids)
Extracellular material
matrix most abundant extracellular . Nonliving material in connective tissu
consisting of ground substance and fibers ; separates the living cells .
Part 1 Plasma Membrane
plasma membrane separates two of the body's major fluid compartments the intracellular fluid -
within cells and the extracellular fluid outside . Its a membrane
cells composed of phospholipids
, ,
cholesterol and proteins that encloses , ,
cell contents ,
outer lining cell membrane
.
.2
3 The plasma membrane is a double
layer of phospholipids with embedded proteins
The fluid mosaic model is a
depiction of the structure of the membranes of a cell a
phospholipid
bilayers in which proteins are .
dispersed
Membrane Lipids
The lipid bilayer forms the basic "fabric" of the membrane It is constructed .
largely of
phospholipids ,
with smaller amounts of cholesterol
Phospholids have hydrophilic heads that are attracted to water the main constituent of
·
schematic plasma membrane
Cinclu des phosphate group) I extracellular fluid
acids) polar heads Nonpolar tails "hide"
face the water from the water
inside outside
the cell
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller sydneymarshall. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $8.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
81531 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now