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60 Cards in this Set

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  • Back
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What’s reception?

The binding of chemical signal to receptior

Binding

What’s transduction ?

The conversion of chemical signal to intracellular changes

Trigger

How many types of cellular communication are there?

Direct contact , synaptic signaling, paracrine signaling and endocrine signaling

Contacts and signaling

Briefly explain direct contact of cells

Signal on the cell surface recognised by adjacent cell

Briefly explain synaptic signalling

Nerve cells release neurotransmitter which binds to receptors in nearby cell

Neurons

Briefly explain paracrine signalling

The signal released can affect neighbouring cells

Briefly explain endocrine signalling

Hormones released affect other cells throughout the body

How many types of cell junctions are there ?

4: Desmosome, gap junction, tight junction, adherens junction

Explain desmosome

Present in skin and urinary bladder, have protein fibers extend from cell surface across the cell to hold adjacent cell

Protein fibers

Explain Tight junction

Impermeable junction , protein molecules on cells fused with adjacent cell, block the flow of in and out of cell

Gap junction

Have channel between the cells to allow the passage of molecules and ions


-heart and smooth muscle

Channel

Explain adherens junction

Cadherin projected from Catenin( attached to actin filament) to attach with adjacent cell


-cardiac muscle and smooth muscle

Roles of membrane receptors

Contact signalling(cells recognize one another) , chemical signalling (different cells response to same ligand)

Explain what is 2nd msg

Short lived intracellular signalling molecule


Non protein substance

What is cyclic AMP

-Made from ATP by Adenylyl Cyclase


-termination of signalling happens when the cAMP is converted to AMP by phosphodiesterase

What is cyclic GMP

-made from GTP by Guanylyl Cyclase


-activates cGMP-dependent protein kinase (protein kinase G)

What is DAG(diacylglycerol)and IP3(inositol triphosphate)

The result of hydrolyse PIP2 by Phospholipase C


-IP3 will trigger Ca2+ releasing


-DAG will activate protein kinase C

How Ca2+ enter cell

Receptor activation: receptor binds with ligand, open Ca2+ channel. And the release of Ca2+ trigger by IP3


Voltage gated Ca2+ channel open

Which type of ligand use intracellular receptor and and which type of ligand use extra cellular receptor

Extracellular receptor: non lipid soluble ligand (hydrophilic)


Intracellular receptor: lipid soluble ligand (Hydrophobic)

What response does intracellular receptors cause?

Direct gene activation

Does epithelial tissue contain blood vessels? How about nerve?

Got nerve but no vessels

Does epithelial tissue contain blood vessels? How about nerve?

Got nerve but no vessels

What is transition epithelium

A Type of epithelium that can stretch

Pseudostratified columnar epithelium, explain the arrangement what’s

Looks like multilayer but actually one , as all the cells can touch the basal membrane

What’s on the lateral(side) surface of epithelium?

Adhesion protein and cell junctions

Basal surface of epithelium contains

Basal lamina


non cellular sheet of protein + reticular fibers to form basement membrane

what’s on the apical surface of an epithelial cells

Microvilli , cilia and flagellum

What is the polarity of a epithelial cells?

Have two ends: apical and basal

List the 3 shapes of epithelial tissue

Squamous , cuboidal and columnar

List the 3 types of thickness of epithelial cells

Simple, stratified and pseudostratified

Function of simple squamous cells and the location

Filtration and diffusion, alveoli and blood vessels

Functions of simple cuboidal cell and the location

Absorption and secretion, ovary and kidney tubules

Function of simple columnar cell and the location

Absorption, secretion and protection, uterus, stomach and intestine

Functions of stratified squamous epithelium cells and the two types of it

Protection. Non kerotinized (oesophagus) and kerotinized (skin)

Stratified cuboidal epithelium , functions

Protection

Stratified columnar epithelium. Functions

Protection

What’s glandular epithelium

Epithelium that specialised for production and secretion of substances

What’s glandular epithelium

Epithelium that specialised for production and secretion of substances

What are the two types of gland that based on different number of secreting cell

Unicellular and multicellular

What are the natures of secretion

Serous- watery


Mucous- slimly


Mixed- mix of watery and slimly

What are the mechanisms of secretion?

Merocrine - cell remain intact


Apocrine - the top portion of cell is pinched off with the mucus


Holocrine - whole cell detached along with mucus

What are the shapes of secreting units

Tubular , acinar and tubular alveolar

What are the arrangement of a duct system

Simple gland , branched gland and compound gland

What derm does connective tissue arise from

Mesoderm

Starts with M

Mesenchyme cells differentiate to form which 4 types of stem cells

Fibroblast (to fibrocyte), chondroblast (to Chondrocyte), osteoblast (to osteocyte), and hematopoietic stem cells

What cells contribute to connective tissue proper, cartilages and bone

Connective tissue proper = fibrocyte


Cartilages = chondrocytes


Bone = osteocyte

Function of connective tissue ?

Protection, support, cushion of organs, insulation of heat and food stores, immune function

Composition of ground substance

Interstitial fluid, adhesion protein, proteoglycan

3 types of connective tissue fibers

Elastic (long and thin), collagen (thin and tough), reticular (branched)

What derm does connective tissue arise from

Mesoderm

Starts with M

2 types of bone

Compact bone and spongy bone

Mesenchyme cells differentiate to form which 4 types of stem cells

Fibroblast (to fibrocyte), chondroblast (to Chondrocyte), osteoblast (to osteocyte), and hematopoietic stem cells

What cells contribute to connective tissue proper, cartilages and bone

Connective tissue proper = fibrocyte


Cartilages = chondrocytes


Bone = osteocyte

Function of connective tissue ?

Protection, support, cushion of organs, insulation of heat and food stores, immune function

Composition of ground substance

Interstitial fluid, adhesion protein, proteoglycan

3 types of connective tissue fibers

Elastic (long and thin), collagen (thin and tough), reticular (branched)

What fibers are present in connective tissue proper :loose, areolar and adipose?

All 3 types of fibers

What are the fibers that present in connective tissue proper: loose, reticular what

Reticular connective proteins

What are the fibers and cell that present in connective tissue proper: dense regular and irregular 3 t

Collagen (arranged neatly in dense regular but arranged randomly in dense irregular), major cells is fibroblast

3 types of cartilage and the order of them in flexibility

Elastic —> hyaline —> fibro