Summary
OCR Biology A-Level Sliding Filament Model Summary
- Course
- Institution
Handwritten notes detailing all of the necessary Sliding Filament Model content for an A* in OCR A-Level Biology.
[Show more]
Seller
Follow
faithcortis
Content preview
Neuromuscular Junction :. Cast
Action
potential reaches the neuromuscular
junction Opening , the channels
.
2
Cat diffuses into the knob
synaptic
3 .
Acetylcholine leaves via
exocytosis and binds to the Sarcolemma receptors
4 Nat . Channels open causing depolarisation
S .
Depolaisation travels into the fibre by +-tubules
6 .
Caltions diffuse into the sarcoplasm
2 .
Acetylcholine is broken down by acetylcholinesterase
-
choline and ethanoic acid
sliding filament model :
1 An and travels into
.
action potential arrives at the neuromuscular junction the
muscle fiber transverse tubules which contact with the sarcoplasmic
by
are in
reticulum of the muscle fiber
2 .
Sarcoplasmic reticulum releases Cactions into the Sarcoplasm
3 .
Tropomyosin molecule
prevents the
myosin head attaching
to the
binding site ,
↳ cat bind to troponin conformational and pulled
causing tropomyosin
a is
change
away exposing ,
the
binding sites
heads bind to ADP and actin
forming actin-myosin cross bridge
4 the
.
Myosin
S Power Stroke heads and the activ filaments past the
Myosin coch
pull
:
.
in filament and ADP released
shortening the sarcomere is
myos ,
A ATP
myos in head breaking the cross-bridge
. .
new molecule attaches to the ,
7 .
Myosin heads return to the
original positions ,
ATP is
hydrolysed and a
new ADP binds .
heads attach further down and Calt returns
binding
8 to the
.
Myosin to a new site
Sarcoplasmic reticulum .
light band Narrows H-zone Narrows
: :
2 lines :
move closer
together Down band :
stays the same
Needed
Energy for the
powerstroke dissociation of the
myosin head from actin and the
:
,
reabsorption of Calt by active transport
Creatine Phosphate :
Reserve phosphate supply to regenerate ATP
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 faithcortis. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $3.92. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
62491 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now