Exam (elaborations)
Btec Science, Biology, B3 Questions And Answers With Verified Solutions Already Passed!!!
- Course
- Institution
Btec Science, Biology, B3 Questions And Answers With Verified Solutions Already Passed!!!
[Show more]
Content preview
Btec Science, Biology, B3 QuestionsAnd Answers With Verified Solutions
Already Passed!!!
What are myofibrils? - ANSWER✔✔They are cylindrical organelles that run along
the length of muscle fibres, they are the site of muscle contraction
How are myosin and actin filaments arranged? - ANSWER✔✔In an alternating
pattern in sarcomeres, thick myosin filaments overlap with the thin actin filaments
at each end
What is a pair of muscles called? - ANSWER✔✔An antagonistic pair
What is the sarcolemma? - ANSWER✔✔The membrane of muscle fibres
what is the mitochandria? - ANSWER✔✔The organelle that provides lots of ATP
to power muscle contraction
What is skeletal muscle? - ANSWER✔✔It consists of bundles of muscle fibres.
Muscle fibres contain organelles that are the site of muscle contraction
What are the stages of the sliding filament theory? - ANSWER✔✔Depolarisation
of the sarcolemma
Contraction of sarcomeres
Muscle contraction
Muscle relaxation
, What is depolarisation? - ANSWER✔✔Refers to a sudden change in membrane
potential usually from a relatively negative to positive internal charge
When muscle fibres are at rest what is the protein that blocks the actin-myosin
binding site called? - ANSWER✔✔Tropomysin
Where is epithelial tissue found? - ANSWER✔✔Lining organs and surfaces
What are the different types of of epithelial tissue? - ANSWER✔✔Squamous
Columnar
Endothelium
What is squamous epithelium tissue made out of and what do these form? -
ANSWER✔✔It is made from flattened specialised squamous epithelial cells
form a thin, smooth, flat layer
What does a smooth, thin flat layer created by epithelium tissue allow? -
ANSWER✔✔Rapid difussion
What does smoking do to Epithelium cells? - ANSWER✔✔Smoking damages the
cells
it irritates and causes inflammation, and scarring in the epithelium tissue of the
lungs
What happens to the alveoli in the lungs when you smoke? - ANSWER✔✔The
alveoli walls become thicker due to scarring and produce more mucous, this
damage to the air sacs causes emphysema and the lungs lose their natural elasticity
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 classhub. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $13.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
84146 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now