MUSCLE CONTRACTION - AQA A LEVEL BIOLOGY + EXAM QUESTIONS RUN THROUGH

[@AlevelBiologyHelp]

00:28 = Muscles acts in antagonistic pairs
01:10 = Structure of myofibrils + sarcomeres
04:06 = Sliding Filament Theory
08:00 = Role of phosphocreatine
08:56 = Slow-twitch and fast-twitch muscle fibres
11:23 = Exam questions and mark schemes

[@MiViLiX]

Thank u soooo much for the playlist, appreciated next levelll.

[@HFR8]

how I came across this account I dont know, but thank you.

[@raahilamidu1441]

Wait so does the myosin head already have an ADP molecule attached to it when it binds to actin or not? I keep seeing different things in different textbooks. Btw your videos are so helpful thank you for making them xx

[@mr.r2207]

Isn’t the sarcoplasm the cytoplasm of muscle cells? Why does it say it’s the cell itself?

[@lucysutton4292]

You are a lifesaver istg

[@arooshamoh5185]

love your videos!!!!

[@fatima.c-h]

Very helpful and clear, thank you.

[@fahmidahahmed3607]

Thanks so much for this 🙏🏽

[@LivingstonKalule-je6no]

Thank u so much it is slow but sure. Plus, what are atps and adp am lost if u talk about that watching in 2023

[@goldenegg7949]

Don't the calcium ions bind to troponin instead of tropomyosin?

[@AlevelBiologyHelp]

Yes, they do indeed, however you don't need to know about troponin for AQA (weird, I know)! :)

[@arjan_c6274]

Is ATPase the same as ATP hydrolase ?

[@AlevelBiologyHelp]

Yes :)

[@DoubleAAce]

For the secnd question can you say ATP hydrolase instead of ATPase

[@AlevelBiologyHelp]

Yeah :)

[@meganjohnson1688]

Hey, at time stamp 17:24 you added in the marksheme. It would be useful if before this you added the question so we could view as you went through.

[@AlevelBiologyHelp]

Thanks for the feedback! :)