FOR THE LONG ANSWER QUESTIONS!!!

Hey guys
So sorry bout this, but there is more than just the 3 Long questions to answer tomorrow.

You also have a Data processing component, so you'll be given a few graphs and asked to analyse them.

CRAPPOLA

Im so sorry
I made a mistake on the website, but I dont' know if you guys will get this

Tropomyosin is the one that blocks the binding site
I'll mention that in class today

colouring handout

I gave out a colouring sheet to help explain how the muscle contraction works. It wasn't manditory or anything, just made it fun to learn the material because you could colour it.

Im sorry that you didn't get it. If you still want it for the year end exam, ask me for it in class

the Celebration is in 2 parts, so you get half tomorrow and half tuesday

Diagrams

Show me you know what you're talking about.
I was a bio student...I can smell someone B.S.ing me a mile away ;)

You don't ahve to draw Oxford to a T, but I want to be able to make sense of what Im looking at.

Also, Im not sure who's marking, but I have a feeling I will be :P

Reminder

Please put your info on for the lab

Guys, breathe

I know there is so much to know for tomorrow, but i c an't really give you more than I've already given you.

For the Oogenesis question, don't go crazy over it. Know the cycle and which hormones are used when, know the diagram of the cycle.

As for the Long answer questions, it's logical. There are 5 choices, and there are main ideas that you have to know. What would be important topics to know?

Take a step back and look at it as a whole. I can't tell you more than that, and Im sorry. This is an assessment, and Im still your teacher... :P

Mighty Muscle

Muscle breakdown
Skeletal muscle (top right) consists of bundles of long, thin cells called muscle fibres. A group of five muscle fibres with surrounding blood vessels is shown at centre. Each muscle fibre contains numerous "myofibrils", one of which is shown at lower centre. The myofibril is a bundle of two types of protein "myofilament": myosin (green) and actin (red). When the muscle is stimulated, tiny cross-bridges (lower left) in the myosin filaments hook onto actin filaments and pull them along. As a result, myosin and actin filaments slide over each other, shortening the muscle and making it contract.

Actin and Myosin
The thin filament (top) is composed of actin (yellow), tropomyosin (white strip) and troponin (white oval). The thick filament (pink) is composed of several chains of twisted myosin with globular protruding heads. The interaction between myosin and actin is critical to muscle contraction.

Contraction

Simple animation of sliding theory

Muscle contraction I showed in class

How does it all work?
the colouring handout that I gave you explains this really really well.

The Tropomyosin (which is composed of 2 strands) has Troponin attached to it, and winds around the Actin.

The Tropomyosin covers the sites where myosin is able to bind, so myosin is not able to bind. In this state, the muscle is in the relaxed position.

When you want to contract a muscle, Your brain sends a nerve impulse signal to your muscles. Chanels open and release Calcium ions into the blood at the site of the muscle. Calcium binds to the Troponin, which goes through a confirmational change --> it changes shape, causing the structure to change shape, making the tropomyosin move off of the binding site.

The myosin head is then able to bind to the binding site.
this process requires energy (for the myosin head to slide along the actin) so ATP is used.

does that make sense?
take a look at the animation, as well as oxford...it has good detail.

If you have any questions, please come and see me before class...I should be in the office around 8am...if you want me in earlier, just let me know. I also have first period off. (well, not off..it's my prep period)

Hope that helps, and Im sorry for not posting this sooner.

Barrage of comments

LoL
Guys are crazy with the questions... I can't give you anymore hints...I wasn't really supposed to give you any

Short answer includes definitions, drawing and labeling diagrams, and things of that nature.
Drawing a muscle...what I mean is being able to label all the parts of the sarcomere (ie/ I and A bands, how actin and myosin slide over each other.

As for the muscle explaination
I AM SOOO SORRY!
I completely forgot about posting that part!

I'll do it now

What is matter? Nevermind...

The eye
You heard correctly. There isn't anything that I could see on the eye, which is unfortunate because it is facinating. You will learn it again in the future, so don't forget it all.

Difference between the matters in the brain....
Umm... did you learn this in class when you went over the nervous system with Mr.Laudari?
This is what I found on the different types of brain matters, but I wasn't there for the unit you guys did on nerves, so I can't say if you're supposed to know this or not....

The parts of the central nervous system that contain grey matter (composed of neuron cell bodies) are often called nuclei or ganglia. Certain groups of axons found in the brain’s white matter are called pathways or bundles.

Generally, grey matter can be understood as the parts of the brain responsible for information processing; whereas, white matter is responsible for information transmission. In addition, grey matter does not have a myelin sheath and does not regenerate after injury unlike white matter.



I'm about to leave for Sunday Dinner with the Grandma and family, so I gotta run, but I'll check the IB textbook when I get back and post that later this evening.

Romeo, Romeo, wherefore art thou Romeo?

Hmm, Ok, so I read over the list of topics below, and it didn't explicitly say "Thermoregulation and the Pancreas", so that's my bad

Buuuuut we spent a whole whack of time on is, so I'd say you should know it....well.
It's in the pages listed of what you have to know...

Thermoreg and the Pancreas are on the same page, under Romoestasis
Page 53 in Oxford.

* * * Please check the index! It's a Faaabulicious Tool...Thanks :D * * *

o_O