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Help me please! Going mad!!

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Help me please! Going mad!!

Postby Jan-Jan » Tue Jan 31, 2006 5:55 pm

Im having trouble finding some information and im hoping someone her could possibly help me?

1. Skeletal muscles are stimulated to contract when?
A) Calcium Ions bind to the sarcolemma causing an action potential
B) Acetylcholine diffuse into the sarcoplasm
C) Acetylcholine binds to receptors on the sarcolema causing an action potential
D) Atp is released from the sarcoplasmic reticulum
E) Oxygen binds to myoglobin

2. The role of Acetylcholine in skeletal muscle contractions is to
A) Diffuse into the sarcoplasm to open calcium ion channels in the sarcoplasmic reticulum
B) Bind to troponin to expose myosin binding sites
C) Hydrolyze ATP to release energy
D) Bind to specific receptors on the sarcolema to open Sodium ion channels
E) React with Actin Molecules to cause relaxation of a muscle fibre

3. In endochondral bone formation the original pattern for the bone is made of
A) Osseous tissue
B) Keratin
C) Dense irregular connective tissu
D) Elastic cartilage
E) Hyaline cartilage

Many thanks from this new member. Look forward to hopefully one day making a positive contribution myself.
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Postby MrMistery » Tue Jan 31, 2006 7:01 pm

I know the answer to all of them. What do you think? Make an effort, try to answer, justify your answers and then i will share the correct answer
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter
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Inland Taipan
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Postby Jan-Jan » Wed Feb 01, 2006 11:18 am

Thanks for your help, unfortunately I spent all day yesterday trying to get the answears.
Thought I might get some info from here and not just some patronising bolox.
All the best, try not to get cancer of the rectum.
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Postby Dr.Stein » Wed Feb 01, 2006 11:36 am

Jan-Jan wrote:All the best, try not to get cancer of the rectum.

Wee :lol:
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Postby mith » Wed Feb 01, 2006 9:44 pm

Hope this link isn't bollocks :)
Living one day at a time;
Enjoying one moment at a time;
Accepting hardships as the pathway to peace;
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Postby chen.lie » Sat Feb 04, 2006 7:04 pm

how rude!!!! it's true that you could have done an effort
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Postby Poison » Sat Feb 04, 2006 7:55 pm

Rude? How?
It matters not how strait the gate
How charged with punishment the scroll
I am the Master of my fate
I am the Captain of my soul.
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