Help me please! Going mad!!

[Jan-Jan]

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.

[MrMistery]

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

[Jan-Jan]

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.

[Dr.Stein]

All the best, try not to get cancer of the rectum.

Wee

[mith]

http://www.biology-online.org/9/10_muscle.htm

Hope this link isn't bollocks

[chen.lie]

how rude!!!! it's true that you could have done an effort

[Poison]

Rude? How?