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What effect does acetylcholine exert on cardiac muscle cells?

Study the diagram below and choose the correct description for the part labelled 4 Picture1.png

Ligand gated channels:

Which of the following statements about the enteric nervous system is most accurate?

Damage to what nerve(s) would impair external (lateral) rotation at the shoulder? (all that apply)

A 36 year old male golf player presents for evaluation of right elbow pain. He says the pain began approximately 3 weeks ago after the start of golf season. Physical examination of the elbow reveals  full range of motion but hyperflexion of the  wrist immediately elicits pain that is localized at the medial aspect of the elbow. Which of the following is the most likely mechanism of injury? 

 While riding a bike, a patient fell against a tree and fractured the shaft of the humerus at midlength. The neurological assessment reveals the injury of the nerve that travels close to the shaft of the humerus. Patient experiences loss of extension at the elbow and wrist but able to complete supination due to unaffected:

All of the following statements are correct, except one (choose INCORRECT statement)

A patient with a fractured tibia was treated with a plaster cast. Few days later he developed weakness in dorsiflexion. The compressed nerve was most likely the

Mr. Jones is unable to bring the tip of the thumb to the tip of the other fingers. Physical examination reveals the following appearance of the hand Apes hand.png Find true statements regarding this condition (all that apply)