Chemically gated ion channels open due to the presence of

1. A Describe all the events of impulse transmission including the graded potential, the action potential and its transmission from one neuron to the next. Give as much detail as possible. 1.B Give two interesting medical implications, applications or facts about  neurotransmitters.    (Answer both questions. But concentrate on the first one which is worth most of the points.)

When an action potential passes down an axon, the channels that open are the

In muscle contraction, calcium acts to:

Catecholamines and indoleamines are

The pectoralis major moves the

Depolarization in neurons is generally brought about by

The pectoralis major moves the

Depolarization in neurons is generally brought about by

Chlorine (average atomic mass = 35.45 amu) has two naturally occurring isotopes with masses 34.97 and 36.97 amu.  What is the relative abundance of chlorine-37?