Acetylcholine is a neurotransmitter that helps transmit electrical nervous impulses from one nerve to another. Commonly found when a nerve terminates in a muscle (the neuromuscular junction) to cause contraction.
acetylecholine
acetylecholine
Anticholinergic drugs inhibit the enzyme Acetylcholinesterase enzyme which breaks down acetylcholine. Therefore with more Acetylecholine neurotransmitters present. The cholinergic receptors such as the muscarinic and nicotinic receptors are more likely to find an Ach chemical to join with so their reaction takes place. An example of this is Neostigmine and Physostigmine which improve the ability to void-treating urinary retention or reducing intraocular pressure-treating glaucoma.
The heart rate increases because of your bodies cells need more oxygen during activity. Nerves in the heart make the pacemakers fire electrical impulses faster because they release epinephrine and neropinephrine and thus the heart rate increases.