help in autonomic nervous system!!!!!!!! please

What chapter is this from?

Chapter 14 

The autonomic nervous system modifies the heartbeat: the sympathetic center increases rate and depth of the heartbeat, and the parasympathetic center slows the heartbeat.

Cholinergic receptors, such as nicotinic and muscarinic receptors, bind acetylcholine. These receptors can be 1) excitatory: target organ in most cases; and 2) inhibitory: heart and CNS.

The autonomic nervous system (ANS) consists of two divisions, each innervating the effector organs. The sympathetic nervous system (SNS) generally speeds up everything except digestion. The parasympathetic nervous system (PNS) generally slows down everything but digestion.

The autonomic nervous system also regulates insulin secretion. Insulins allows cells to become permeable to glucose, thereby decreasing blood sugar levels.

Divisions of the Autonomic Nervous System

1. The parasympathetic division keeps body energy use as low as possible while directing digestion and elimination activities.
2. The sympathetic division prepares the body to respond to an emergency or threatening situation (or vigorous exercise).

so the subtypes of the muscarinic receptors are excitatory and inhibitory?

Sympathetic ganglia are the ganglia of the sympathetic nervous system. They deliver information to the body about stress and impending danger, and are responsible for the familiar fight-or-flight response. They contain approximately 20,000–30,000 nerve cell bodies and are located close to and on either side of the spinal cord in long chains. Sympathetic ganglia are the tissue from which neuroblastoma tumours arise.


Yes, they perform two different things depending on the location.

how this is related in general to metabolism?

Post Merge: 11 years ago

yeah because i know for sure that ADRENERGIC has two receptors which are ALPHA AND BETA and their subtypes are a1 a2 b1 b2 and b3
so manily i think my question is if muscarinic has subtypes?

Mention that, and mention how it is divided into two parts, namely the parasympathetic division, which keeps body energy use as low as possible while directing digestion and elimination activities.

Yes.

  which u said they are: inhibitory and excitatory? right? depending on location of..??

Post Merge: 11 years ago

so digestion and elimination activities and insulin distribution are mainly related to metabolism in general? right?

No, there are five subtypes of muscarinic receptors, named M1-M5.


Yes, and it also depends on the depth of the answer you want to give. That is a general statement that relates the system to metabolism.

here where is the part were the receptors act?

Post Merge: 11 years ago

can you give me more info about those M1-M5 in for dummies explanation if you dont mind

Post Merge: 11 years ago

and on the metabolism question.. im going to have a multiple choice test so i really need more explanation