Help on the nervous system

[ans]

What's the easiest/best ways to describe the differences between:

 

Somatic and autonomic nervous system

-somatic has the motor neurone's cell body inside the CNS, while autonomic has its motor neurone's cell body outside the CNS, in the ganglia (2 neurones carry impulse from CNS to organ)

 

 

Sympathetic and parasympathetic NS.

-Sympathetic is concerned with 'flight or fight'; parasympathetic is 'rest and digest'.

-In sympathetic NS, ganglia are connected to each other? (not sure about that)

-Parasympathetic NS - synapse between preganglionic neurone and autonomic neurone is inside the organ (while sympathetic is in the ganglia close to spinal cord).

-Parasympathetic involves the vagus nerve.

-and what about the neurotransmitters? Both use acetylcholine, but sympathetic uses noradrenaline too?

 

posterior and anterior pituitary glands- posterior: secretes hormones made by hypothalamus, into blood (eg ADH and oxytocin)

- anterior: neurones in hypothalamus produce, and secrete hormones into blood vessels. Hormones then travel via blood to anterior pituitary gland, and affect secretions of other hormone.

 

 

I'm unsure about differences between posterior and anterior. If anyone can correct or add to the above, PLEASE REPLY! Thankyou

[coquina]

What's the easiest/best ways to describe the differences between:

 

posterior and anterior pituitary glands- posterior: secretes hormones made by hypothalamus' date=' into blood (eg ADH and oxytocin)

- anterior: neurones in hypothalamus produce, and secrete hormones into blood vessels. Hormones then travel via blood to anterior pituitary gland, and affect secretions of other hormone.

 

 

I'm unsure about differences between posterior and anterior. If anyone can correct or add to the above, PLEASE REPLY! Thankyou [/quote']

 

 

Here's a picture:

http://images.google.com/imgres?imgurl=http://www.driesen.com/pituitarygland.jpg&imgrefurl=http://www.driesen.com/pituitary_gland.htm&h=480&w=640&sz=42&tbnid=zY9uPHmSEp8J:&tbnh=101&tbnw=135&start=1&prev=/images%3Fq%3Dposterior%2Bpituitary%2Bgland%26hl%3Den%26lr%3D%26sa%3DG

 

Anterior generally means toward the front or toward the head.

 

Posterior generally means toward the rear or toward the tail.

 

A definition:

http://www.answers.com/topic/pituitary-gland

[ans]

Thanks for the resource