Neurons containing the neurotransmitter dopamine are clustered in the midbrain in - substantia nigra .
In the neuron enzymes act on the amino acid tyrosine, which convert it into DOPA, then to dopamine. Some of the dopamine is then converted to norepinephrine, where it is stored in synaptic vesicles.
Vit D effects:
Dietary sources:
Cholesterol is present in the blood and in most of cells, and is a part of substances called lipids. In the blood, cholesterol is bound to certain proteins what makes lipoproteins. Roughly, they are two types of lipoproteins:
Pituitary (hypophysis) hormone TSH (thyroid stimulating hormone) stimulates thyroid to release thyroxine (T4) and triiodothyronine (T3). T4 and T3, when they reach a certain level, lower release of TSH by negative feedback loop. In low T4/T3 (hypothyroidism) TSH will be high, and in high T4/3 (hyperthyroidism) TSH will be low (1). Other factors that lower TSH level:
If you have:
..then you might have:
Written by Jan Modric, February 10th, 2009
The aim of this article is to help to explain results of tests of EBV (Epstein-Barr virus) antibodies levels in the blood .
The main reason for elevated EBV antibodies in the blood is infectious mononucleosis (IM). 95% of us were probably infected with EBV at some point in life, but only some of us had notable symptoms of IM (1).