Alkaloids
The name of physiologically active nitrogen-containing compounds is "amines." These compounds play a crucial role in various physiological processes in the body, including neurotransmission, hormone regulation, and metabolism. Examples of amines include serotonin, adrenaline, and histamine.
David Benton has written: 'Interactions between physiologically active brain metabolites and their behavioural concomitants'
heart wood..... soft wood is any fast-grown wood like pine. Heart wood is the name for any of the inner lays of wood of any tree i.e. its in its heart
Rate pressure product indicates the amount of stress being placed on the heart muscle. The measure is taken by multiplying the heart rate with the systolic blood pressure.
Robin Hood was active in a wood called Sherwood forest.
Physiologically we are programmed to require more oxygen when we are excited so that we can act or react to the excitement. Breathing increases, as does our heart rate to provide oxygen in the blood to our muscles and organs.
Systole
in the winter
Green Heart or Purple Heart
Heart wood, which is the best quality wood in the tree
Your heart beats more when you are active.