Template:Aquatic layer topics. An abyssal plain is an underwater plain on the deep ocean floor, usually found at depths between 3000 and 6000 m. Lying generally between the foot of a continental rise and a mid-ocean ridge, abyssal plains cover more than 50% of the Earth âs surface.
Murad discovered in 1977 that nitroglycerin and related artery-widening compounds act by releasing nitric oxide. Furchgott later concluded that cells in the inner lining of blood vessels secrete some unknown substance that makes vessels dilate.
- Shock: if too much nitric oxide is produced, it can dilate blood vessels dropping the blood pressure. - Lungs: inhalation of nitric oxide gas has been effective in treating some intensive care patients including infants with lung disorders. - Nervous system: when nitric oxide is formed in nerve cells, it can stimulate the brain and modulate many functions, from behavior to gastrointestinal activity.