Category: N

A groove on the embryo formed by the unfolding of the outer layer of cells and destined to become the nervous system in humans. A groove on the back of an embryo formed as the neural plate closes to form the neural tube. A longitudinal indentation that forms on the dorsal surface of the embryonic…

The patterns of veins in a leaf that form a network.  

Proportion of dietary nitrogen that is retained by the body. A measure of protein quality. It is the percentage ratio of nitrogen retained by rats to their nitrogen intake; the nitrogen retained is the difference in carcass nitrogen (determined experimentally) between rats fed a test diet containing the test protein and those fed a diet…

Frenetic housecleaning by a pregnant woman in the late stage of pregnancy.  

Stress.  

A state of emotional tension, restlessness, and hypersensitivity. An excessive state of nervous system sensitivity marked by disrupted mental composure and stability, muscle tremors or weakness, and an uneasy self-awareness.  

One of two bundles of nerve fibers emerging from the spinal cord at each vertebra to join and form a spinal nerve.    

A method of analgesia in which a nerve-destroying agent is injected close to the affected nerve. Injection of anesthetic into peripheral nerves or nerve trunks to interrupt sensation. A method of making an area of the body numb and pain-free by injecting anesthetic medication around the nerves that control sensation in the area. A nerve…

Any disease of the kidney, particularly the type that involves the tubules. Degeneration of the tissue of a kidney. Disease of the kidney, especially a degenerative, non-inflammatory disease. Degenerative renal condition characterized by damage to the renal tubules without inflammation; also called nephrotic syndrome. Malfunctioning of the kidneys that may occur in conjunction with nephritis…

The medical study of the structure, function, and diseases of the kidneys. The study of the kidney and its diseases. Study of the kidney, its development, anatomy, and physiology, and the diagnosis and treatment of disorders affecting it. The branch of medical study and practice that specializes in the function, diseases, and disorders of the…