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growth cone
growth′ cone`
n. a flattened neuronal area, at the ends of growing axons and dendrites, having radiating structures that guide the pathways of embryonic nerve fibers. growth cone
growth cone[′grōth ‚kōn] (neuroscience) A specialized structure at the end of a growing nerve fiber that guides the fiber to its destination during the development of the nervous system by means of interaction with signaling molecules in its surroundings and its own motile mechanism. growth
growth [grōth] 1. the progressive development of a living thing, especially the process by which the body reaches its point of complete physical development.2. an abnormal formation of tissue, such as a tumor.Human Growth. Human growth from infancy to maturity involves great changes in body size and appearance, including the development of the sexual characteristics. The growth process is not a steady one: at some times growth occurs rapidly, at others slowly. Individual patterns of growth vary widely because of differences in heredity and environment. Children tend to have physiques similar to those of their parents or of earlier forebears; however, environment may modify this tendency. Living conditions, including nutrition and hygiene, have considerable influence on growth.Glands and Growth. The regulators of growth are the endocrine glands, which are themselves subject to hereditary influence. The pituitary gland secretes growth hormone, which controls general body growth, particularly the growth of the skeleton, and also influences metabolism.
In addition to influencing growth directly, the pituitary gland has a central role in regulating the other endocrine glands. These other glands in turn control many body functions, and they secrete the various hormones that directly regulate metabolism.Variations in Growth Rates. The growth of different individuals varies a great deal. It should be remembered that the rate of growth we call “normal” is really only an average rate. There is a wide range of growth rates, almost all of them quite normal. Of the children of a given sex and age, only about two thirds will have physical measurements that fall close to the average.
Growth in height occurs as a result of maturation of the skeleton. When the long bones have reached maturity at about age 18, linear growth stops. In general, the birth weight of the average baby doubles in 5 to 6 months and triples by the end of the first year. At the end of the second year of life birth weight quadruples and then there is a steady increase of 2 to 2.75 kg (4.4 to 6 lb.) each year until the child reaches puberty, at which time there is a period of rapid growth in weight and height.delayed growth and development a nursing diagnosis accepted by the North American Nursing Diagnosis Association, defined as deviation from age group norms.risk for disproportionate growth a nursing diagnosis accepted by the North American Nursing Diagnosis Association, defined as being at risk for growth above the 97th percentile or below the 3rd percentile for age, crossing two percentile channels.growth (grōth), The increase in size of a living being or any of its parts occurring in the process of development.growth (grōth)n.1. a. The process of growing.b. Full development; maturity.2. Development from a lower or simpler to a higher or more complex form; evolution.3. An increase, as in size, number, value, or strength; extension or expansion: population growth.4. An abnormal mass of tissue, such as a tumor, growing in or on a living organism.growth (grōth) The increase in size of a living being or any of its parts occurring in the process of development; as measured in increments of weight, volume, or linear dimensions.
Compare: bioregulatorgrowth the process of increase in size which has three distinct components, - cell division,
- assimilation,
- cell expansion. The basis of growth is CELL DIVISION but in order to increase in size, cells must be able to synthesize new structures that are manufactured from raw materials derived from their immediate environment. This is assimilation and it results in increase in cell size. Growth during development can be continuous but allometric (see ALLOMETRIC GROWTH), as in humans, or can be discontinuous, as in insects where growth occurs at each ECDYSIS.
growth (grōth) Increase in size of a living being or any of its parts occurring in process of development. Patient discussion about growthQ. does the growth hormone have side effects and what are they? A. Yes, it does, and not a few. They include, among others, pain in the joints, carpal tunnel syndrome, diabetes, pain at the injection site, problems with the thyroid gland, ear problems and many others. You may read more about side effects of growth hormone treatment (called Mecasermin or Somatropin) here: http://www.drugs.com/ppa/mecasermin.html Q. Is nutrition vital for healthy hair growth? I am engaged to a girl 3 months back and our marriage is on coming month. I was above heavens when my girl told me that I am handsome. Now I am afraid whether she will hate me soon bcoz, for the past few days I have had drastic hair fall. I feel to be taking less nutrition diet. Is nutrition vital for healthy hair growth? I have dreamt my life with that beautiful angel and never want to lose on that. She can definitely add face value to my happy life. Please guide me to marry my beautiful girl. A. HELLO ZAK...STAY CALM...IF YOUR GIRL REALLY LOVES YOU...SHE WILL NOT BE WORRIED ABOUT A LITTLE HAIR LOSS...OR A LITTLE WEIGHT GAIN.....GOOD LUCK...MRFOOT56 Q. I have a heavy growth of thin hair on my face and neck area. What can I do? I have a heavy growth of thin hair on my face and neck area. I did wax couple of times but found a thick growth of chin hair which was difficult to get rid. I did try to pluck but found that it grows back immediately within a day. I do not like to use electro hair removing. What can I do? A. i saw couple of women that bleach their facial hair...maybe that would work? More discussions about growthFinancialSeegrowth |