Every parents and close friends may not be aware that a person is using drugs. As we all know this kind of activity is being done in secret. A sudden change in personality may indicate that she or he is using drugs but such a transformation often occurs without drugs. Most people who used drugs begin doing so in their teens or highschool. They experiment with drugs out of curiousity, for a thrill, or for an expression of rebellion due to family problems and other personal confllicts.
It is easier to prevent drug abuse than to stop the practice after it has started. Thus such assistance of drug testing in schools is needed to lessen the bad effects and extensive risks that this prohibited drugs brings to a person.
Flourometers are instruments that measures the intensity of the fluorescence. The molecules of certain materials can absorb light energy of certain wavelenghts and re-emit that energy as light of a different wavelength. The wavelengths of the light absored and of the light emitted are characteristic for the substance involved. If this substance is in solution, the intensity of the light emitted is usually proportional to the intensity of light absorbed and to the concentration of the substance in solution.
Reference: http://apps.who.int/phint/en/p/docf/ http://en.wikipedia.org/wiki/Fluorescence_spectroscopy Photo: by B Lindy
This vote is a vote of admiration and appreciation for these bloggers who had unselfishly shared their time and expertise with us, most especially to Dr. Lorenzo Bernardino (Doc Z) and Sir Roy. They had showed us how true bloggers should work and cooperate with each other to promote camaraderie and wholesomeness.
Ovaries, a pair of female gonad, oval in shape and about the size of an unshelled walnut. On each side of the uterus, one ovary is located. To the fallopian tubes, the ovaries are close to, but not actually connected. To store and release egg cells, the ovaries function. Also in the secretion of the female sex hormones, estrogens and progesterone.
As one of the eggs stored in the ovaries matures, about midway through the menstrual cycle it will be released, ovulation occurs. If the egg is fertilized, a pregnancy begins. In preparation for pregnancy, the ovaries will release progesterone as well as estrogens. Hormones that will cause the lining of the uterus to thicken. If the egg is not fertilized, the uterine lining is shed, along with the egg, allowing the uterus to prepare anew for a fresh egg.
Between the ages of 45 and 50, most women enter a period called menopause and stop menstruating. The ovaries gradually shrink and stop functioning,
ANSWERS: 1. Germinal epithelium or mesothelium 2. Estrogen 3. Progesterone 4. Corpus luteum 5. Follicular cells 6. Granulosa cells 7. Egg cells or Oocytes 8. Corpus albicans 9. Tunica albuginea 10. Ovaries
QUESTIONS: ______ 1. It is the outermost layer of the ovaries. ______ 2. Hormone secreted by the ovaries which promotes female secondary sexual char. ______ 3. Hormones secreted by the ovaries which prepares the uterus for pregnancy. ______ 4. The _____ is derived from the ovarian follicles. ______ 5. ______ 6. Give 3 type of cells which can found in the ovaries. ______ 7. ______ 8. These are the remnants of the corpus luteum. ______ 9. The _____ is a dense connective tissue that surrounds the ovary. ______ 10. The ____ , also called the female gonads, serve as a site of production and secretion of the female sex hormones.