Cholesterol, Biology

Assignment Help:

CHOLESTEROL

  1. Other name is parental steroid.
  2. It is present all over the body but absent in cerebrospinal fluid.
  3. Cholesterol is found exclusively in animal food.
  4. It has also been reported to occur in Potato.
  5. The major part of body cholesterol is synthesized in liver and adrenal cortex.
  6. Other organs taking part in synthesis of cholesterol are skin, intestine, kidneys, ovaries and testes.
  7. Normal cholesterol concentration of blood is 140 - 250 mg/100 ml.
  8. It also forms component of low density lipoproteins (LDL or b -lipoprotein, 10 - 25%) and high density lipoproteins (HDL or a -proteins, 20%).
  9. Concentration of LDL and VLDL is found to increase in atherosclerosis and coronary thrombosis.
  10. Cholesterol is component of cell membranes in animals and wall-less bacteria called mycoplasma.
  11. It helps in formation of bile salts.
  12. Cholesterol prevents premature breakdown of erythrocytes.
  13. Cholesterol transports fat to liver for metabolism.
  14. It produces sex hormones - progesterone, estrogen (female sex hormones) and testosterone (male sex hormone).
  15. Moulting hormone ecdysone is formed from cholesterol in insects.
  16. On combination with a saturated fatty acid, cholesterol forms yellowish plaques in the walls of large and medium sized arteries. The walls become thick fibrotic and calcified. The phenomenon is called atherosclerosis. It narrows lumen of arteries resulting in reduced flow of blood.
  17. Birth control tablets possess steroid hormone progesterone.

Related Discussions:- Cholesterol

Explain the eating disorder not otherwise specified (ednos), Explain the Ea...

Explain the Eating Disorder Not Otherwise Specified (EDNOS)? Earlier, we emphasized that a diagnostic category for eating disorders that fail to meet full criteria for anorexia

Dna double helix , In the year of 1953, Watson and Crick worked out the...

In the year of 1953, Watson and Crick worked out the 3-D structure of DNA, beginning from X-ray diffraction photographs   taken through Wilkins and Franklin. They decreased which D

Why conserve wild life ?, WHY CONSERVE WILD LIFE ? 1 .       ECONOMIC...

WHY CONSERVE WILD LIFE ? 1 .       ECONOMIC IMPORTANCE OF WILD LIFE - (i) Plants - (ii) Animals - (iii) Micro organisms - 2 .       ECOLOGICAL BALANCE -

Explain disease motion sickness, Motion Sickness  The pathogenesis of m...

Motion Sickness  The pathogenesis of motion sickness is poorly under- stood. The prescription cholinergic blocker scopolamine in a patch or oral formulation can decrease sympto

Do moulds need water for growth, Do moulds need water for growth? Place...

Do moulds need water for growth? Place a spoonful of dry cereal like as rice or oatmeal in a sterile culture dish. Place a like amount of the similar cereal cooked in another c

Expression of variability, In the preceding section we emphasised the fact ...

In the preceding section we emphasised the fact that cvolution or the continuous adaptations to the environment can take place only when pheiiotypes exhibit variability. In the abs

Synthesis and storage of hormone, Synthesis and Storage of Hormone The...

Synthesis and Storage of Hormone The synthesis and storage of hormone depends on the nature of the hormone. Steroid hormones are secreted in diffuse molecular form and usually

Pollen stigma interaction - stigma, Pollen Stigma Interaction - Stigma ...

Pollen Stigma Interaction - Stigma The Stigma After landing on the stigma pollen grain germinates, and produces a pollen tube that carries the male gametes. The stigma has bee

Bacillary dysentery and its etiology, Bacillary Dysentery   You have le...

Bacillary Dysentery   You have learnt about the diarrhoea in the foregoing sub-section, now let us take for example a child who has loose motion which contains blood and mucus

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd