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

Adenosine triphosphate (atp), Adenosine triphosphate (ATP) is a general fo...

Adenosine triphosphate (ATP) is a general form in which the energy is stored in living systems; comprises of a nucleotide (with ribose sugar) with three phosphate groups. Energy c

Rapport - building, Rapport-Building Here the Counsellor tries to esta...

Rapport-Building Here the Counsellor tries to establish a rapport and gain the client's trust. Let us see how we make friend? When we meet someone we take time to react, we ob

Formation of an h+ gradient, All of the electron carrier in the electron tr...

All of the electron carrier in the electron transport chain interact according to their redox potentials.  Every time whereas an electron transfers occurs, the accepting carrier ha

Explain barrier techniques - protective clothing, Q. Explain Barrier techni...

Q. Explain Barrier techniques - Protective clothing? Protective outerwear is worn to reduce exposure to debris in spatter. Clinic jackets should have long sleeves, a high neck,

Do you know about lateral lines of fishes, Q. What are the lateral lines of...

Q. What are the lateral lines of fishes? The lateral lines of bony fishes are sense organs that extend along both sides of the animal body they make contact with the environmen

Obelia, why obelia shows an intermediate grade of organisation

why obelia shows an intermediate grade of organisation

Difference between spermatogenesis and oogenesis, DIFFERENC E BETWEEN SPER...

DIFFERENC E BETWEEN SPERMATOGENESIS AND OOGENESIS - S.NO . SPERM A T OGENESIS OOGENESIS 1.   2.   3.

Which cells is the nervous tissue constituted, Q. Of which cells is the ner...

Q. Of which cells is the nervous tissue constituted? How is the generic function of this tissue related to the characteristics of the main cell type that forms it? The nervous

Why is cartilage more flexible than bone, Why is the cartilage more flexibl...

Why is the cartilage more flexible than bone? in general, why does cartilage take longer to repair than bone?

Origin of endoplasmic reticulum, ORIGIN OF E.R. (1 )      Originates...

ORIGIN OF E.R. (1 )      Originates from plasma membrane. (2 )      According to Haguenau, E.R.originates from Nebenkern (Germ center). Nebenkern is a group of conce

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