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

What do you understand by hypelglycemia, Q. What do you understand by Hypel...

Q. What do you understand by Hypelglycemia? Hypelglycemia (abnormally high blood sugar): Maintenance of blood glucose levels within or close to the normal range has been stress

Nervous system control of blood pressure, Q. Nervous System control of bloo...

Q. Nervous System control of blood pressure? Most nervous controls are achieved via involuntary reflex arcs involving pressoreceptors, the vasomotor centers of the medulla, and

What percentage of the offspring will be tall, Tall (T) plants are dominant...

Tall (T) plants are dominant and short (t) plants are recessive. Two heterozygous tall plants are crossed. What percentage of the offspring will be tall?

What is the thermopenetration concept, What is the thermopenetration concep...

What is the thermopenetration concept? The pasteurization of products packed in glass containers leads to a problem of a specific nature, which is referred to as 'thermopenetra

Difference between essential and natural amino acids, What is the differenc...

What is the difference between essential and natural amino acids? Ans) Significant amino acids are those that the organism is not able to synthesize and that require to be inges

Nutrient availability, Nutrient Availability You have seen that cation ...

Nutrient Availability You have seen that cation exchange plays an important part in nutrient availability to plants. Cation exchange functions in two ways as nutrients are rele

Show classification of englearn dprantls system, Q. Show Classification of ...

Q. Show Classification of englearn dPrantls system? The outline and basis of classification of englearn d Prantl's system are given below: 1) Plant Kingdom has been divided,

Chemicals of life, give two examples of chemical reactions which are cataly...

give two examples of chemical reactions which are catalysed by enzymes in the course of brewing

#titleclasses of fish.., what are the two main classes into which fish are ...

what are the two main classes into which fish are divided

Respirator pigments and breathing, RESPIR A T O R Y PIGMENTS - R...

RESPIR A T O R Y PIGMENTS - Resp. pig. is generally Hb (Fe is attached to globine by chellate bond). In Earthworm Erythroqruorine present. Haemocyanine (Cu) genera

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