Skip to main content

Class 11 Biology- Role of Liver in the Digestion

Class 11 Biology- Role of Liver in the Digestion 

Role of Liver in the Digestion
The main functions of the liver as an accessory digestive organ within the human digestive system are:
The secretion of bile and bile salts: In addition to pancreatic and intestinal secretions, a third secretion that is poured into the duodenum is the bile. Bile or gall is a dark green to yellowish brown fluid and alkaline in nature, produced by the liver and aids the digestion of lipids in the small intestine. In humans, bile is produced continuously by the liver (liver bile) and stored and concentrated in the gallbladder (gallbladder bile). The composition of gallbladder bile is 97% water, and rest is made up of bile salts(the sodium salts secreted in bile, sodium taurocholate and sodium glycocholate, which greatly lower surface tension and are important in emulsifying fats), bile pigments (the complex, highly coloured  waste products of the hemoglobin of old red blood cells, found in the bile, bilirubin , biliverdin, their derivatives; urobilinogen, urobilin, bilicyanin, and bilifuscin), and stercobilin). Other constituents are cholesterol, fatty acids and lecithin, and inorganic salts.
Bile acts to some extent as a surfactant(any substance that tends to reduce the surface tension of a liquid in which it is dissolved) and helps to emulsify the lipids in food. Bile salt anions are hydrophilic on one side and hydrophobic on the other side; hence they tend to aggregate around droplets of lipids (triglycerides and phospholipids) to form micelles, with the hydrophobic sides towards the fat and hydrophilic sides facing outwards. The hydrophilic sides are negatively charged, and this charge prevents fat droplets coated with bile from re-aggregating into larger fat particles.
Visit our website www.takshilalearning.com  for CBSE / NCERT solutions of  Class 11 Maths, Science ; online study material;  practice and sample papers; and CBSE guide.
Labels:

Comments

Post a Comment

Thank you we will contact ASAP.

Popular posts from this blog

Allotment of DIN (Director Identification Number)

Allotment of DIN (Director Identification Number) CS professional course :  Section 153 of the Companies Act, 2013 read with Rule 9 of the Companies (Appointment and Qualification of Directors) Rules, 2014 Every individual intending to be appointed as a director as a director of a company shall make an application for allotment of Director Identification Number (DIN) to the Central Government in such form and manner and along with such fees as may be prescribed. Rule 9 of Companies (Appointment and Qualification of Directors) Rules, 2014 (1) Every Individual, who is to be appointed as a director of a company shall make an application electronically in Form DIR 3, to the Central Government for the allotment of a DIN along with such fees as provided in the Companies (Registration Offices and Fees) Rules, 2014. (2) The Central Government shall provide an electronic system to facilitate submission of an application for the allotment of DIN through the portal on the MCA21...
Post a Comment
Read more

PURCHASED GOODWILL METHOD UNDER IND AS 103

The acquisition of subsidiaries results in  Goodwill calculation  and also records net assets of the subsidiary at fair value on the date of acquisition. Let’s get answers to all the questions related to Goodwill, valuation of NCI, and impairment relating to them. Q1 – What are the ways in which an entity can make payment for purchase consideration? ANS: – Cash – Share exchange – Deferred payment – Contingent consideration Q2 – How is deferred payment dealt, when it forms part of purchase consideration? ANS:  The deferred payment is discounted to present value and included in the cost of consideration. At the end of each year, the liability is increased by unwinding the discount, until the payment is settled. For example, An amount of Rs. 108,000 was deferred to be paid after 2 years. The discount rate applicable is 8%. The net present value today of Rs. 108,000 is equal to (108,000 * 1) / (1.08) ^2)= Rs. 92,593 included in purchase consideration. A liability of Rs. 92,59...
Post a Comment
Read more

Contract of Guarantee important topic for CS Professionals

Contract of Guarantee important topic for CS Professionals For  CS Course  , Takshila Learning is offering CS Professional online classes for students in an easy, convenient, and simple way through our portal  www.takshilalearning.com .  It helps students to grab the conceptual knowledge in a different but simple way. CS online classes for CS preparation are a collection of HD-quality recorded lectures with the detailed explanation of the content by experienced and well-known faculties. An interesting topic from Drafting – ‘ Guarantees ’ is discussed below: Guarantees Contract of Guarantee A “ contract of Guarantee ” is a contract to perform the promise, or discharge the liability, of a third person in case of his default. A Guarantee may be either oral or written. Parties involved in the Contract Surety:  The person who gives the guarantee is called the  “surety”. Principal debtor:  The person in respect of whose default the gua...
Post a Comment
Read more