Given below are two statements:
Statement I: Fatty acids and glycerols cannot be absorbed into blood.
Statement II: Specialized lymphatic capillaries called lacteals carry chylomicrons into lymphatic vessels and ultimately into the blood.
In the light of the above statements, choose the most appropriate answer from the options given below:
Statement I: Fatty acids and glycerols cannot be absorbed into blood.
Statement II: Specialized lymphatic capillaries called lacteals carry chylomicrons into lymphatic vessels and ultimately into the blood.
In the light of the above statements, choose the most appropriate answer from the options given below:
- Both statement I and Statement II are correct
- Both statement I and Statement II are incorrect
- Statement I is correct but statement II is incorrect
- Statement I is incorrect but statement II is correct
The Correct Option is A
Solution and Explanation
To determine the correctness of the given statements, we need to understand the physiological processes involved in the absorption of digested fats.
Statement I: Fatty acids and glycerols cannot be absorbed into blood.
Fatty acids and glycerols, the breakdown products of dietary fats, are indeed not directly absorbed into the bloodstream. Instead, they are absorbed into the intestinal cells, where they are re-esterified to form triglycerides. These triglycerides are then packaged into chylomicrons for transport.
Statement II: Specialized lymphatic capillaries called lacteals carry chylomicrons into lymphatic vessels and ultimately into the blood.
This statement is correct. Chylomicrons are lipoprotein particles that are too large to enter blood capillaries directly. Therefore, they enter the lymphatic system through lacteals, which are specialized lymphatic capillaries found in the villi of the small intestine. Ultimately, chylomicrons are transported through the lymphatic system into the thoracic duct, and from there, they enter the bloodstream.
Based on this understanding, the correct conclusion is that both statement I and Statement II are correct.
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Digestion and Absorption - Alimentary Canal
Digestion can be defined as the process of breakdown of large, insoluble and complex food molecules into smaller ones for its absorption and circulation in the body. This process involves the usage of a variety of digestive fluids and enzymes, including saliva, mucus, bile and hydrochloric acid, among others.
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The alimentary canal is mainly referred to as the pathway by which food enters our body and moves out through the anus after digestion. It is a tube-like structure that starts from the mouth and ends in the anus. The alimentary canal plays a primary role in human digestion and is also termed as the digestive tract.
Peristalsis is a series of wave-like muscle contractions that move food through the digestive tract.