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Different types of transporters carry different types of amino acid like some amino acids are transported by Na dependent secondary transport process and enters absorptive cells in the villi. Dipeptides and tripeptides are transported via secondary active transport with hydrogen ion. After this the amino acid move out of the absorptive cells and enter the blood capillary of the villus by diffusion. Amino acid is then transported in the blood to the liver through the hepatic portal system.
Lipids
Before the large lipid molecule containing triglycerides are digested, the undergo emulsification- a process by which large lipid molecules splits into several small lipid molecules. Bile contains bile salts which are amphipathic in nature that is it has a hydrophobic nature as well as hydrophilic nature. The hydrophobic region binds with large lipid molecule while the hydrophilic region binds with the chyme. This results in breakdown of large lipid molecules in smaller one which makes digestion more effective.
1. Where do digestion of proteins takes place?
A. mouth B. stomach
C. small intestine D. stomach and small intestine
2. What is the function of aminopeptidase?
A. splits amino acids at amino end of peptide
B. splits in 2 amino acids
C. splits amino acid at the carboxyl end of peptide
D. break peptide bond between amino acid and its neighbor
3. Where do the digestion of lipids takes place?
A. small intestine B. stomach
C. small intestine mouth and stomach D. small intestine and stomach
4. which of the following enzymes participate in digestion of proteins?
A. trypsin B. chymotrypsin
C. elastase D. all of the above
5. Which of the following statement is true?
A. trypsin breaks peptide bond at carboxyl end
B. lipases include only pancreatic and lingual lipase
C. Bile salts are necessary of absorption of lipids
D. elastase enzyme is used for digestion of lipid
6. what helps the large molecules of lipids to increase their solubility in watery chyme?
A. bile salts B. fatty acids
C. micelles D. hydrophilic region
7. through which vein, the long chain fatty acids enters into the blood?
A. subclavian vein B. jugular vein
C. external carotid vein D. internal carotid vein
8. Match the following-
A. carboxypeptidase 1. breaks the peptide bond between amino acid and its neighbor
B. elastase 2. Break peptide bond at carboxyl end
C. dipeptidase 3. Breaks dipeptide in each amino acid
D. lipases 4. Used for digestion of lipid
9. what is emulsification?
A. small molecules of lipid combine to form large molecule
B. large molecule split into smaller molecules
C. it is a process which enhances solubility of lipid
D. none of the above
10. which method is used for the transport of amino acids?
A. simple diffusion B. facilitated diffusion
C. passive transport D. none of the above
ANSWERS:-
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REFERENCE:- Gerard J. Tortora -Principles of anatomy and physiology; edition twelfth ; page no.-: 954-958.
The post Digestion and Absorption of Lipids and Proteins and MCQs for NEET, GPAT, SSC, Pharmacist exam appeared first on Gpatindia: Pharmacy Jobs, Admissions, Scholarships, Conference,Grants, Exam Alerts.
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