Welcome to your OCR AS Biology 7 Which of the following is not a component of gastric juice? Enzyme pepsin HCl Secretin ReninWhich of the following is not a function performed by the small intestine? Absorption of mineral ions actively. Food is converted to chyme. Absorption of vitamins. Acts as an endocrine gland.What is the major method of food absorption in small intestines? Passive absorption Facilitated diffusion Active absorption Simple diffusionWhich of the following aids in stretching and recoiling of alveolar walls? Secretary cells Elastic fibres Goblet cells Ciliated cellsBlood in veins is dark red in colour. What does it imply? Oxygenation Blood inclusive of calcium in high doses. Deoxygenation Blood free of antibodiesThe feel of 'pulse' in your wrist is due to ________. A capillary Circulatory malfunction An artery A veinWhat happens when the blood enters an artery at low pressure? Walls of the artery widens. The artery tries to raise the pressure a bit. The blood flows back outwards. Nothing happens.Capillaries form a network throughout every tissue in the body except ________. Cornea and skeletal muscles Colon and skin Skin and cartilage Cornea and cartilageCapillary networks are also called the _________. Capillary tubules Capillary beds Venules Capillary meshWhat is the function of enzyme pepsin? Digests protein partially. Dissolves intercellular substances. Converts pepsinogen into pepsin. Digests emulsified fat in milk.Select the incorrect statement regarding the food digestion in colon. Parasitic micro organisms synthesize vitamin K and folic acid. Faecal matter is formed. Chyme is not chemically digested. Micro organisms are destroyed by lymphatic tissues.A similarity between arteries and veins. The direction of blood flow. Thickness of the wall. Location Composition of the wall.Which of the following principles is not used by the small intestine for absorption? Facilitated diffusion Passive absorption Active absorption Simple diffusionWhat is the function of dipeptidases? They digest sucrose. They digest maltose. They digest lactose. They convert dipeptides into aminoacids.Why are blood samples normally taken from veins rather than arteries? Due to the convenience. Only veins carry the required amount of blood. Due to the low pressure in them. Due to the high pressure in them.Which is not an adaptation of small intestine for food absorption? Presence of villi. Long in length. It is connected to the large intestine. Presence of lacteal ducts.Tissue fluid is the result of _______. Leaked platelets Leaked WBC Leaked antibodies Leaked plasmaWhat is the role of aminopeptidase found in the intestinal juice? Converts starch into disaccharides. Converts small polypeptides into dipeptides and aminoacids. Activates trypsinogen. Converts emulsified fat into fatty acids and glycerol.Select the incorrect statement regarding tissue fluid. It is through tissue fluid that exchanges of materials between cells and the blood occur. Tissue fluid is almost identical in composition to blood plasma. Tissue fluid forms the immediate environment of each individual body cell. Tissue fluid is not maintained at a constant level within our body.Which of the following feature in the veins would help prevent the backflow of blood? Tunica intima Valves Tunica externa Tunica mediaTime is Up!
