- Pl Ex 02 Pl Ex 02 03 Answer All Parts Answer The Questions A E Given Below Using The Following Figure 4 I 11 Iv 1 (72.62 KiB) Viewed 11 times
PL/EX/02 PL/EX/02 03. Answer all parts. Answer the questions (a-e) given below using the following Figure 4. i. 11. iv. Figure 4. Human digestive system a. Name the structures labelled as A, B, C & D respectively. (2 marks) b. From the above structures, identify an associated gland in the digestive system. (1 mark) (1 mark) c. How does mechanical digestion occur in the organ labelled as "C"? d. Identify the organ where major nutrient absorption occurs? e. Name two enzymes secreted by the organ labelled as "E"? b. Name 02 components of the gastric juice. c. Name two hormones secreted by the Pancreas. a. Explain stepwise enzyme-based digestion of carbohydrates into monosaccharides. (4 marks) (2 marks) (1 mark) REV:00/00.00.0000 iii. Ticks are a group of parasitic Arthropods that live on the skin of various animal hosts. They survive by feeding on their hosts, and the host gets harmed as ticks can spread various diseases. Identify what type of a symbiotic relationship can be observed between ticks and their animal hosts? (1 mark) (1 mark) vi. a. Which heart chamber receives oxygenated blood from the lungs? b. Which heart valve is located between the left ventricle and the aorta? a. What is the main difference between single circulation and double circulation? (2 marks) c. Which blood vessels bring oxygenated blood into the heart? d. Draw the structure of a red blood cell to show its unique features. (1 mark) b. Name the layer that lines the chambers and valves of the human heart? (1 mark) e. Name two substances transported by blood in the body? REV:00/00.00.0000 v. The following 02 statements are based on 02 main stages of the cardiac cycle of a healthy heart. Identify the main stage mentioned in each statement a. This stage lasts for 0.4 seconds and both atrial and ventricular walls are relaxed (1 mark) b. During this stage, semilunar valves are opened, atrioventricular valves are closed, and ventricles are contracted. (1 mark) (1 mark) (1 mark) (1 mark) (1 mark) (2 marks) (Total 25 Marks)