List down the raw materials for photosynthesis? (1 Mark)
2. Specify what is the role of bile juice in the process of digestion? (1 Mark)
3. Name the respiratory organ in fish and earthworm. (1 Mark)
4. Name the types of blood vessels used for the transportation of blood. (1 Mark)
5. What is dialysis? (1 Mark)
6. How is respiration in plants and respiration in animals different? (2 Marks)
7. Draw the labeled diagram of the human digestive system. (2 Marks)
8. How are alveoli designed and why? (2 Marks)
9. Define excretion. What are the two organs in human beings that act as accessory excretory organs? (2 Marks)
10. State the role of the following (i) Chloroplasts (ii) Diaphragm (iii) Larynx (3 Marks)
11. Give reasons for the following:
(i) The glottis is guarded by epiglottis.
(ii) It is said to not speak while eating.
(iii) Walls of trachea are supported by cartilage rings. (3 Marks)
12. Leaves of a potted plant were coated with wax to block the stomata.
Will this plant remain alive and healthy for long? State three reasons for your answer. (3 Marks)
13. Describe the process and importance of double circulation in humans. (3 Marks)
14. (i) Name the blood vessel that brings oxygenated blood to the human heart. (5 Marks)
(ii) Which chamber of human heart receives oxygenated blood?
(iii) Explain how oxygenated blood from this chamber is sent to all parts of the body.
Answers
Answer:
1) Water,Nitrogen, Co2,Sunlight,Nutrition in Soil
3)Gills in fish and skin for Earthworm
4)Arteries,veins and capillaries
5) A process to filter the water content for the kidney failed people
6)plants they respire Co2 and release O2 in day and O2 and release Co2 in night whereas most animals Respire only O2 and release Co2
7)Kidney and large intestine
Explanation:
Answer:
1) The raw materials required for photosynthesis are CARBON DIOXIDE and WATER.
2). Bile helps with digestion. It breaks down or emulsify fats into fatty acids, which can be taken into the body by the digestive tract. Bile contains mostly cholesterol, bile acids (also called bile salts), and bilirubin (a breakdown product of red blood cells).
3). Fish- Gills
Earthworm- Skin
4) The three types are the arteries, veins, and capillaries. Arteries are the vessels that carry blood away from your heart to the different parts of your body. The pulmonary arteries take blood to the lungs to pick up oxygen.
5) In medicine, dialysis is the process of removing excess water, solutes, and toxins from the blood in people whose kidneys can no longer perform these functions naturally. This is referred to as renal replacement therapy.
6). Respiration is a chain of chemical reactions that cause the breakdown of glucose (or other respiratory substrate,in absence of glucose) to release energy in the form of ATP. ... Again,animals obtain oxygen by breathing air,while plants release oxygen,as a by-product of photosynthesis.
8). The alveoli are adapted to make gas exchange in lungs happen easily and efficiently. ... they give the lungs a really big surface area. they have moist, thin walls (just one cell thick) they have a lot of tiny blood vessels called capillaries. Alveoli provide a surface for the exchange of gases.
9) Excretion is the process by which metabolic waste is eliminated from an organism. ... Excretion is important to maintain the body temperature. The organs in human beings that act as accessory excretory organs are kidneys and liver.
12). If Leaves of healthy potted plant were coated with Vaseline to block the stomata then that plant will not remain healthy for long and die rapidly also. as stomata is blocked, there will be no intake of carbon dioxide. vaseline layer prevent the plant from receiving sunlight.
13). During a single cycle blood goes twice in the heart which is known as double circulation. It is necessary in human being to separate oxygenated and de-oxygenated blood because this makes their circulatory system is more efficient and helps in maintaining constant body temperature.
14).
I)- The pulmonary artery carries deoxygenated blood from the right ventricle into the lungs for oxygenation. The pulmonary veins carry oxygenated blood from the lungs into the left atrium where it is returned to systemic circulation. The aorta is the largest artery in the body.
2) The right and left atria are the top chambers of the heart and receive blood into the heart. The right atrium receives deoxygenated blood from systemic circulation and the left atrium receives oxygenated blood from pulmonary circulation.
3). The right ventricle pumps the blood to the lungs where it becomes oxygenated. The oxygenated blood is brought back to the heart by the pulmonary veins which enter the left atrium. ... The left ventricle pumps the blood to the aorta which will distribute the oxygenated blood to all parts of the body.