The Circulatory, Respiratory, Digestive, and Excretory Systems Chapter 21, 22 &2
ID: 257868 • Letter: T
Question
The Circulatory, Respiratory, Digestive, and Excretory Systems Chapter 21, 22 &23 7. Chemical digestion begins in the a. small intestine. b. stomach. c. esophagus. d. mouth. 8. Which of the following are micronutrients? a. minerals b. proteins c. lipids d. carbohydrates 9. Obesity occurs when the body mass index is at least a. 10 kg/m b. 15 kg/m2 c. 20 kg/m2 d. 30 kg/m 10. Organs of excretion include a. the liver. b. the lungs. c. the large intestine. d. all of the above True or False Write true if the statement is true or false if the statement is false. 11. The heart consists mainly of muscle. 12. Blood pressure is highest in veins. 13. Atherosclerosis is the buildup of plaque inside arteries. 14. Platelets are blood cells that fight infections. 15. Peripheral gas exchange takes place in the lungs. 16. Food travels from the mouth to the stomach because of gravity. 17. Most absorption of nutrients takes place in the stomach. 18. For good health, you should never eat lipids. 19. The kidneys are the main organs of the excretory system. 20. Nephrons carry urine out of the body.Explanation / Answer
7. Chemical digestion begins in the mouth where the enzyme salivary amylase breaks down starch of the food. Hence, the correct option is d. mouth.
8. Micronutrients are those nutrients which are required by the body in small amounts which includes vitamins and minerals. Hence, the correct option is a. minerals.
9. BMI stands for Body Mass Index. It is obtained by dividing the the weight of the person by the square of the height. If it is over 30kg/m2, then the person is considered obese. Hence, the correct option is d. 30kg/m2
10. Organs of excretion includes the kidney, large intestine, kidney, liver and lungs. Hence, the correct option is d.