1. Multiple choice questions: (Please fill in the answers in the table at the end of the questions, with 2 points for each question and 41 points for * * *)

1. There are many nutrients in food, among which the one that can turn blue with iodine is (? )

A. Starch B. Inorganic salts

C. Moisture D. protein and fat

2. Vegetables and foods are rich in nutrients. ) A. Inorganic salts? B. protein and fat < P > C. Vitamins? D. Sugar < P > 3. protein is composed of amino acids. What kinds of amino acids make up protein? )

A. There are 8 kinds of amino acids? B. There are 21 amino acids < P > C. There are 12 amino acids D. There are 11 amino acids?

4. The method to identify protein in milk is (? )

A. Add iodine solution

B. Add 1.1% potassium permanganate solution

C. Add 11% sodium hydroxide solution and 3% copper sulfate reagent

D. Add 3% sodium hydroxide solution and 11% copper sulfate reagent

5. The following foods need to be processed. )

A. Glucose powder? B. Vitamin pills < P > C. Iodized salt? D. milk powder?

6. Developing children need to supplement a certain amount of protein every day. What food should they eat more? )

A. Hamburgers B. Cabbages and tomatoes

C. Lean meat and fish? D. apples

7. eating rough rice flour is better than eating refined rice flour because it contains more (? )

A. Vitamin A? B. Vitamin B 1 < P > C. Vitamin C? D. vitamin d?

8. pour 11 ml of vegetable oil into a small beaker, add the prepared digestive juice, shake it fully, and put it in warm water at 37℃ for 1 hour, and the vegetable oil disappears. Among the digestive juices prepared, the most reasonable group is (? )

A. Saliva, bile and gastric juice B. Gastric juice, intestinal juice and saliva

C. Bile, intestinal juice and pancreatic juice D. Pancreatic juice, intestinal juice and saliva

9. )

A. Stomach B. Small intestine C. Oral cavity? D. large intestine

11. The doctor took out some contents from the digestive tract of a patient, which were tested to contain vitamins, water, amino acids, a small amount of maltose, inorganic salts, fatty acids and cellulose. Where are these substances most likely to be taken out? ()

A. Oral cavity B. Stomach? C. small intestine? D. Large intestine < P > 11. The human stomach does not digest itself, mainly because () A. There is no enzyme that hydrolyzes protein in the stomach?

B. The inner wall of the stomach is covered with a layer of mucous membrane

C. Pepsin can't digest its protein

D. The stomach wall is thick

12. Among the following statements, the wrong one is

A. Among the three meals a day, the calories and oil in lunch should be the highest.

B. Children need a variety of nutrition, so they can eat whatever they like.

C. Teenagers need more energy and protein than adults at the growth and development stage.

D. The diet should be diversified, the thickness should be matched, the oil should be moderate, and sweets should be eaten less

13. When Iowa was eating, she found that rice felt sweet after chewing in her mouth for a while, because ()

A. Starch was broken down into glucose? B. Fat is preliminarily decomposed

C. protein is preliminarily decomposed D. Starch is decomposed into maltose

14. The following are not physical digestion

A. Tooth chewing? B. Gastrointestinal peristalsis < P > C. Tongue stirring D. Salivary amylase converts starch into maltose < P > 15. Which of the following digestive juices contains enzymes related to protein digestion () < P > A. Gastric juice, pancreatic juice and intestinal juice?

B. saliva, gastric juice and intestinal juice?

C, saliva, pancreatic juice, intestinal juice?

D. Bile, pancreatic juice and intestinal juice

16. The main place for digesting food and absorbing nutrition in the human digestive system ()

A. Oral cavity? B. Stomach C. Small intestine D. Large intestine

17. For leafy vegetables such as leeks, lettuce, water spinach, and chickpea, it is best to wash them with water after buying them. The purpose is (). < P > A. Let the vegetables absorb enough water < P > B. Try to remove the pesticide residues on the surface of the vegetables?

C. Save water

D. Make vegetables crisper?

18. Poisoning may occur when eating the following foods, among which poisoning not caused by germs is

A. Fish bitten by flies B. Rotten oranges

C. Sour steamed bread? D. Uncooked beans

19. The following statement about hemoglobin is correct

A. The content of hemoglobin in red blood cells is the only criterion for distinguishing anemia

B. Hemoglobin is easy to combine with oxygen but not easy to separate

C. Hemoglobin is strong in combining with carbon monoxide but not easy to separate

D. The indispensable substance for forming hemoglobin is zinc

21. ()

a. Input the same type? B. determine the amount of blood input

C. input AB type D. input O type blood

II. Connection questions:? (***11? Small question, 21 points, tick "√" correctly and "×" wrongly) < P > 21. The nutrients contained in food refer to sugar, protein and fat. ()

22. The contents of various nutrients in different foods are different, and the contents of various nutrients in the same food are the same? ()

23. The basic substance of cells is protein. ()

24. The energy needed by human body is supplied by sugar. ()

25. The digestive system includes digestive glands and digestive juice. ()

26. Digestion refers to the process of food being absorbed in the digestive tract. ()

27. In the process of digestion, physical digestion is carried out first, and then chemical digestion is carried out. ()

28. Digestion in the mouth is the beginning of digestion, and a small amount of starch can be digested initially. ()

29. It is easy to get gastrointestinal diseases by engaging in strenuous exercise immediately after meals. ()

31. The function of plasma is to carry red blood cells, nutrients and metabolic wastes. ()

Third, thinking and expression: (This part ***4dj, title, ***41 points)

31. The following are the foods we often eat, please classify them accurately. (12 points) A. Chicken? B. potatoes C. cornmeal? D. walnuts e. tomatoes? F. lard G. banana H. milk M. yellow n. cake K. Apple Q. Peanut oil

(1) The foods with more sugar are: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _. (Write letters)

(2) The foods that contain more protein are: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _. (Write letters)

(3) Foods with more fat are: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _. (Write letters) (4) Foods with more vitamins are: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _. (writing letters)

32. The following table is an experiment on salivary amylase designed by a classmate. Please complete the following contents. ? (8 points)

(1) Please fill in the experimental phenomenon in the table:

A. Blue B. Constant blue

(2) The experimental phenomenon of test tube No.3 is because saliva contains _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

(3) tube l is a control experiment of tube _ _ _ _ _ _ _ _ _ _.

(4) From the experiments of No.2, No.3 and No.4 test tubes, we can know that _ _ _ _ _ _ _ _ _ _ _ _ _ _ can affect the activity of salivary amylase.

33. The following figure is a schematic diagram of the composition of human digestive system. Please fill in the serial number in [] and fill in the text on _ _ _ _ _ _. (16 points)

(1) The order of food passing through the digestive tract is: []? _ _ _ _ _ _ _ _, pharynx, esophagus, stomach, _ _ _ _ _ _ _, large intestine and anus.

(2) What is the largest digestive gland in human body? ________，? The _ _ _ _ _ _ _ it secretes does not contain digestive juice. Can it be used? _ _ _ _ _ _ _ _ _ _ _ into tiny droplets and add? Quickly digest it. What is the most important digestive gland in human body? [ ]? _ _ _ _ _ _ _ _ _ _ _ _ _, which can secrete and digest _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ and? Digestive enzymes of _ _ _ _ _ _.

(3)[ ]? ________、[ ]? _ _ _ _ _ _ _ _ and _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ The chemical solution contains enzymes that digest starch.

(4) Where does the starch begin to digest? [ ]? ________； Protein began to disappear? The part of the chemical is: []? ________； Where does the fat begin to digest: []? ________。

(5) What can accommodate a large amount of food in a short time? ________； Can peristalsis, can't digest is [? ]? ________。

(6) starch, protein and fat in []? _ _ _ _ _ _ _ has been thoroughly digested, and the final digested products are _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

34. Four people belonging to ABO blood system, A, B, C and D, went to the hospital for blood type examination, and were examined by doctors. The results are shown in the following figure respectively. Please judge the blood types of the four people according to the examination results of the hospital. ? (4 points)

A is _ _ _ _ _ _ _ _ _ blood;

b is _ _ _ _ _ _ _ _ _ _ blood;

c is _ _ _ _ _ _ _ _ _ _ blood;

d is _ _ _ _ _ _ _ _ _ _ blood;

answer: