| Date | November 2014 | Marks available | 1 | Reference code | 14N.1.SL.TZ0.27 |
| Level | Standard level | Paper | Paper 1 | Time zone | TZ0 |
| Command term | Question number | 27 | Adapted from | N/A |
Question
Which is a long-term effect of the human immunodeficiency virus (HIV) on the immune system?
A. Fewer bacterial infections
B. Fewer active lymphocytes
C. More antibody production
D. More antigen recognition
Markscheme
B
Examiners report
[N/A]
Syllabus sections
Show 78 related questions
- 17M.2.HL.TZ1.1f.ii: Suggest a reason for the greater expression of the gene for the urea transporter after an...
- 17M.2.SL.TZ1.6a: Explain how the small intestine moves, digests and absorbs food.
- 17M.2.SL.TZ1.1c: Estimate how much smaller drilled oysters raised in seawater at a high CO2 concentration were...
- 17M.1.HL.TZ2.32: Where is absorption of digested food carried out? I. Villi II. Pancreas III. Small...
- 17M.1.HL.TZ2.31: Where does the digestion of polypeptides start in humans? A. Mouth B. Esophagus C....
- 17M.1.HL.TZ1.23: Which organ in the human body secretes lipase, amylase and protease? A. Pancreas B....
- 17M.1.HL.TZ1.21: Glucose is absorbed through protein channels in the plasma membrane of epithelium cells in...
- 17M.1.SL.TZ2.27: The bacterium Neisseria gonorrhoeae causes infections related to the human reproductive...
- 17M.1.SL.TZ2.24: Which is a process occurring in the small intestine?
- 17M.1.SL.TZ1.21: Cladograms can be created by comparing DNA or protein sequences. The cladogram on the left is...
- 17N.2.SL.TZ0.05b: Discuss the roles of the enzymes secreted by the pancreas during digestion.
- 16M.2.HL.TZ0.3a: The image shows a transverse section of an intestinal wall at 100 x...
- 16N.2.HL.TZ0.2a: The image is an electron micrograph of the lining of the small intestine. (i) Label the...
- 16N.1.SL.TZ0.24: What is the main method of transport of monosaccharides such as fructose across the...
- 16M.1.HL.TZ0.34: In which process is “surface area” of key importance for humans? A. Reabsorption of glucose...
- 16M.1.HL.TZ0.33: What happens to starch in the small intestine? A. Endopeptidase secreted by the liver...
- 16M.1.SL.TZ0.25: The diagram shows the layers of the tissues in a transverse section of the human small...
- 15M.1.HL.TZ1.20: Some egg white protein was heated until it turned solid. It was then cooled and cut into four...
- 15M.1.SL.TZ2.25: The graph shows a correlation between the number of new cases of stomach cancer and vegetable...
- 15M.1.SL.TZ2.24: What are functions of the stomach, small intestine and large intestine?
- 15M.1.HL.TZ2.28: What are functions of the stomach, small intestine and large intestine?
- 15M.1.HL.TZ2.29: The graph shows a correlation between the number of new cases of stomach cancer and vegetable...
- 15N.1.SL.TZ0.24: What structures in the small intestine transport most fats? A. Collecting ducts B....
- 15N.1.HL.TZ0.20: What structures in the small intestine transport most fats? A. Collecting ducts B....
- 15N.2.SL.TZ0.4a: Draw a labelled diagram showing the interconnections between the liver, gall bladder,...
- 13M.1.HL.TZ1.20: Which enzyme is amylase?
- 13M.1.HL.TZ2.22: Where are structures I, II and III found in the human body?
- 13M.1.HL.TZ2.19: Enzymes produced by the pancreas could pass out of the body via the anus. Which route would...
- 13M.1.HL.TZ2.21: Why do nutrient molecules enter the blood? A. Blood carries nutrients to cells.B. Blood...
- 13M.2.SL.TZ2.5a: State the source, substrate, products and optimal pH condition for lipase in the human...
- 13N.1.HL.TZ0.20: What are features of the enzyme amylase?
- 13N.1.SL.TZ0.23: What are features of the enzyme amylase?
- 13M.1.SL.TZ1.25: Which label represents the lacteal?
- 13N.3.HL.TZ0.14b: Outline a mechanism used to transport products of digestion from the lumen of the ileum into...
- 11M.1.HL.TZ1.21: Celiac disease causes the destruction of the villi cells. Which of the following is most...
- 11M.1.SL.TZ1.25: Celiac disease causes the destruction of the villi cells. Which of the following is most...
- 11M.1.SL.TZ2.10: Which structure produces lipase? A. 1 B. 2 C. 4 D. 5
- 11M.1.SL.TZ2.9: Which organs are associated with the transformation of glucose into glycogen? A. 1 and 4 B....
- 12M.2.HL.TZ1.5b: Describe the importance of hydrolysis in digestion.
- 12M.2.HL.TZ2.5b: Outline the digestion, absorption and assimilation of proteins in humans.
- 12M.1.HL.TZ2.19: What is an important function of the lacteal in the villus? A. Secretion of mucus B....
- 12M.1.SL.TZ1.24: The diagram below shows the human digestive system. In which parts of the digestive system...
- 12M.1.SL.TZ2.28: What is an important function of the lacteal in the villus? A. Secretion of mucus B....
- 12M.2.SL.TZ1.5b: Describe the importance of hydrolysis in digestion.
- 09M.1.HL.TZ1.19: Which of the following parts of the digestive system secrete proteases?
- 09M.2.SL.TZ1.6c: Explain how the structure of a villus in the small intestine is related to its function.
- 09M.1.HL.TZ2.17: What is the main function of the large intestine? A. Absorption of waterB. Digestion of fats...
- 10M.1.SL.TZ1.24: Which of the following is correct for lipase?
- 10M.1.SL.TZ1.25: What processes occur during assimilation and absorption of lipids?
- 10M.1.SL.TZ2.24: Which feature increases the absorption of glucose in the small intestine? A. Villi B....
- 10M.2.SL.TZ1.7b: Plants store carbohydrate in the form of starch. Explain the reasons for starch being...
- 10M.2.SL.TZ2.1d (i): Identify which ion the moths are retaining in their body from the laboratory solutions.
- 10M.2.SL.TZ2.1e: The diagram below shows the digestive system anatomy of the male and female moth. Using...
- 10M.2.SL.TZ2.1d (ii): Compare the gain and loss of ions in the male moths which have drunk from laboratory...
- 10M.2.SL.TZ2.5c: Explain the importance of enzymes to human digestion.
- 10M.1.HL.TZ2.24: The diagram below shows water in the human body. Where in the digestive system is the...
- 14N.1.SL.TZ0.24: Colonic irrigation involves regularly flushing the large intestine with water. Why should...
- 14N.1.SL.TZ0.25: Which vessel carries deoxygenated blood from the heart to the lungs?A. Vena cavaB. Coronary...
- 14N.1.SL.TZ0.26: What role does the medulla of the brain have in controlling heart rate?A. To secrete...
- 14N.1.SL.TZ0.28: During expiration, how does air pressure in the lungs compare with atmospheric pressure?A....
- 14N.1.SL.TZ0.29: Where do motor neurons conduct impulses from and to?A. From effectors to the central nervous...
- 14N.1.SL.TZ0.30: What are increasing levels of progesterone responsible for during the female menstrual...
- 09N.1.HL.TZ0.20: The diagram below shows parts of the human digestive system. Which points are linked by...
- 11N.2.HL.TZ0.5 a: Draw a labelled diagram of the digestive system.
- 11N.1.HL.TZ0.27: Where does most assimilation take place? A. In cells B. In the mouth C. In the small...
- 11N.2.SL.TZ0.2a (i): Label the diagram to show the structure that is involved in digestion of proteins in acid...
- 11N.2.SL.TZ0.2a (ii): Label the diagram to show the structure where most absorption of water to prevent dehydration...
- 11N.2.SL.TZ0.2a (iii): Label the diagram to show the structure where most absorption of nutrients occurs (using the...
- 12N.2.SL.TZ0.5c: Describe the digestion of food in the human digestive system.
- 12N.1.SL.TZ0.25: A structure has a thin epithelium of one cell layer and contains a lacteal and blood...
- 10N.2.SL.TZ0.3b: Explain why digestion of large food molecules is essential.
- 10N.2.HL.TZ0.1a(ii): The activity of α-amylase was tested at successive concentrations of gibberellin. Determine...
- 09N.2.SL.TZ0.3b: Outline the need for enzymes in the digestive system.
- 09N.2.SL.TZ0.3c: State one function of the large intestine.
- 10N.3.SL.TZ0.16d: Suggest how antibiotic-resistant bacteria are passed from animals to humans.
- 09N.2.SL.TZ0.3a: Deduce from where in the human digestive system this enzyme was extracted.
- 09N.2.SL.TZ0.3d: Explain how the structure of the villus is adapted for absorption.
- 10N.3.HL.TZ0.7d: Suggest how antibiotic-resistant bacteria are passed from animals to humans.
