| Date | November 2014 | Marks available | 1 | Reference code | 14N.1.SL.TZ0.28 |
| Level | Standard level | Paper | Paper 1 | Time zone | TZ0 |
| Command term | Question number | 28 | Adapted from | N/A |
Question
During expiration, how does air pressure in the lungs compare with atmospheric pressure?
A. Lung air pressure is greater than atmospheric pressure.
B. Lung air pressure is less than atmospheric pressure.
C. Lung air pressure starts below atmospheric pressure and rises above it.
D. Lung air pressure starts above atmospheric pressure and falls below it.
Markscheme
A
Examiners report
Most candidates believed that the lung air pressure falls below atmospheric pressure after expiration. This is incorrect, as it reaches the atmospheric pressure.
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.TZ0.27: Which is a long-term effect of the human immunodeficiency virus (HIV) on the immune system?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.
