Allow about 30 minutes for this part. Use the multiple-choice answer sheet for Questions 1–15. 2 What is a role of microflora on human skin. A) To produce hormones (B) To control body temperature (C) To protect the body from disease (D) To regulate the production of oils. 3 What is the main purpose of surfactants in shampoo. A) To emulsify oil and dirt (B) To increase the shine of hair. C) To improve the appearance of shampoo (D) To increase the foaming power of shampoo. Non-greasy Moisturiser Ingredients: water, oil,. Why would this moisturiser feel non-greasy on the skin. B) It is a water-in-oil emulsion. C) It is an oil-in-water emulsion. D) The oil evaporates after application. 5 Which alternative identifies the features of a solution. 6 What is a structural characteristic of alveoli. A) Flexible cartilage (B) Large surface area (C) Tough muscular tissue (D) Thick coating of mucus. 7 Jake could not find his two front teeth after they were knocked out in an accident. Which biomedical device would the dentist use to replace the lost teeth. 8 Why would a doctor decide to fit a 75-year-old patient with a cemented hip replacement. A) Bone growth decreases with age. B) Bone growth increases with age. C) Cemented implants allow for bone growth. D) Non-cemented implants put more pressure on the bone. 9 The pie charts represent the differences in the concentration of the three main gases in inhaled and exhaled air. What is the best conclusion you can draw from the information given above. A) The concentration of oxygen has changed the least. B) Oxygen concentration is greater in exhaled air than inhaled air. C) Carbon dioxide concentration is greater in inhaled air than exhaled air. D) The concentration of carbon dioxide is 100 times greater in exhaled air than inhaled air. Get Smart You will Succeed: Senior Science, V. 10 What will happen as a result of faulty heart valves. A) The heart rate will slow down. B) Blood will flow from the atria into the arteries. C) Blood will flow from the ventricles into the atria. D) The heart will not contract with a regular rhythm. 11 Which of the following correctly classifies the information system. Information system Verbal or non-verbal. Drums Verbal Long distance Non-electronic. Mobile phone Verbal Long distance Electronic. School loudspeaker Verbal Short distance Non-electronic. TV Non-verbal Long distance Electronic. 12 Which graph best represents a digital code. 13 Which sequence best represents information transfer in telephone communication. A) Message →code →decoder →transmission →message (B) Message →decoder →transmission →code →message (C) Message →code →transmission →decoder →message (D) Message →transmission →code →decoder →message. Centre Number Section I – Part B (continued). Air in the lungs is full of water vapour, which coats the alveoli in a thin layer. The water in this layer helps to reduce the diameter of the alveoli, which pushes some air out. To prevent the alveoli from collapsing completely, they produce surfactant. If the alveoli collapse, they are unable to fill with air. a) Explain how the water layer reduces the diameter of the alveoli to make them smaller. b) Scientists have found that cigarette smokers have less surfactant in their lungs than non-smokers.
Some students were asked to plan and perform a first-hand investigation to determine the time it takes for the heart to return to its resting rate after exercise. Centre Number Section I – Part B (continued). Non-invasive medical techniques have been developed to reduce the risks to patients while diagnosing their medical problems. Evaluate this statement, using specific examples. a) Outline the principle of total internal reflection. b) Explain reasons for the increased use of fibre optics in communication.
To test the effectiveness of the bacteriocin, a small disc of paper which has been soaked in the bacteriocin is placed onto the surface of an agar plate. If the bacteriocin works, the area around the disc will become clear where the micro-organisms have died.
The table below shows the results for four new bacteriocins. Bacteriocin Micro-organisms most affected. i) Which bacteriocin would be the most suitable for use in freshly squeezed orange juice. ii) Propose another condition which should be considered when choosing the bacteriocin. Give a reason for your answer. c) Discuss the impacts on society of Government food labelling regulations. d) The following article was published on the internet. i) Outline how you could assess the reliability of the information presented in this article. ii) Design a first-hand investigation to test one of the claims made in this article. iii) Propose future directions of research relating to the incidence of foodborne illnesses. Fast food restaurants and salad bars, rare 50 years ago, are today a primary source of food consumption for many Australians. In Australia, it is estimated that the number of food service outlets has grown 57 per cent with Australians spending 30 per cent of their food budget on take-away food and dining out. Around sixty to eighty per cent of foodborne illnesses arise from take-away food or dining out. Studies in New South Wales have shown that a history of eating out in the week before the onset of gastroenteritis was associated with a significantly increased yield of Salmonella and Campylobacter. Consequently, with the increasing trend towards take-away food and dining out, there is the likelihood of increasing numbers of people contracting foodborne illnesses. a) Zac stood on some broken glass. The following diagram shows a nerve pathway (not to scale) from an area of skin that was cut. i) What is this type of nerve pathway called. ii) Copy and complete the flow chart in your writing booklet.
The student recorded the time taken for the analgesic to fully dissolve under each condition. Time to dissolve (minutes) Analgesic Dispensing. Soluble Soluble Capsule Enteric-coated. i) Select the analgesic that would provide the fastest pain relief. ii) Propose another condition that could be tested to determine how quickly an analgesic will be absorbed by the body. c) Assess the impacts on society of increased bacterial resistance to antibiotics.
Time to dissolve (minutes) Analgesic Dispensing. Soluble Soluble Capsule Enteric-coated. i) Select the analgesic that would provide the fastest pain relief. ii) Propose another condition that could be tested to determine how quickly an analgesic will be absorbed by the body. c) Assess the impacts on society of increased bacterial resistance to antibiotics. d) The following article was published on the internet. i) Outline how you could assess the reliability of the information presented in this article. ii) Design a first-hand investigation to test one of the claims made in this article. iii) Outline the contribution of one scientist to our understanding of disease caused by bacteria. ii) Copy and complete the table in your writing booklet, identifying technologies used to produce weather maps.
Get Smart You will Succeed: Senior Science, V. b) The table shows some properties of three types of earthquake waves. Type of wave Average speed of travel. This seismograph was produced when an earthquake hit a densely populated city at 10.30 am on a weekday. i) Using the seismograph and the table, calculate the distance (speed × time) between the epicentre and the seismometer which produced this seismograph. ii) Propose TWO hazards that may be faced by emergency services as they carry out their role after the earthquake. Give reasons for your answer. c) Discuss the impacts on society of warning devices that can be used to detect disasters. d) The following article was published on the internet. i) Outline how you would assess the reliability of the information presented in this article. ii) Design a first-hand investigation to test one of the claims made in this article. iii) Propose future directions of research into the control and prevention of bushfires. a) (i) What is the force that keeps Earth’s atmosphere in place. ii) Draw diagrams in your writing booklet to model the relative distance of particles in a solid, a liquid, a gas and in space. b) When astronauts go into space they still need to exercise in order to minimise the loss of their muscle mass. Time spent on exercise each day (minutes). i) Which exercise program would be the most appropriate for minimising the loss of muscle mass. ii) Propose another body system which would need to be maintained in order to allow the astronauts to live a normal life on their return to Earth. Give a reason for your answer. c) Assess the impact on society of space research and exploration programs.
Time spent on exercise each day (minutes). i) Which exercise program would be the most appropriate for minimising the loss of muscle mass. ii) Propose another body system which would need to be maintained in order to allow the astronauts to live a normal life on their return to Earth. Give a reason for your answer. c) Assess the impact on society of space research and exploration programs. d) The following article was published on the internet. The amazing Space Pen® was adopted by scientists at NASA who needed to find a pen that would work in zero gravity. The pen has since been used successfully by several astronauts during missions on the space shuttle. The Space Pen® is superior in design compared to other types of pens and this makes it a better pen for all applications. The Space Pen® will write for twice as long as other types of pens and can write at any angle. The amazing Space Pen® is now available to consumers and is less expensive than you may think. We guarantee that the amazing Space Pen® is the best pen that you will ever own. i) Outline how you could assess the reliability of the information found in this article. ii) Design a first-hand investigation to test one of the claims made in this article. iii) Outline the contribution made by one space mission to our understanding of the solar system and the universe.
