GCSE Grade - Exam QA

1 GCSEAQA - Combined ScienceGradeMaterialsFor this paper you must have:RulerPencil and RubberScientific calculator, which you are expected to use when appropriateInstructionsAnswer all questionsAnswer questions in the space providedAll working must be shownInformationThe marks for the questions are shown in bracketsName:BIOLOGYMarkDate:B5 - Test 1 HOMEOSTASIS AND table below shows how the body loses water. HOW WATER IS LOST% (PERCENTAGE)Breathing10 Faeces5 Sweat45 Urine401. Complete the diagram by showing the water loss for breathing, sweat and urine. (Total 3 marks)Page 1 of can be used to control fertility in A gives the names of three B gives some information about the one line from each hormone in List A to the correct information about the hormone in ListB.

2 List AHormone List BInformation (Total 3 marks) 2 of bar chart shows different ways in which water is lost from and gained by the body on volumes of water lost in the sweat and in the breath are labelled on the bars. 3.(a) How much water was lost in the urine and faeces? _____ cm3(1)(b) Water is lost from the body in urine, faeces, sweat and was the total volume of water lost from the body on this day?Show clearly how you work out your = _____ cm3(2)Page 3 of (c) The volume of water lost should balance the volume of water should the person do to balance the water gained with the water lost?_____(2)(Total 5 marks)Hormones are involved in controlling the menstrual cycle and fertility.(a) (i) Use the correct answer from the box to complete the sentence.

3 Auxin follicle stimulating hormone (FSH) thalidomideA hormone produced by the pituitary gland is _____(1)4.(ii) Use the correct answer from the box to complete the sentence. luteinising hormone (LH) oestrogen statinA hormone produced by the ovaries is _____(1)(b) (i) Why are fertility drugs given to some women?_____(1)(ii) A doctor injects fertility drugs into a woman. After the injection, the hormones travelto the woman s do the hormones travel to the ovaries?Draw a ring around the correct answer. through the bloodstreamthrough the neuronesthrough the skin(1)Page 4 of (c) Which two hormones are used in contraceptive pills?Tick ( ) two boxes. FSH oestrogen LH progesterone (2)(Total 6 marks)Some people with diabetes do not produce enough insulin to keep their blood glucose at thecorrect levels.

4 (a) (i) Which organ monitors blood glucose levels? Tick ( ) one box. liverpancreasskin(1)5.(ii) What effect does insulin have on glucose in the blood? Tick ( ) one box. insulin causes glucose to move into the increases the amount of glucose in the converts glucose to starch.(1)Page 5 of (b) Some people with diabetes inject insulin several times a are different types of graph shows some information about three different types of insulin , A, B and C. (i) Which type of insulin , A, B or C, should a person with diabetes inject just beforeeating a meal high in carbohydrates?_____Give a reason for your (2)(ii) A woman with diabetes has a blood glucose level of 12 mmol per dm3 of woman s normal blood glucose level is 6 mmol per woman will need to inject insulin to lower her blood glucose each unit of insulin injected the blood glucose level will fall by 3 mmol per many units of insulin does the woman need to inject to bring her blood glucoselevel down to the normal level?

5 _____Number of units = _____(1)Page 6 of (c) Some people have pancreas transplants to treat one possible disadvantage of a pancreas transplant. Tick ( ) one box. The pancreas could be patient will need to inject insulin every patient s blood glucose levels may rise and fall too much.(1)(Total 6 marks)The nervous system allows humans to react to their surroundings.(a) Sense organs have receptors. Receptors detect changes in the word describes a change in the environment?Draw a ring around one effector a neurone a stimulus(1) 7 of (b) The photograph shows a A, B, C, D and E show some of the baby s sense organs. Photo by D. Sharon Pruitt [ ], via Wikimedia CommonsAnswer each question by writing one letter, A, B, C, D or E, in each box.

6 (i)Which sense organ has receptors sensitive to light? (1)(ii) Which two sense organs have receptors sensitive to chemicals?(2) and (iii) Which sense organ has receptors sensitive to changes in the baby s position? (1)Page 8 of (c) Information from sense organ A is passed along nerve information is coordinated to produce a organ in the body coordinates the information?_____(1)(Total 6 marks)Car drivers need quick reactions to avoid student uses a computer program to measure reaction computer screen shows a traffic light on red. The traffic light then changes to diagram below shows the change the person sees on the computer screen. When the traffic light changes to green the person has to click the computer mouse as quickly computer program works out the time taken to react to the light changing colour.

7 (a) Special cells detect the change in colour.(i) What word is used to describe special cells that detect a change in the environment?Draw a ring around the correct answer. (1)7.(ii) Where in the body are the special cells that detect the change in colour of the trafficlights?_____(1)Page 9 of (b) The student used the computer program on one computer to measure the reaction times ofpeople of different ages.(i) Give one variable the student should control so that a fair comparison can be madebetween the people of different (1)(ii) The student did each measurement three times to calculate a mean table shows the results. Age in yearsMean reaction timein milliseconds1524230 45221602587536490526 The reaction times for the 30-year-old person were 192, 174 and 180 the mean reaction time of the 30-year-old reaction time = _____ milliseconds(1)Page 10 of (iii) Which one of the following is an advantage of repeating each test three times andnot doing the test just once?

8 Tick ( ) one box. Any anomalies can be results will be more will be no errors.(1)(iv) Some people think that old people should not be allowed to drive a is it more dangerous for old people to drive cars?Use information from the table above to support your (2)(Total 7 marks)A student investigated her reaction computer measured how quickly she clicked the mouse when she detected each of threedifferent stimuli as shown in the diagrams. 11 of (a) Give the stimulus each sense organ detected in this each sentence using the correct word from the box. chemicalslightsoundtouchReceptors in her eyes detected _____ .Receptors in her ears detected _____ .Receptors in her skin detected _____ .(3)(b) Each sense organ was tested 4 times and the mean reaction times were table shows the results.

9 Reaction time for each sense organ in seconds EyesEarsSkinTest reaction time (i) There is one anomalous result in the a ring around the anomalous result.(1)(ii) Calculate the mean reaction time for the reaction time for the eyes = _____ seconds(2)(iii) Give one conclusion you can make from these (1)(Total 7 marks)Page 12 of person with Type 1 diabetes does not produce enough of the hormone insulin .(a) Where is the hormone insulin produced?Tick one box. BrainPancreasPituitaryThyroid(1)9.(b) How does insulin travel around the body?_____(1)Page 13 of (c) The same concentration and volume of glucose solution was given to two people. Person with Type 1 diabetes. Person without Type 1 figure below shows how the blood glucose concentration of these two people changedafter they each drank a glucose solution.

10 Look at the figure the blood glucose concentrations of the two similarities and differences in your 14 of (4)(d) People with diabetes may be asked to control their how this can help to reduce the risk of developing health (3)(Total 9 marks)The concentration of glucose in the blood is controlled by homeostasis.(a) Give one other example of an internal condition controlled by (1) graph below shows the change in glucose concentration in the blood of a person with Type 1diabetes. Page 15 of (b) Calculate the increase in blood glucose concentration between 1 pm and 2 in blood glucose = _____ mmol/dm3(1)(c) Suggest at what time the person ate the graph (1)(d) Name the hormone the person injected that caused the blood glucose concentration (1)(e) Explain the decrease in blood glucose concentration after the hormone was all the words in the box in your explanation.