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Question 3.8.1   Jim uses a sensor to measure his heart rate before he starts running. He starts running and measures his heart rate every five minutes. After his run, he draws a graph.       Use the graph to help you answer the question.   Click on the button below to open the picture of the graph.     What is Jim’s heart rate before he starts running? [ans1] beats per minute. (1)

Question 4.3   After nutrients have been broken down into smaller separate molecules, these molecules get absorbed into the body. Explain where the absorption of nutrients takes place and how it works. (2)

Question 5.1   When we eat unhealthy meals, it has a negative effect on our bodies. Name one disease which can risk increases with unhealthy eating. (1)

Question 3.8.3   Use the graph in Question 3.8.1 to help you answer the question.   Describe Jim’s heart rate between points X and Y on the graph. (1)

Question 5 Answer the following questions regarding healthy and unhealthy lifestyles:

Question 3.1   Choose the correct answer. The three main parts of the body involved in the circulatory system:   a.  Blood, stomach, heart b.  Liver, muscles, lungs c.  Blood, lungs, heart (1)

Question 5.2   Exercising has a positive impact on our heart, blood vessels and lungs. Explain how exercise can decrease the risk of heart disease. (2)

QUESTION 2:   A bag contains 5 red balls and 3 blue balls. Chris takes three balls at random from the bag, without replacement.   2.1 Sketch a tree diagram representing the events of taking the balls out of the bag. (Include all probabilities) (3) 2.2 Show that the probability of drawing exactly one red ball is . (4)      

ANSWER ALL QUESTIONS ON FOLIO LINE PAPER

QUESTION 5:   A committee of 6 people is to be chosen from 9 woman and 5 men:   5.1 Find the number of ways in which the 6 people can be chosen if there must be more woman than men on the committee.      (3) 5.2 The 9 woman and 5 men include a sister and a brother:     Find the number of ways in which the committee can be chosen if the sister and brother cannot both be on the committee.  (3)