12.2 Explain why breathing rate is higher after exercise. (3)

9.2 Which letter shows the tube that contains urine? (1)

6.7 Suggest two advantages of using the new artificial heart pump compared to previous artificial heart pumps. (2)

  TENEO INTERNATIONAL SCHOOL     SUBJECT:  iBIOLOGY     DATE: 16 JULY 2021     TIME: 100 MINUTES + 10 MINUTES SUBMISSION TIME + 10 MINUTES TECHNICAL TIME     MARKS: 90 MARKS     EXAMINER: R. ISMAIL     MODERATOR: K. GREEN         INSTRUCTIONS   1. The answers you provide to the question paper, must be your own, original work. No copying from any source is allowed. No marks will be awarded for work that is copied   2. Read all the questions carefully.   3. Use the mark allocation as a guide to how much information is required in your answers.   4. You may use a calculator, if necessary, but always show all working out.   5. This paper consists of two sections:  Section A: Section B:   6. Answer all the questions – do not leave any blank.  

6.3 Describe how the blood in the left side of the heart differs from the blood in the right side of the heart. (2)

9.1 Identify parts labelled A, B and C. (3)   A –     B –     C –  

7.6 State one way in which the grade 10 learners ensured the reliability of this investigation. (1)

2.4 Anaerobic respiration produces more energy than aerobic. (1)

5.1 Complete the table, which shows what happens in the thorax during ventilation of the lungs. Two boxes have been completed for you. (10)   Action during inhalation Action during exhalation External intercostal muscles contract Internal intercostal muscles Ribs move down and in Diaphragm Volume of thorax Volume of air in lungs

6.1 Name two of the blood vessels that carry blood away from the heart. (2)