B3.3 Homeostasis稳态.docx

B3.3 Homeostasis稳态1 This question is about keeping things inside the body the same.(a) Which word means maintenance of a constant internal environment? Put a tick () in the correct box. 1(b) Which two are examples of conditions inside the body that need to be kept constant? Put ticks () in the two correct boxes. 1(c) Which two activities are most likely to affect the maintenance of a constant internal environment?Put ticks () in the two most correct boxes. 2(d) The following diagram shows parts of the human body involved in controlling our body temperature.Ian puts out his hand to feel the heat from a fire. (i) Add labels to the boxes, 1, 2 and 3, to identify the parts involved. Choose from this list.effector processing centre receptor synapse 3 (ii) Draw an arrow in the circle to show the direction the nerve impulse travels. 1 (iii) An animal responds to a stimulus. Which of the following methods could be used to investigate this?Put ticks () in the boxes next to the three best answers. 3 Total: 111 This question is about keeping things inside the body the same.(a) Name the process which means maintenance of a constant internal environment. 1(b) Which conditions inside the body need to be kept constant? Put ticks () in the boxes next to the three correct answers. 1(c) The internal environment is often controlled by negative feedback. Which two statements describe negative feedback?Put ticks () in the boxes next to the two best answers. 2(d) Negative feedback mechanisms are involved in controlling the amount of light entering the eye. The diagram shows negative feedback between the brain and the eye. Draw straight lines to join each of the labels, 1, 2, 3 and 4, to the correct part of the diagram. 4 Total: 81 Sophie takes part in an exercise class.(a) Changes in Sophies body temperature cause her to sweat during the exercise. The changes are detected and processed. Complete the sentences describing how this happens. Choose words from the list.Some words may be used once, more than once, or not at all.brain heart kidneys liver lungs skinChanges in the temperature of the blood are detected by temperature receptors in the . .Changes in the external temperature are detected by temperature receptors in the . .Information received from the temperature receptors is processed by the . . 2(b) Sophie loses water when she sweats. How can Sophie replace some of this lost water?Put a ring around the correct answer.breathing growing respiring excreting urine 1(c) Sweating is involved in homeostasis. What is homeostasis?Draw two straight lines to link the correct beginning, middle and end to complete the sentence. 2 Total: 59 Look at the picture. It shows cells in human blood.(a) Write down the job of red blood cells.1(b) Blood is moved around the body in blood vessels called arteries.Write down the name of one other type of blood vessel.1(c) Write down the name of the organ that pumps blood around the body.1(d) Each white blood cell contains a nucleus. Write down the job of the nucleus in a cell