1 1 Complete the sentences about temperature control in humans by writing the missing words in the gaps. If body temperature increases above normal, .............................................. in the .............................................. detect the rise in temperature and impulses are sent to the skin. Glands in the skin produce a liquid called .............................................. . The main component of this liquid is water. The water in the liquid .............................................. from the surface of the skin using heat energy from the body. This lowers the body temperature. The maintenance of a constant body temperature is an example of .............................................. . [5] [Total: 5] 2 The diagram shows a section through the eye. List three parts of the eye that light passes through to reach structure X. 1 ............................................................................................................................................... 2 ............................................................................................................................................... 3 ............................................................................................................................................... [3] 2 [Total: 3] 3 The diagram shows the junction between two neurones with drug X absent and two neurones with drug X present, immediately after a painful stimulus. Describe and explain how drug X affects the function of the relay neurone shown in the diagram. .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. [3] [Total: 3] 3 4 Nervous coordination uses specialised cells called neurones. The diagram shows three neurones. Place ticks (✓) in the boxes that describe the human nervous system. includes the brain and spinal cord is made up of the brain, heart and spinal cord consists of the central nervous system only consists of the central and peripheral nervous system coordinated by hormones coordinates and regulates body functions [3] [Total: 3] 4 5 The table contains three descriptions of nervous system terms. Complete the table by stating the name of the terms described. description of term name of the term neurone that is connected to a muscle electrical signal that passes along a neurone junction between two neurones [3] [Total: 3] 6 Describe a simple reflex arc. .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. [4] [Total: 4] 7 The testes are part of the endocrine system because they produce hormones. State the name of the hormone released from the testes. .................................................................................................................................................. [1] [Total: 1] 5 8 Complete the five sentences about the eye and the nervous system. Structures in the eye change the shape of the lens so that the eye can focus on near and distant objects. This is called .............................................. . The radial and circular muscles in the iris of the eye are a pair of .............................................. muscles that work against each other. Muscles in the eye are controlled by the nervous system. The .............................................. nervous system contains only sensory and motor neurones. The .............................................. nerve from the eye contains sensory neurones that conduct impulses to the .............................................. . [5] [Total: 5] 9 The body is regulated by both the nervous system and by hormones. The table shows information about the names of hormones, where they are produced and their actions in the body. Complete the table. name of hormone insulin where the hormone is produced in the body action the hormone has in the body pancreas adrenal gland widened pupils, increased heart rate, raised blood glucose concentration testosterone [4] [Total: 4] 6 10 This question is about neurones and reflex actions. Choose words from the list to complete the sentences. Each word may be used once, more than once, or not at all. endocrine motor fast nervous slow impulses receptor stimuli sensory synapses Neurones are cells that are part of the ............................................... system. There are three types of neurone involved in a simple reflex action: a sensory neurone, a relay neurone and a ............................................... neurone. The nerves conduct electrical ............................................... . These are transmitted from one neurone to the next at junctions called ............................................... . A reflex action is automatic, co-ordinated and ............................................... . [5] [Total: 5]
