4.5 Homeostasis and response

Practice questions on Homeostasis and response

• Explain how ethene and gibberellins are used by plants, and describe one commercial use of… (4 marks, Explain)
• Describe how gibberellins and ethene are used commercially in the food industry. In your a… (4 marks, Describe)
• Describe how the hormone insulin returns blood glucose levels to normal after a meal high … (4 marks, Describe)
• Explain why a person with Type 1 diabetes must inject insulin, whereas a person with Type … (4 marks, Explain)
• Explain how adrenaline prepares the body for a 'fight or flight' response. (4 marks, Explain)
• Describe how the hormone glucagon returns blood glucose levels to normal after they have f… (4 marks, Describe)
• Explain what is meant by a reflex action and why reflex actions are important for survival… (4 marks, Explain)
• Explain the roles of receptors, the central nervous system and effectors in producing a re… (4 marks, Explain)
• Explain how the central nervous system coordinates a response when a person touches a hot … (4 marks, Explain)
• Describe the pathway of a reflex action, from detection of a stimulus to the response of a… (4 marks, Describe)
• A person with Type 1 diabetes does not produce sufficient insulin. Explain how this affect… (4 marks, Explain)
• Explain why homeostasis is important for the normal functioning of the body. (4 marks, Explain)
• Explain how the body uses a negative feedback cycle to return blood glucose levels to norm… (4 marks, Explain)
• Explain how the hormone thyroxine is regulated in the body using a negative feedback cycle… (4 marks, Explain)
• Explain how auxin controls the growth of a plant root growing downwards in response to gra… (4 marks, Explain)
• Describe the roles of receptors, coordination centres, and effectors in maintaining homeos… (4 marks, Describe)
• Explain how thyroxine and negative feedback work together to maintain a stable metabolic r… (4 marks, Explain)
• Explain how auxin causes a plant shoot to grow towards a light source. (4 marks, Explain)
• Explain why a reflex action is described as both rapid and automatic. (4 marks, Explain)
• Explain how auxin causes a plant shoot to grow towards a light source. In your answer, ref… (4 marks, Explain)