2 Cells and control

Practice questions on Cells and control

• Explain the role of neurotransmitters in transmitting a nerve impulse across a synapse. (4 marks, Explain)
• Describe the roles of sensory neurones, the central nervous system (CNS), and motor neuron… (4 marks, Describe)
• Explain how a nerve impulse is transmitted from a motor neurone to an effector. (4 marks, Explain)
• A patient has been diagnosed with a blood disorder caused by faulty red blood cells. Docto… (4 marks, Explain)
• Describe how meristem tissue in plants is related to cell differentiation and explain why … (4 marks, Describe)
• Explain why the daughter cells produced by mitosis must be genetically identical to the pa… (4 marks, Explain)
• Explain what happens during interphase and why it is important for mitosis to occur succes… (4 marks, Explain)
• Describe the sequence of events that occur during mitosis, from the stage where chromosome… (4 marks, Describe)
• Explain how uncontrolled mitosis can lead to cancer and describe one consequence of this f… (4 marks, Explain)
• Explain why cells must replicate their DNA before mitosis can take place, and describe wha… (4 marks, Explain)
• Explain why embryonic stem cells are considered more useful than adult stem cells for trea… (4 marks, Explain)
• A footballer suffers a serious knee injury that destroys cartilage cells. A doctor explain… (4 marks, Explain)
• A scientist is growing human skin tissue in a laboratory to help treat patients with sever… (4 marks, Explain)
• Explain how the structure of a motor neurone is adapted to carry out its function efficien… (4 marks, Explain)
• Explain how a reflex arc protects the body from harm, referring to the role of neurones in… (4 marks, Explain)