This biology question covers important biological concepts and processes. The step-by-step explanation below helps you understand the underlying mechanisms and reasoning.
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Here are the solutions to the questions: QUESTION 4 4.1) Label the parts of the skin in the diagram below: 1. Epidermis 2. Dermis 3. Hypodermis (or Subcutaneous tissue) 4.2) Give two importance of the skin: • The skin provides protection against pathogens, UV radiation, and mechanical injury. • It plays a crucial role in thermoregulation by regulating body temperature through sweating and blood flow. QUESTION 5 5.1) For each nervous system, identify the organ in control from the list (List of organs: Brain, Heart, Oesophagus, and Spinal Cord): | Central Nervous System | Peripheral Nervous System | | :--------------------- | :------------------------ | | Brain | Heart | | Spinal Cord | Oesophagus | 5.2) Give three effects of alcohol on the nervous system: • Impaired coordination and balance. • Slowed reaction time and reflexes. • Impaired judgment and decision-making. QUESTION 6 6.1) State two effects of stress on Mr. Paul: • Increased heart rate and blood pressure. • Difficulty concentrating and irritability. 6.2) Give three ways Mr. Paul could reduce the effect of stress at his work post: • Taking short, regular breaks to rest and clear his mind. • Practicing relaxation techniques such as deep breathing or mindfulness during breaks. • Improving time management by prioritizing tasks and delegating when possible. QUESTION 7 7.1) Give two importance of a pictogram in a workshop: • Pictograms quickly communicate potential hazards and safety information, allowing for immediate recognition of risks. • They overcome language barriers, ensuring that safety warnings are universally understood by all workers regardless of their native language.