State two differences between sprain and strain. State two functions of the skin. Name two drugs that are harmful to man. State one function of each of the following officials in an athletics meet: (i) track referee; (ii) starter; (iii) marksman; (iv) field judge.

Here are the answers to the remaining questions:

2. a) (ii) Two differences between sprain and strain: I. A sprain is an injury to a ligament (tissue connecting bones), while a strain is an injury to a muscle or tendon (tissue connecting muscle to bone). II. Sprains often result from a sudden twist or fall, causing a joint to move beyond its normal range, whereas strains typically occur from overstretching or tearing a muscle or tendon due to overuse or sudden exertion.

   b) Two functions of the skin:
   I. Protection: The skin acts as a barrier against pathogens, UV radiation, and physical injury.
   II. Temperature Regulation: It helps maintain body temperature through sweating and by controlling blood flow to the surface.

   c) Two drugs that are harmful to man:
   I. Heroin
   II. Cocaine

3. a) State one function of each of the following officials in an athletics meet: (i) track referee: The track referee has overall charge of the track events and ensures that all rules are observed. (ii) starter: The starter is responsible for ensuring a fair start for all races and recalling athletes if there is a false start. (iii) marksman: The marksman records the distances or heights achieved by athletes in field events. (iv) field judge: The field judge supervises a specific field event, ensuring rules are followed and measurements are accurate.