K.C.S.E Biology Q & A - MODEL 2019PP1QN11

K.C.S.E Biology Q & A - MODEL 2019PP1QN11

Explain each of the following physiological observations:
(a) sportsmen release little, concentrated urine at the end of a strenuous exercise 
(b) a rabbit has a higher oxygen demand than a camel 

answers

​(a) during /after the exercise one sweat ; (profusely to cool the body/eliminate some nitrogenous (wastes) a lot  of  water is lost through this ; one is dehydrated ;(the little) water that is left in the body system (further) selectively reabsorbed in the kidney tubules (resulting in less but concentrated urine;)
(b) a rabbit has a higher surface area to volume ratio/ smaller in size hence has a bigger surface area exposed to heat loss to the environment/ lose heat faster/ its more active than the camel; hence need more oxygen to(aerobically) respire (to synthesize the needed energy to support its activity /lifestyle;