K.C.S.E Biology Q & A - MODEL 2001PP1QN11

K.C.S.E Biology Q & A - MODEL 2001PP1QN11

 The diagram below represents a mammalian nephron

(a) Name the
(i) Structure labeled P
(ii) Portion of the nephron between point X and Y
(b) Name the process that takes place at point Q
(c) Name one substance present at point R but absent at point S in a healthy mammal
(d) The appearance of the substance you have mentioned in (c) above is a symptom of a certain disease caused by a hormone deficiency. Name the
(i) Disease
(ii) Hormone
(e) State the structural modifications of nephrons found in the desert mammals

answers

(a) (i) Efferent arteriole/ vessels
(ii) Loop of henle
(b) Ultra – filtration ( acc. Pressure filtration) rej. Filtration
(c) Glucose ( acc. Blood sugar)
(d) (i) Disease – diabetes  mellitus ( acc. Sugar  diabetes)
    (ii) Hormone – insulin
(e)  Small Bowman’s Capsule/ Groleruli`; Rej few Bowman’s capsule
    Loop of Henle