(i) Give a simple definition of the term excretion. (ii) Against each substance in the list below, write the letter E if you think the substance is excreted; S if you think it is secreted. Tears ......................... Urea .......................... Sweat ........................ Renin ...................... [4 MARKS]

(i) Give a simple definition of the term excretion. (ii) Against each

1.	(i) Give a simple definition of the term excretion. (ii) Against each substance in the list below, write the letter E if you think the substance is excreted; S if you think it is secreted. Tears ......................... Urea .......................... Sweat ........................ Renin ...................... [4 MARKS]
Answer» (i) Give a simple definition of the term excretion. (ii) Against each substance in the list below, write the letter E if you think the substance is excreted; S if you think it is secreted. Tears ......................... Urea .......................... Sweat ........................ Renin ...................... [4 MARKS]