Question

(a) Table 10.1 shows the effect of adrenaline on blood glucose concentration.

(i) Calculate the percentage increase in blood glucose concentration after an injection of  adrenaline.

                                                                                              ……………………………………………… % 
(ii) Suggest the target organ of adrenaline that causes the change shown in Table 10.1.
…………………………………………………………………………………………………………………..

(iii) Change in blood glucose concentration is one effect of adrenaline.
State two other effects of adrenaline on the body.

1 …………………………………………………………………………………………………………………
2 ………………………………………………………………………………………………………………….

(iv) State the name of the component of blood that transports adrenaline.

…………………………………………………………………………………………………………………….
(b) Chemicals also control activities in plants.
(i) State one example of chemical control of plant growth in response to a stimulus.
…………………………………………………………………………………………………………………….

(ii) State the name of the chemical that controls growth in plant shoots.

…………………………………………………………………………………………………………………….

(iii) Complete the definition of the term growth.

Growth is a permanent increase in size and …………………………………………………….
by an increase in ………………………………………………………………………………………….. .

▶️Answer/Explanation

Ans:  10(a)(i) (1200 – 800) = 400 ;
((400/800) × 100) = 50 (%) ;

10(a)(ii) liver ; 
10(a)(iii) any two from:

widen pupils / pupils dilate ;
increases pulse rate / increases heart rate ;
AVP ;;

10(a)(iv) plasma ; 
10(b)(i) phototropism / gravitropism ; 
10(b)(ii) auxin ; 
10(b)(iii) dry mass ;

cell size / cell number ;