Question

(a) Blood glucose concentration is controlled so that it remains within set limits.
      State the name given to this type of control.

(b) Fig. 4.1 shows the blood glucose concentration of a person after they have eaten a meal.

    Complete the sentences to describe and explain the changes seen in Fig. 4.1.
    Carbohydrates such as starch are broken down by the enzyme ……………………. to form simpler sugars.
    These simpler sugars are absorbed into the blood. After 30 minutes, the blood glucose concentration reaches a maximum of ……………………… mmol/dm3 .
    The increase in blood glucose concentration is detected and the hormone insulin is released from the ………………………………………… .
    Insulin causes glucose to be converted to ………………………………………… .
    This is then stored in the ………………………………………… reducing the blood glucose concentration to its previous level.

(c) State the names of two hormones that increase blood glucose concentration.

(d) State the name of the component of blood that transports hormones.

(e) Table 4.1 compares nervous and hormonal control.
      Complete Table 4.1.