(a)[4]
Explain the patterns in Fig. 9.1.
(b)[4]
Outline how the endocrine system differs from the nervous system.
Biology 9700 · AS & A Level · Control and coordination in mammals
Control and coordination in mammals — practice question
Antidiuretic hormone (ADH) helps keep blood water potential constant. A student drank $0.5\,\text{dm}^3$ of water, and the concentration of ADH in the student’s blood was recorded every $30$ minutes over $3$ hours. Fig. 9.1 presents the findings of this investigation.