All candidates must answer this section. Using examples, describe how hormones can influence their own secretion. Discuss the factors which affect fertility in the female mammal up to the point of successful conception. Discuss the changes that occur in the fetal circulation at birth to enable it to function in post-natal life, and how they are brought about. Discuss the neural mechanisms by which an animal localises the source of a sound.
All questions carry equal marks.
Start each answer on a new sheet and write on both sides of the paper. Tie up the answer to each question separately , with its own cover-sheet, with both the question number and your candidate number written on it. Complete the master cover sheet , listing all the questions you have answered. Do not write your name, college or other identifying material on any answer paper or cover sheet. You must answer Question 1.