iGCSE Biology (0610)-14.4 Homeostasis – iGCSE Style Questions Paper 1 IGCSE Biology (0610) Practice Questions Paper 1 - All Chapters Question The diagram shows a section through human skin. What are the structures labelled X, Y and Z? ▶️Answer/Explanation Ans: B QuestionWhere is insulin secreted, and what is its effect on blood glucose concentration?▶️Answer/ExplanationAns D More IGCSE Biology (0610) Practice Questions Paper 1 ...........