Hormones and the Pancreas (OCR A-Level Biology A): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
ShowHide
Practise the questions
10 questions from this quiz
Which term describes the pancreas secreting hormones directly into the bloodstream?
Which term describes the pancreas secreting hormones directly into the bloodstream?
Endocrine gland
Which cells in the islets of Langerhans secrete insulin?
Which cells in the islets of Langerhans secrete insulin?
Beta cells
What is the normal blood glucose concentration range in healthy individuals?
What is the normal blood glucose concentration range in healthy individuals?
4-8 mmol dm⁻³
What is the primary effect of insulin on blood glucose concentration?
What is the primary effect of insulin on blood glucose concentration?
Decreases it
What does the term 'glycogenolysis' mean?
What does the term 'glycogenolysis' mean?
Glycogen breakdown
Which process creates new glucose from non-carbohydrate molecules like amino acids?
Which process creates new glucose from non-carbohydrate molecules like amino acids?
Gluconeogenesis
Why must blood glucose concentration be carefully controlled?
Why must blood glucose concentration be carefully controlled?
Energy availability & osmotic balance
What happens when blood glucose falls below 4 mmol dm⁻³?
What happens when blood glucose falls below 4 mmol dm⁻³?
Alpha cells secrete glucagon
Why do hormones like insulin use a second messenger system?
Why do hormones like insulin use a second messenger system?
They can't cross cell membranes
What advantage does the second messenger system provide?
What advantage does the second messenger system provide?
Signal amplification