ONE EIGHTH CONTEST 2025
Prempeh College - 62 points
Suhum SHTS - 37 points
Benkum SHS - 13 points
ONE EIGHTH CONTEST 2025
Mfantsipim School - 53 points
Anglican SHS, Kumasi - 37 points
Sogakope SHS - 24 points
ONE EIGHTH CONTEST 2025
Adisadel College - 82 points
St. Hubert Seminary SHS - 24 points
Serwaa Nyarko Girls' SHS - 24 points
ROUND 2
SPEED RACE
QUESTION
3. Name the process involved in the negative feedback loop when blood glucose concentration in humans is low
ANSWER: Glycogenolysis
EXPLANATION
3. When blood glucose levels drop, the pancreas releases glucagon, a hormone that signals the liver to break down stored glycogen into glucose. This breakdown process is called glycogenolysis, and it increases blood glucose back to normal — part of a negative feedback loop.
PRACTICE QUESTIONS
1. Which hormone lowers blood glucose?
ANSWER: Insulin.
2. Which hormone raises blood glucose?
ANSWER: Glucagon.
3. Which cells of the islets of Langerhans make insulin?
ANSWER: The beta cells.
4. Which cells of the islets make glucagon?
ANSWER: The alpha cells.
5. What is glycogenesis?
ANSWER: The conversion of glucose to glycogen.
6. What is gluconeogenesis?
ANSWER: The making of glucose from non-carbohydrate substances.
7. What is the normal fasting blood glucose level?
ANSWER: About 4 to 6 millimoles per litre.
8. Which organ stores glycogen?
ANSWER: The liver (and muscles).
9. Which hormone from the adrenal gland raises blood glucose?
ANSWER: Adrenaline.
10. What type of control keeps blood glucose steady?
ANSWER: Negative feedback.
11. Name two symptoms of diabetes.
ANSWER: Thirst and frequent urination.
12. What is a glucose tolerance test?
ANSWER: A test that shows how quickly the body clears a glucose dose from the blood.