Question 1:

The breakdown of the uterus wall lining (endometrium) over 3 to 4 days is the process of menstruation — the shedding of the uterine lining if no pregnancy has occurred.

• A. Ovulation – Release of an egg from the ovary.

• B. Menstruation – ✅ Correct; monthly breakdown and shedding of the endometrium.

• C. Fertilisation – Fusion of sperm and egg.

• D. Maturation – Development of the egg (oogenesis) in the ovary.

✅ Answer: B. Menstruation

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 2:

The hormone that stimulates the thickening and rebuilding of the uterus lining (endometrium) is oestrogen.

• A. Luteinising hormone (LH) – Triggers ovulation and corpus luteum formation.

• B. Follicle stimulating hormone (FSH) – Stimulates egg follicle growth in the ovary.

• C. Oestrogen – ✅ Secreted by developing follicles; causes endometrium to proliferate and thicken.

• D. Progesterone – Maintains and prepares the endometrium for implantation after ovulation, but the initial buildup is driven by oestrogen.

Answer: C. Oestrogen

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 3:

The hormone that stimulates the ovary to produce oestrogen is Follicle Stimulating Hormone (FSH).

• A. Luteinising hormone (LH) – Triggers ovulation and stimulates progesterone production after ovulation.

• B. Follicle Stimulating Hormone (FSH) – ✅ Stimulates follicle growth in the ovary; these follicles then produce oestrogen.

• C. Oestrogen – Negative/positive feedback on pituitary, but does not directly stimulate ovarian oestrogen production.

• D. Progesterone – Mainly acts on the uterus, not on oestrogen production.

✅ Answer: B. Follicle Stimulating Hormone FSH

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 4:

The hormone that triggers the release of a mature egg from the ovary (ovulation) is Luteinising Hormone (LH).

• A. Luteinising hormone (LH) – ✅ Correct; a surge in LH causes the mature follicle to rupture and release the egg.

• B. Follicle stimulating hormone (FSH) – Stimulates follicle growth and oestrogen production, not ovulation directly.

• C. Oestrogen – Helps regulate the menstrual cycle and triggers the LH surge, but does not directly cause ovulation.

• D. Progesterone – Maintains the uterine lining after ovulation; not involved in triggering ovulation.

Answer: A. Luteinising hormone LH

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 5:

After ovulation, the hormone responsible for maintaining the lining of the uterus wall (endometrium) is progesterone.

• A. Luteinising hormone (LH) – Triggers ovulation, but then declines.

• B. Follicle stimulating hormone (FSH) – Stimulates follicle growth, not uterine lining maintenance.

• C. Oestrogen – Builds up the lining before ovulation, but progesterone is key for maintenance afterward.

• D. Progesterone – ✅ Secreted by the corpus luteum after ovulation; it thickens and maintains the endometrium to support a possible pregnancy.

Answer: D. Progesterone

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 6:

Let’s review the effects of oestrogen in the menstrual cycle:

1. On FSH – Oestrogen (at moderate to high levels) reduces FSH secretion via negative feedback on the pituitary gland.

2. On LH – Oestrogen initially suppresses LH, but when oestrogen levels peak, it triggers a positive feedback surge in LH (leading to ovulation).

Now check each option:

• A – Reduces FSH ✅ / Increases progesterone ❌ (Oestrogen does not directly increase progesterone; LH causes progesterone rise after ovulation).

• B – Increases FSH ❌ (wrong – oestrogen reduces FSH) / Causes uterine lining to break down ❌ (oestrogen builds it up, does not break it down).

• C – Increases LH ✅ (true for the LH surge) / Increases progesterone ❌ (same as A).

• D – Reduces FSH ✅ / Increases LH ✅ (true for the positive feedback at high oestrogen levels before ovulation).

✅ Correct answer: D – Reduces FSH and increases LH.

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 7:

The diagram shows the foetus connected to the mother via an organ that allows nutrient, gas, and waste exchange.

• A. Umbilical cord – Connects foetus to placenta, but the cord itself is not the organ where exchange occurs.

• B. Uterus – The organ where the foetus develops, not the connection point for nutrient exchange.

• C. Amniotic sac – Contains amniotic fluid for protection, not involved in nutrient transfer.

• D. Placenta – ✅ The organ attached to the uterine wall; exchange of nutrients, oxygen, and wastes occurs here. The umbilical cord links foetus to placenta.

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 8:

The placenta allows the transfer of substances such as oxygen, glucose, and mineral ions (e.g., calcium) from mother to baby.

However, whole proteins do not normally cross the placenta. Instead, amino acids are transferred, and the baby synthesizes its own proteins. (Note: Some antibodies — which are proteins — do cross, but those are immunoglobulins, not general dietary proteins, and the question likely refers to general nutrient proteins.)

In standard exam answers for “Which substance does NOT pass from mother to baby?” – Protein (intact) is the correct choice.

✅ Answer: C. Protein

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 9:

The structure X is the placenta. Waste products from the baby’s metabolism diffuse across the placenta into the mother’s bloodstream for excretion by the mother.

• Carbon dioxide – Passes from baby to mother (baby’s respiratory waste).

• Urea – Passes from baby to mother (nitrogenous waste from protein breakdown).

Urine and faeces are not directly passed across the placenta — the placenta handles dissolved wastes, but the baby does not urinate or defecate into the mother’s circulation (urine is released into amniotic fluid, and faeces are stored in the baby’s intestines until birth).

✅ Answer: A. carbon dioxide and urea

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 10:

The fluid Y surrounding the foetus is the amniotic fluid (inside the amniotic sac).

Its main functions include:

• Cushioning the foetus from mechanical shocks or knocks.

• Allowing movement and preventing compression of the umbilical cord.

• Maintaining a stable temperature.

It does not provide nutrients (that’s the placenta), does not provide oxygen (that’s via mother’s blood through placenta), and does not store faeces (meconium is stored in baby’s intestines, not in amniotic fluid normally).

✅ Answer: B. Protects the baby from knocks

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.