Which of the following statements regarding pituitary hormones is FALSE?

Correct Answer: B

Rationale: The correct answer is B because antidiuretic hormone (ADH) actually causes urine volume to decrease as blood volume decreases, not increase. ADH acts on the kidneys to reabsorb water, leading to concentrated urine and conservation of body fluids. Rationale summary: A: True, hyposecretion of FSH or LH can lead to sterility in both males and females. C: False, oxytocin is also released during sexual activity, breastfeeding, social bonding, and stress responses, not just during childbirth and nursing. D: True, luteinizing hormone triggers ovulation and stimulates the production of progesterone and some estrogens.

Correct Answer: A

Rationale: The correct answer is A: The mouth. Starch digestion begins in the mouth due to the enzyme amylase present in saliva. Amylase breaks down starch into maltose. This process initiates digestion before food reaches the stomach or small intestine. The other choices are incorrect because oesophagus primarily serves as a passage for food, the small intestine is where most digestion and nutrient absorption occur, and the stomach's main role is to break down proteins with the enzyme pepsin, not starch.

Correct Answer: C

Rationale: The correct answer is C: Fats. Fats take the longest to digest due to their complex structure, requiring more time and effort for the stomach to break them down. This slow digestion process leads to fats staying in the stomach longer compared to carbohydrates and proteins. Carbohydrates are typically broken down relatively quickly, while proteins take longer than carbohydrates but are still processed more efficiently than fats. Therefore, fats remain in the stomach longest among the given options.

Correct Answer: C

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Correct Answer: D

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.