Homeostasis and Feedback Mechanisms — MCQs

All are examples of negative feedback except

Which of the following structures is the primary regulator of circadian rhythms in the body?

Hormonal secretions are tightly controlled by the time of day due to an inbuilt biological clock in human body. This rhythmic secretion is controlled by:

What is the freezing point of normal human plasma?

Feed forward mechanism is seen in:

Which of the following is correct about the feedback hormone marked as $X$ ?

Which causes raised angiotensin in blood?

Blood pressure changes in radial artery were measured. Which of the following is the reason for initial rise in BP while performing Valsalva maneuver?

Which of the following hormones does not mediate its action through cAMP?

A 62-year-old woman eats a high carbohydrate meal. Her plasma glucose concentration rises, and this results in increased insulin secretion from the pancreatic islet cells. The insulin response is an example of