Understanding Homeostasis and Feedback Mechanisms

What is homeostasis?

• The process of amplifying physiological changes

• The maintenance of a constant internal environment within physiological tolerance limits

• The tendency to disrupt internal equilibrium

• The process of increasing blood glucose levels

Which of the following is an example of a negative feedback mechanism?

• Blood clotting

• Childbirth contractions

• Regulation of blood glucose levels

• Amplification of a stimulus

What hormone is responsible for lowering blood glucose levels?

• Glucagon

• Adrenaline

• Insulin

• Thyroxin

Which type of diabetes is characterised by the destruction of beta cells?

• Type 1 Diabetes

• Type 2 Diabetes

• Gestational Diabetes

• Pre-diabetes

What is the primary function of melatonin in circadian rhythms?

• To increase heart rate

• To regulate sleep patterns

• To control blood glucose levels

• To stimulate digestion

Which of the following is a cooling mechanism in thermoregulation?

• Vasoconstriction

• Shivering

• Piloerection

• Sweating

What triggers the release of adrenaline from the adrenal glands?

• Low blood glucose levels

• The amygdala sending stress signals to the hypothalamus

• High melatonin levels

• Low body temperature

Which receptors detect changes in blood pressure?

• Chemoreceptors

• Thermoreceptors

• Baroreceptors

• Photoreceptors

What is the role of the enteric nervous system in digestion?

• To control voluntary swallowing

• To coordinate the sequential contraction of smooth muscles for peristalsis

• To regulate blood glucose levels

• To increase heart rate during digestion

Which hormone is involved in increasing metabolic activity to produce heat?

• Insulin

• Glucagon

• Thyroxin

• Melatonin