BL 2025 Session 1 Quiz (SBA)

What is the function of homeostasis in the human body?

• To maintain a stable internal environment despite external or internal changes

• To amplify responses to external stimuli

• To increase body temperature during infections

• To regulate only the pH levels in the body

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

• Amplifying uterine contractions during childbirth

• Restoring balance in body temperature control

• Increasing the heart rate during exercise

• Enhancing immune response during infections

What is the typical core body temperature range for humans?

• 34.5–35.5°C

• 36.5–37.5°C

• 38.5–39.5°C

• 40.5–41.5°C

What role does the hypothalamus play in body temperature regulation?

• It acts as a sensor to detect external temperature changes

• It compares detected temperature to a set point and triggers responses

• It directly controls the sweat glands and muscles

• It amplifies responses to external stimuli

What is the physiological response when the body is exposed to cold temperatures?

• Sweating and vasodilation

• Shivering and vasoconstriction

• Piloerection and vasodilation

• Sweating and piloerection

What is the term used to describe a body temperature of 38°C or higher during infections?

• Hypothermia

• Hyperthermia

• Pyrexia

• Vasodilation

• Fever

What is the normal safe range for blood pH in the human body?

• 6.8–7.2

• 7.35–7.45

• 7.5–8.0

• 6.5–7.0

What is a potential cause of respiratory alkalosis?

• Inability to breathe out enough CO₂

• Breathing out too much CO₂

• Build-up of acidic metabolites

• Loss of bicarbonate ions

What percentage of body weight is made up of water in a 'healthy 70kg male'?

• 50%

• 60%

• 70%

• 40%

Which of the following is a symptom of alkalosis affecting the peripheral nervous system?

• Nausea

• Hand tremor

• Shortness of breath

• Seizures