Quiz_PCS67-101_Lec 1_Homeostasis

Which of the following best describes homeostasis?

• Static condition

• Dynamic constancy

• Fixed equilibrium

• Passive response

Which is a component of a feedback system?

• Substrate

• Ion channel

• Sensor

• Modulator

What is the primary purpose of negative feedback?

• Amplify responses

• Stimulate hormone release

• Maintain stability

• Destroy pathogens

Which of the following represents a positive feedback mechanism?

• Sweating in hot environment

• Blood glucose regulation

• Clot formation after vascular injury

• Blood pressure regulation

The Na⁺/K⁺ ATPase pump is crucial in maintaining ...................

• Hormonal balance

• Membrane potential

• Plasma pH

• Osmotic pressure

Which of the following responses most directly counteracts an increase in body temperature?

• Breathing rate increases

• Water output in urine increases

• Release of sugar from the liver increases

• Sweat production increases

Which of the following responses most directly counteracts a decrease in blood glucose?

• Breathing rate increases

• Water output in urine increases

• Release of sugar from the liver increases

• Sweat production increases

Which of the following responses most directly counteracts an increase in water levels in body?

• Breathing rate increases

• Water output in urine increases

• Release of sugar from the liver increases

• Sweat production increases

Which of the following responses most directly counteracts an increase in CO2 levels in the blood?

• Breathing rate increases

• Water output in urine increases

• Release of sugar from the liver increases

• Sweat production increases

Positive feedback loops ........(1)........... a stimulus. These loops .........(2).......... .

• 1. 1. amplify

  2. 2. return a system to a steady state

• 1. 1. amplify

  2. 2. drive physiological processes to completion

• 1. 1. counteract

  2. 2. return a system to a steady state

• 1. 1. counteract

  2. 2. drive physiological processes to completion