What is homeostasis in mammals primarily responsible for?
3.6.4.1 Principles of homeostasis and negative feedback

Quiz
•
Biology
•
12th Grade
•
Easy

Ross Kearns
Used 1+ times
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15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Maintaining external environmental conditions
Maintaining the internal environment within restricted limits
Increasing metabolic rate
Enhancing physical strength
Answer explanation
Homeostasis in mammals is primarily responsible for maintaining the internal environment within restricted limits, ensuring stable conditions for bodily functions despite external changes.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is maintaining a stable core temperature important for enzyme activity?
It prevents enzymes from becoming too active
It ensures enzymes do not denature
It increases enzyme production
It decreases enzyme efficiency
Answer explanation
Maintaining a stable core temperature is crucial because it ensures enzymes do not denature. High temperatures can disrupt the enzyme's structure, leading to loss of function, while optimal temperatures promote proper activity.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does a stable blood pH affect enzyme activity?
It allows enzymes to function optimally
It causes enzymes to become inactive
It reduces enzyme concentration
It increases enzyme degradation
Answer explanation
A stable blood pH is crucial for enzyme activity, as it allows enzymes to maintain their optimal shape and function. Deviations in pH can lead to reduced activity or inactivation, making the correct choice "It allows enzymes to function optimally."
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the significance of maintaining a stable blood glucose concentration?
It prevents dehydration
It ensures a constant supply of respiratory substrate
It increases blood pressure
It decreases metabolic rate
Answer explanation
Maintaining stable blood glucose levels is crucial as it ensures a constant supply of respiratory substrate, which is essential for energy production in cells. This prevents energy deficits that can impair bodily functions.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does blood glucose concentration affect the water potential of blood?
High glucose concentration increases water potential
Low glucose concentration decreases water potential
High glucose concentration decreases water potential
Glucose concentration has no effect on water potential
Answer explanation
High glucose concentration decreases water potential because glucose is a solute that increases osmotic pressure, leading to a lower water potential in the blood.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What role does negative feedback play in homeostasis?
It amplifies changes in the system
It restores systems to their original level
It disrupts homeostatic balance
It prevents any changes in the system
Answer explanation
Negative feedback is crucial in homeostasis as it helps restore systems to their original level after a change occurs, maintaining balance and stability within the body.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is it beneficial for organisms to have separate mechanisms for negative feedback?
It allows for faster responses
It provides a greater degree of control
It reduces energy consumption
It simplifies the regulatory process
Answer explanation
Having separate mechanisms for negative feedback provides a greater degree of control, allowing organisms to fine-tune their responses to various stimuli and maintain homeostasis more effectively.
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