Heart Rate and Feedback Quiz

What is the primary role of homeostasis in the human body?

• To ensure that the body's environment remains constant

• To increase the variability of internal conditions

• To decrease the body's response to external stimuli

• To ensure that the body's environment changes frequently

Which of the following is an example of a negative feedback loop in the human body?

• Blood clotting

• Childbirth contractions

• Regulation of blood glucose by insulin

• Release of oxytocin during breastfeeding

What happens to the heart rate when the body is under stress?

• It decreases

• It remains constant

• It increases

• It stops

Which of the following is a positive feedback loop example?

• Body temperature regulation

• Blood glucose regulation

• Blood clotting

• Sweating to reduce body temperature

How does the body maintain its temperature on a cold day?

• By sweating

• By decreasing the metabolic rate

• By shivering

• By increasing blood flow to the skin

What is the role of insulin in blood glucose control?

• To increase blood glucose levels

• To decrease blood glucose levels

• To maintain blood glucose levels constant, regardless of external factors

• To increase the permeability of cell membranes to glucose

Which of the following best describes homeostasis?

• The process by which organisms maintain a fluctuating internal environment

• The process by which organisms maintain a relatively stable internal environment

• The ability of an organism to change its internal environment frequently

• The inability of an organism to adapt to external changes

During vigorous exercise, how does the body respond to an increase in body temperature?

• By decreasing heart rate

• By increasing sweating

• By reducing blood flow to the skin

• By shivering

What triggers a positive feedback loop?

• A return to a set point

• A stimulus that changes a set point that is corrected

• A stimulus that triggers a process that enhances said stimulus

• A constant internal environment

How does the body respond to high blood glucose levels?

• By releasing glucagon

• By releasing insulin

• By increasing glucose absorption in the intestines

• By decreasing the permeability of cell membranes to glucose