Question

1. what is the primary function of homeostasis in the human body?

a. generating energy for physical activities
b. maintaining a stable internal environment
c. eliminating waste products from the body
d. producing hormones for growth and development

1. which of the following is the best analogy for negative feedback in maintaining homeostasis?

a. a thermostat maintaining a constant room temperature
b. a snowball rolling down a hill, growing larger
c. a fire alarm triggering a sprinkler system
d. a bicycle accelerating downhill

1. in a negative feedback loop, what role does the sensor play?

a. detecting changes in the internal environment
b. comparing current conditions to the set point
c. activating effectors to restore balance
d. causing a change to bring the condition back to normal

Explanation:

1. Homeostasis is defined as the body's process of keeping internal conditions stable despite external changes.
2. Negative feedback reverses deviations from a set point to maintain stability, like a thermostat adjusting to keep room temperature constant.
3. In negative feedback loops, sensors first detect shifts in the internal environment to initiate the regulatory process.

Answer:

1. B. Maintaining a stable internal environment
2. A. A thermostat maintaining a constant room temperature
3. A. Detecting changes in the internal environment