Homeostasis and Feedback Mechanisms

Which of the following is a good definition of homeostasis?

• Homeostasis means that our body monitos the value of several parameters and prevents them from ever changing.

• Homeostasis means that our body doesn't regulate the value of different body parameters.

• Homeostasis means that our body maintains a relatively constant internal environment that often incorporates a form of feedback regulation.

• Homeostasis means that we stand still all the time.

What is the point of a feedback loop?

• To provide the body with more energy

• To provide the body with more food

• To make sure the conditions in the body are always changing

• To make sure the conditions in the body remain stable

What type of feedback loop is shown?

• negative

• neutral

• positive

If the environment gets cold, we will often shiver in order to:

• keep body temperature the same as the external temperature
• decrease body temperature
• increase body temperature
• regulate blood pressure

Maintaining body temperature is an example of a:

• negative feedback loop
• positive feedback loop

detects change and sends a message to the control center

• receptor

• control center

• effector

• regulation

receives the message and coordinates a response

• control center

• effector

• glucagon

• homeostasis

reverses the direction of change

• positive feedback

• effector

• hypothalamus

• negative feedback

increases or speeds up original change

• negative feedback

• positive feedback

• endotherm

• ectotherm