The baroreceptor reflex causes blood pressure to drop when it rises dangerously high. Predict whether this is a positive or negative feedback loop. Explain your reasoning.

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

b. Homeostasis is the condition of having a dynamic equilibrium of the internal environment.

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

c. Positive feedback loops are triggered by a deviation from the set point of a regulated variable and are shut down when conditions return to the set point.

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

d. The effects of negative feedback loops are amplified to create an escalating response.

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

e. Cell-cell communication is required to coordinate the activities of the whole body.

A gradient exists:

a. when heat is concentrated in one area of the body.

b. when more of a substance is located in one place than in another.

c. when there is higher pressure in one place than in another.

d. All of the above are correct.

e. None of the above are correct.

Which example most clearly describes a system maintained by homeostasis?

Which example below describes a system that is NOT able to maintain homeostasis?