Cell Transport Quiz

What is homeostasis?

• The process by which an organism's internal environment is kept stable in response to changes in external conditions

• The need for an organism to consume food

• The ability of an organism to reproduce

• The process by which an organism responds to changes in its habitat

What does "dynamic equilibrium" in the context of homeostasis refer to?

• A state where internal conditions are constantly changing and never stable

• A state where internal conditions are completely unchanging

• A state where internal conditions fluctuate within a certain range

• A state where the organism is in a constant state of distress

What is a stimulus in the context of homeostasis?

• A response by the organism to maintain equilibrium

• A change in the environment that requires an adjustment by the organism

• A stable condition within the organism's internal environment

• A type of homeostatic control mechanism

What is a response in the context of homeostasis?

• A change in the environment that affects the organism

• The organism's adjustment to external temperature changes

• A change in the organism, as a result of a stimulus, to maintain homeostasis

• The process of consuming food to generate energy

What is the purpose of feedback mechanisms in organisms?

• To consume energy

• To help maintain homeostasis as they respond to stimuli

• To reproduce

• To increase entropy

Feedback mechanisms in organisms use the output of a system to signal what?

• A change in the environment

• A change in input so that a system response can be stabilized or amplified

• A malfunction within the system

• The need for energy consumption

Can feedback mechanisms be both positive and negative?

• Yes, they can be both positive and negative

• No, they can only be positive

• No, they can only be negative

• Feedback mechanisms do not have polarity

What does the output of a positive feedback loop do to the system's response?

• Reduces the response

• Has no effect on the response

• Intensifies the response

• Stops the response

Which of the following is an example of a positive feedback mechanism?

• Human child birth

• Fruit rotting

• Ice melting

• Leaves falling

During fruit ripening, what does the fruit release that affects its surroundings?

• Carbon dioxide

• Ethylene

• Oxygen

• Nitrogen