4.1 Closure Activity

Which of the following best describes the role of feedback mechanisms in maintaining homeostasis in the human body?

• They amplify changes in the internal environment.

• They detect changes and initiate responses to restore balance.

• They prevent any changes from occurring in the internal environment.

• They only function during periods of stress.

Tags

NGSS.HS-LS1-3

In an experiment to study feedback mechanisms, a student measures the blood glucose levels of a person after they consume a sugary drink. Which of the following would be an appropriate next step to investigate how the body maintains homeostasis?

• Measure the person's heart rate.

• Measure the insulin levels in the blood.

• Measure the person's body temperature.

• Measure the amount of oxygen in the blood.

Tags

NGSS.HS-LS1-3

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

• Blood clotting process.

• Childbirth contractions.

• Regulation of blood sugar levels.

• Fever response to infection.

Tags

NGSS.HS-LS1-3

A student is planning an investigation to demonstrate feedback mechanisms in plants. Which of the following would be a suitable focus for their investigation?

• The process of photosynthesis.

• The opening and closing of stomata in response to water availability.

• The growth of roots towards gravity.

• The production of flowers in response to daylight.

Tags

NGSS.HS-LS1-3

During an investigation, a student observes that when the body temperature rises, sweat production increases. What does this observation suggest about the role of sweating in homeostasis?

• Sweating is a positive feedback mechanism.

• Sweating helps to increase body temperature.

• Sweating is a negative feedback mechanism.

• Sweating has no effect on body temperature.

Tags

NGSS.HS-LS1-3

Which of the following scenarios best illustrates a feedback mechanism that maintains homeostasis in an ecosystem?

• A predator population increases, leading to a decrease in prey population.

• A plant population increases, leading to more food for herbivores.

• A decrease in prey population leads to a decrease in predator population, allowing prey population to recover.

• A drought causes a decrease in plant population.

Tags

NGSS.HS-LS1-3

In a feedback loop, what is the role of the effector?

• To detect changes in the environment.

• To process information and determine the response.

• To carry out the response to restore balance.

• To amplify the initial stimulus.

Tags

NGSS.HS-LS1-3

A student is conducting an experiment to understand feedback mechanisms in the human body. Which of the following would be a valid hypothesis for their experiment?

• Increasing external temperature will decrease the rate of sweating.

• Decreasing blood glucose levels will increase insulin production.

• Increasing heart rate will decrease blood pressure.

• Decreasing oxygen levels will increase carbon dioxide production.

Tags

NGSS.HS-LS1-3

Which of the following best explains why feedback mechanisms are essential for homeostasis?

• They allow organisms to adapt to new environments.

• They prevent any changes in the internal environment.

• They help organisms respond to external stimuli.

• They maintain stability by counteracting changes.

Tags

NGSS.HS-LS1-3

In a feedback mechanism, what is the role of the receptor?

• To carry out the response to a stimulus.

• To detect changes in the environment.

• To process information and determine the response.

• To amplify the initial stimulus.

Tags

NGSS.HS-LS1-3