Homeostasis and Responses in Organisms

What is homeostasis?

• The ability of an organism to respond to external stimuli

• The tendency of an organism to maintain a balanced state

• The growth of roots in response to gravity

• The process of photosynthesis in plants

What is the purpose of shivering when the body becomes too cold?

• To warm up the body

• To maintain internal balance

• To produce warmth and heat the body's core

• To prevent dehydration

What is the purpose of sweating when the body is too hot?

• To prevent dehydration

• To cool down the body

• To maintain internal balance

• To produce warmth and heat the body's core

Which of the following is an example of a plant response to touch (thigmotropism)?

• Plants growing towards a light source

• Roots growing downward in response to gravity

• Plants changing their growth to bend around an object

• Plants wilting in response to lack of water

What is the purpose of the fight or flight response in animals?

• To protect the animal and ensure survival

• To produce warmth and heat the body's core

• To maintain internal balance

• To cool down the body

What triggers circadian rhythms in animals?

• Changes in daylight

• Changes in temperature

• Sensing danger

• Lack of water and food

How do plants respond to changes in daylight (phototropism)?

• By producing hormones to expand their root system

• By wilting in response to lack of water

• By changing their growth to bend around an object

• By growing towards a light source

What is the purpose of the immune response in the body?

• To cool down the body

• To maintain internal balance

• To produce warmth and heat the body's core

• To fight and destroy dangerous cells

Which of the following is an example of an animal response to danger?

• Roots growing downward in response to gravity

• Animals running away or becoming aggressive

• Plants growing towards a light source

• Plants changing their growth to bend around an object

What is the purpose of blinking the eyes in response to sunlight?

• To cool down the body

• To fight and destroy dangerous cells

• To protect the eyes from damage

• To maintain internal balance