Organisms and Stimuli

What is a stimulus?

• A stimulus is a type of medication.

• A stimulus is a form of communication.

• Any object or event that elicits a response or reaction from an organism.

• A stimulus is a type of food.

Do all living organisms respond to stimuli?

• Only plants respond to stimuli

• Yes

• Only some organisms respond to stimuli

• No

Give an example of a stimulus and the response it elicits in a plant.

• Wind

• Sunlight

• Water

• Gravity

How do animals respond to stimuli?

• Animals respond to stimuli through their sensory organs and nervous system.

• Animals respond to stimuli through their digestive system.

• Animals do not respond to stimuli.

• Animals respond to stimuli through their muscular system.

What are the different types of stimuli that organisms can respond to?

• light, sound, touch, temperature, chemicals, gravity

• heat, pressure, taste, smell, sound, electricity

• color, texture, weight, taste, smell, sound

• sight, smell, taste, hearing, pressure, magnetism

Explain the concept of tropism in plants.

• Tropism is the process of plants reproducing through the release of spores.

• Tropism is the ability of plants to communicate with each other through chemical signals.

• Tropism is the growth or movement of a plant in response to a stimulus.

• Tropism is the process of plants converting sunlight into energy.

What is the purpose of a reflex action in animals?

• The purpose of a reflex action in animals is to provide a rapid and automatic response to a stimulus.

• The purpose of a reflex action in animals is to delay the response to a stimulus.

• The purpose of a reflex action in animals is to provide a voluntary response to a stimulus.

• The purpose of a reflex action in animals is to prevent any response to a stimulus.

How do single-celled organisms respond to stimuli?

• Phototaxis

• Thermotaxis

• Mechanotaxis

• Chemotaxis

What is the role of the nervous system in responding to stimuli?

• To receive and process sensory information, transmit signals to the brain, and coordinate the body's response.

• To control muscle movement

• To regulate body temperature

• To produce and release hormones

Can non-living things respond to stimuli? Why or why not?

• Yes, because non-living things can move and react to their environment.

• Yes, because non-living things can grow and reproduce.

• Yes, because non-living things can feel and experience emotions.

• No