Stimuli/Body Systems

A fox spots a rabbit in a field. The fox begins to chase the rabbit, and the rabbit runs away. Which best describes the rabbit's behavior in response to the stimulus of being chased?

• It is a tropism.

• It is a fight-or-flight response.

• It is a response caused by hunger.

• It is a response caused by an internal stimulus.

Which word best describes the response the seedlings are showing?

• homeostasis

• stimulus

• hibernation

• phototropism

What is homeostasis?

• changes in a species over time

• the response of an organism to a stimulus

• the ability of an organism to reproduce

• the balance in an organism's internal environment

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NGSS.MS-LS1-3

An example of an internal stimulus is 

• thirst

• temperature

• light.

• noise

Dina is relaxing by walking her dog on a warm, sunny afternoon. Dina feels sweaty, and she sees that her dog is panting. Which is the most likely stimulus causing these responses in both Dina and her dog?

• hunger

• high temperature

• thirst

• light from the sun

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NGSS.MS-LS1-8

Define response.

• Change in an organism’s environment that causes it to react.

• How the organism reacts to the stimulus.

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NGSS.MS-LS1-8

A stimulus is _________

• process in which organisms grow larger.

• a change in the environment that causes a reaction

• a reaction to a change in surroundings

• the center of a cell

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NGSS.MS-LS1-8

Which of the following is an example of an external Stimuli?

• Becoming dehydrated and then taking a drink of water
• Getting a headache and then taking Excedrin
• Having hunger pains and then eating a sandwich
• Smelling Pizza and then eating a piece

Tags

NGSS.MS-LS1-8

A crocodile quietly stalks its prey, a wildebeest, drinking at a water hole. The wildebeest suddenly sees the crocodile approaching. The wildebeest’s body responds by -

• shedding thick fur

• clinking rapidly

• increasing the heart rate

• requiring more food

A student places a plant in a dark room next to growth lamp, while providing sufficient water and nutrients to ensure the plant's growth and survival. The plant will likely respond-

• bending towards the lamp

• wilting and eventually dying

• shedding all of its leave

• increasing its rate of photosynthesis

Tags

NGSS.MS-LS1-5

NGSS.MS-LS1-6