Internal and External Stimuli

Which word best describes the response the seedlings are showing?

• homeostasis

• stimulus

• hibernation

• phototropism

Tags

NGSS.MS-LS1-5

Organisms can change in order to adapt to their conditions. What might a plant growing in a dark corner of an otherwise sunny room do to adapt to its conditions, and what is this response called?

• The plant will die; this is called death.

• The plant will stop all life processes; this is called dormancy.

• The plant will bend and grow toward the light; this is called phototropism.

• The plant will slow down all life processes; this is called hibernation.

Tags

NGSS.MS-LS1-5

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.

An example of an internal stimulus is 

• thirst

• temperature

• light.

• noise

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

• To transport oxygen and nutrients

• To break down food and absorb nutrients

• To detect changes in the environment and coordinate appropriate responses

• To regulate body temperature

Tags

DOK Level 2: Skill/Concept

Which of these is an example of a plant responding to an internal stimulus?

• a leaf wilting because of lack of water

• the stem of a sunflower bending toward light

• a leaf closing when a bee brushes against it

• the roots of a tree growing downward, in the direction of gravity

What are the two types of stimuli?

• External and internal stimuli

• External and intermediate stimuli

• Internal and extraterrestrial stimuli

Tags

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

While sitting in a room, a person notices that the temperature has become uncomfortably warm. The body will respond by -

• shivering.

• sweating.

• twitching.

• vomiting.

Steven sets a brand new plant near the window. After several weeks Steven realizes the flower is starting to tilt towards the sunlight. What would be considered the stimuli in this scenario?

• Water

• The dirt in the flower pot

• The sunlight

• The window

Tags

NGSS.MS-LS1-8