Internal/External Stimuli

Stimulus...

• A change that prompts an action-the cause
• The ability to maintain a stable internal environment (type of equilibrium or balance)
• How an organism reacts to a change and results in a change in behavior- the effect
• Constant and balanced environment

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

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

Which plant would be stiff and rigid?

• The plant with the full vacuole in the cell

• The plant with the empty vacuole in the cell

• All plants the water in the vacuole does not matter

Tags

NGSS.MS-LS1-5

NGSS.MS-LS1-2

Plants following the sun exhibit (show)

• Phototropism

• Geotropism

• Hydrotropism

• Thigmotropism

The plant is following the light.

• Phototropism

• Thigmotropism

• Hydrotropism

• Geotropism

What term refers to a plant growing or moving away from a stimulus?

• Touch

• Dormancy

• Tropism

• Development

Many birds migrate long distances when the seasons change. Which of the following is an environmental stimulus that would signal to the birds the changing seasons?

• Changes in the length of daylight.

• Increase in the population of edible plants.

• Decreased number of offspring per hatching event.

• Increase in annual precipitation levels.

Which of the following is a response to smelling food?

• Excessive sweating

• Rapid blinking

• Increased hunger

• Sensitivity to sound

Tags

NGSS.MS-LS1-8

Pain is a stimulus in animals that leads to responses which help the animal to -

• find food in the habitat.

• recuperate after exercise.

• avoid harmful situations.

• fight serious infections.

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

• shivering.

• sweating.

• twitching.

• vomiting.