Internal and External Stimuli

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-LS1-2

The plant is following the light.

• Phototropism

• Thigmotropism

• Hydrotropism

• Geotropism

Tags

NGSS.MS-LS1-5

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.

Tags

NGSS.MS-ESS1-1

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.

Tags

NGSS.MS-LS1-8

Roots grow downward in the soil in response to-

• gravity
• sunlight
• water 
• wind

Tags

NGSS.3-PS2-1

Geotropism is a force that affects certain organisms.  Which of the following is an example of a plant responding to the external stimulus of gravity?

• A seedling growing towards a sunny window.
• Plant roots growing down into the soil.
• Flowers producing nectar to attract bees.
• A potted plant wilting when it dries out.

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-LS1-8

It is a very hot, sunny day so a dog sits in the shade.

• external stimulus

• internal stimulus

Tags

NGSS.MS-LS1-8

An animal is cold so it moves into the sun. What is the underline phrase?

• stimulus

• response

Tags

NGSS.MS-LS1-8