Stimulus & Response

Most bacteria that cause sickness in humans grow best at 98.6F. Sometimes a fever is the body's response to the bacteria. What is the reason for developing a fever?

• To lower the temperature of the body to kill the bacteria

• The increase the temperature of the body to kill the bacteria

• To allow the bacteria to take over

• To make you feel miserable

Which of the following is NOT an example of a response to an internal stimulus?

• You put on a jacket in the evening when the air temperature drops

• You vomit when you have a stomach virus

• You go and visit the school nurse when you have a fever

• You get a snack when you get hungry

With exercise, or increased activity, the heart uses ___________________ force to move the blood through the circulatory system and around the body.

• less

• the same amount of

• no

• more

After you run 100m as fast as you can, you will be breathing hard and your heart will pump faster. What causes your breathing to return to its regular pattern?

• Stimuli

• Homeostasis

• Turgor pressure

• Fight or flight

Which of the following is an example of a response to an external stimulus?

• You jump when you hear a clap of thunder

• You take a nap when you feel tired

• You take medicine for a headache

• You get a drink of water when you are thirsty

Cause is to __________________________ as effect is to____________________

• Homeostasis : stimulus

• Reflex : response

• Response : fever

• Stimulus : response

The human body is complex, consisting of many types of cells. Each cell plays a specific role in maintaining the body’s balance. This internal balance is called___________

• Internal equilibrium

• Balance

• Homeostasis

• A good state

A squirrel runs up a tree when it sees a cat. This squirrel’s behavior is an example of -

• A stimulus

• Homeostasis

• A response

• None of the above

One side of a plant is exposed to sunlight and the other side of the plant does not receive sunlight. The stimulus is _____, the response is ______.

• Internal, bends towards the light

• Internal, bend away from the light

• External, bends towards the light

• External, bend away from the light

As the season turns from fall to winter, what is the most likely response that a wolf’s body has to the changing season?

• The wolf stores more fat to maintain body heat and provide nutrition when there may be less prey.

• The wolf produces less fur and sheds more fur to help the wolf move quickly to find shelter in the cold.

• The wolf produces more melanin causing the fur to be darker so that the pack can see other individuals easily.

• The wolf runs more and eats less food to maintain less body mass to warm throughout the winter.