7.13A External Stimulus DOL

1. Which of the following would be an example of an external stimulus-response?

• A. Immune system attacked; experience fever
• B. Blood sugar levels rise; body produces insulin
• C. Stomach growls; organism eats
• D. Cold weather arrives; birds migrate

Tags

7.13A

2. A crocodile quietly stalks its prey, a wildebeest, drinking at a water hole. The wildebeest suddenly sees the crocodile approaching. As the wildebeest begins to exhibit the physical signs of the fight or flight response, the wildebeest's body will most likely--

• A. shed thick fur.
• B. increase it's heartrate.
• C. blink rapidly.
• D. require more food.

Tags

7.13A

3. What would be an example of positive hydrotropism?

• A. Shoots growing toward the sunlight
• B. Roots growing away from the sunlight
• C. Shoots growing away from water
• D. Roots growing toward the water

Tags

7.13A

4. If you touch a plant called sensitive mimosa, its leaves wilt suddenly. What kind of response is this?

• A. Thigmotropism and also causes a loss of turgor pressure
• B. Thigmotropism and also causes an increase of turgor pressure
• C. Phototropism and also causes a loss of turgor pressure
• D. Phototropism and also causes an increase of turgor pressure

Tags

7.13A

5. When dogs become overheated they breathe with short quick breaths called panting. Which statement below explains the process of panting?

• A. Panting is a stimulus that causes dogs to overheat
• B. Panting is a flight or fight response that causes dogs to overheat
• C. Panting is a response to the external stimuli of increased temperatures
• D. Panting is a response to the external stimuli of decreased temperatures

Tags

7.13A