Which would be considered an internal stimulus?

You were playing soccer with your friends over the weekend. One of your friends decided to side-check you which caused you to fall and hurt your ankle. Your ankle is now swollen, bruised, and painful. 

Is this an internal or external stimulus?

You were playing fortnite with your friends last night when out of nowhere a huge thunderstorm started. This storm caused the power to go out which fried your computer. This left you feeling angry as you just bought a new headset.

Is this an internal or external stimulus?

For dinner, you ordered a chicken sandwich from a local restaurant. You were so excited you barely looked at the sandwich before you took a bite. While chewing you noticed the middle of the chicken was slightly pink. You were hungry so you ate the chicken sandwich anyway and began to vomit. 

Is this an internal or external stimulus?

You've been studying hard for an upcoming exam. When you start the exam the next day your head begins to hurt, your vision blurs, and you begin to vomit. All the stress from the exam caused you to become ill. 

Is this an internal or external stimulus?

Place the following scenarios into the correct category. 

Which of the following best describes turgor pressure?

Only multicellular organisms need to maintain homeostasis.

A wilted plant is said to have....

How does the force supplied by the water in the plant affect the plant?