Internal and External Stimuli

What type of tropism is response to touch? 

• Gravitropism

• Phototropism

• Thigmotropism

• Hydrotropism

Changes in an organism's environment that cause a response

• Tropism

• Hormone

• Stimuli

• Response

Tags

NGSS.MS-LS2-4

Which of the following is a stimulus that might result in vomiting?

• A cut in the skin

• Low energy

• Hot temperature

• Eating spoiled food

what type of tropism is occurring here?

• phototropism

• thigmotropism

• gravitropism

• tropictropism

Which of the following is an external stimulus?

• Bacterial infection

• Hunger

• Temperature of environment

• Thirst

A crocodile quietly stalks its prey, a wildebeest, drinking at a water hole. The wildebeest suddenly sees the crocodile approaching. The wildebeest’s body responds by -

• Shedding thick fur

• blinking rapidly

• increasing heart rate

• requiring more food

A student places a plant in a dark room next to a growth lamp, while providing sufficient water and nutrients to ensure the plant’s growth and survival. The plant will likely respond by -

• bending towards the lamp

• wilting and eventually dying

• shedding all of its leaves

• Increasing its rate of photosynthesis

Tags

NGSS.MS-LS1-5

NGSS.MS-LS1-6

NGSS.MS-LS2-1

When a plant wilts due to lack of water, it is responding to which of the following internal stimuli?

• decreased water pressure within the plants cells

• lack of nutrients carried by water in the plant

• decreased rate of photosynthesis in the stem

• increased storage f glucose in the leaves

Tags

NGSS.MS-LS1-2

When an animal is thirsty, it responds by -

• eating food

• drinking water

• blinking rapidly

• sweating excessively

Which of the following is an example of an internal stimulus in humans?

• A) Light entering the eyes

• B) Sound of a loud noise

• C) Feeling of hunger

• D) Temperature of the room