Stimuli

Which action describes a response to internal stimuli?

• 
  Catching a ball at a baseball game

• Drinking when you are thirsty

• Running at the sight of a wild lion

• Writing a thank you note

Based on the context, stimulus refers to–

• outside reaction that monitor your bodily systems

• the temperature of the body

• food that gives your body energy

• A thing of even that causes a reaction

A houseplant is placed on a window sill that gets direct, bright sunlight every afternoon. The plant starts to grow toward the window. What kind of response is described by this situation?

• A negative response to a stimulus

• a learned behavior

• gravitropism

• phototropism

Tags

NGSS.MS-LS1-5

Which homeostasis mechanism is the plant version of an animal drinking when it gets thirsty?

• A plant's growth response toward light

• A plant's growth response to gravitation

• 
  A plant wilting when the soil dries out

• 
  A plant making sugar through photosynthesis

Tags

NGSS.MS-LS2-1

What can the reader conclude about homeostasis?

• 
  Only multicellular organisms maintain homeostasis.

• 
  Without receptors, an organism cannot maintain homeostasis.

• Learned behaviors are not important for an organism to maintain homeostasis.

• Plants only need to respond to internal stimuli to maintain homeostasis.

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-3

What is the best summary of this passage?

• Options

  • An external stimulus comes from outside the organism. Animals respond to stimuli through learned behaviors and instinct.

• Stimuli trigger responses in organisms that allow them to maintain constant internal conditions through homeostasis.

• 
  Homeostasis is a set of mechanisms that work to maintain stable internal conditions as external conditions change.

• 
  Phototropism is a plant's response to turn toward light. Gravitropism is a plant's response to grow upward against gravity.

Tags

NGSS.MS-LS1-8