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P&A - Reg. & Resp.

Plants and Animals Regulation and Response Vocab

QuestionAnswer
What is the largest organ in your body? Skin
What system provides the first line of defense against infection? Integumentary
What is a tropism? A plant's response to a stimulus.
What is a stimulus? Something that evokes a specific reaction.
What is your endocrine system? A collection of glands that produce hormones.
What is a hormone? A chemical signal created in one area of the body that evokes a reaction in another area of the body.
What do enzymes such as the ones found in your saliva do? Accelerates chemical reactions.
What is thigmotropism? Plant's growing or bending in response to touch.
What is phototropism? Plant's growing or bending towards light.
What is geotropism? The response of a plant to gravity in which the roots grow towards the center of earth and the shoots grow towards the sky.
What are feedback mechanisms? Process that uses conditions of one component to regulate the function of another.
What is hydrotropism? Plant's root growth towards water.
What type of signals are transmitted through the nervous system? Electrical signals.
Created by: kpartin