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이 집합의 용어 (9)

  • What are the levels of structural organization from simplest to most complex?

    Chemical → Cellular → Tissue → Organ → Organ System → Organism

  • What does each level mean?

    Chemical = atoms/molecules → Cellular = cells → Tissue = similar cells working together → Organ = tissues working together → Organ System = organs working together → Organism = complete living individual.

  • What is the basic structural and functional unit of the body?

    Cell.

  • What is homeostasis?

    The body's ability to maintain a relatively stable internal environment.

  • What are the 3 main parts of a feedback mechanism?

    Receptor → Control center → Effector

  • What is the difference between negative and positive feedback?

    Negative feedback reverses a change to return the body toward normal. Positive feedback strengthens the change until a specific event is completed.

  • What is a cation?

    A positively charged ion.

  • What is an anion?

    A negatively charged ion.

  • How do cations and anions form?

    Cations lose electrons → positive.Anions gain electrons → negative.