01 _____ helps the eye adjust the focal length of the lens.

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02 Which part allows light to enter the human eye?

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03 Which statement is true?

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04 Which of the following is not a voluntary action?

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05 _____ tissue contains neurons that receive and transmit impulses.

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06 In which body part are the cornea and retina found?

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07 Which statement about the cerebellum is not true?

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08 An ECG senses electrical activity generated by the _____.

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09 Which of these is a nerve cell?

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10 On which principle does the human eye work?

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