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lNote: This question is answered in the chapter 9 Study Guide found on the Online Learning Center at

Human Physiology

17. explain the trichromatic theory of color vision.

Explain how taste cells are stimulated by foods that are salty, sour, sweet, and bitter.

describe the structure and function of the olfactory receptors and explain how odor discrimination might be accomplished.

describe the structure of the cochlea and explain how movements of the stapes against the oval window result in vibrations of the basilar membrane.

explain how mechanical energy is converted into nerve impulses by the organ of Corti and how pitch perception is accomplished.

describe the structure of the eye and explain how images are brought to a focus on the retina.

explain how visual accommodation is achieved and describe the defects associated with myopia, hyperopia, and astigmatism.

describe the architecture of the retina and trace the pathways of light and nerve activity through the retina.

describe the function of rhodopsin in the rods and explain how dark adaptation is achieved.

explain how light affects the electrical activity of rods and their synaptic input to bipolar cells.

17. explain the trichromatic theory of color vision.

compare rods and cones with respect to their locations, synaptic connections, and functions.

describe the neural pathways from the retina, explaining the differences in pathways from different regions of the visual field.






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Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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