SUMMARY 207 



the skull and the vertebral column. There are also organs of 

 special sense ; touch, heat, cold, pressure, and pain organs being 

 found in the skin, olfactory cells in the nose, taste cells in the 

 mouth, while the ear and eye furnish examples of most complex 

 sense organs. 



Problem Questions 



1. What are some of the simplest provisions for receiving stimuli in plants 

 or animals ? 



2. Do plants have any sense organs? Explain. How do plants differ 

 from animals in their method of response ? 



3. How do simple animals respond to stimuli? 



4. What is the work of the central nervous system? of the autonomic 

 nervous system ? 



5. WTiat are the functions of the cerebrum? the cerebellum? the spinal 

 cord? 



6. What is a neuron? 



7. ^\Tiat is a reflex? Explain fully. 



8. How are habits formed? 



9. T\Tiat are sensations? T\Tiat are sense organs? 

 10. How do we taste ? hear ? see ? 



Problem and Project References 



Hunter, Laboratory Problems in Civic Biology. American Book Company. 

 Atwood, Civic and Economic Biology. P. Blakiston's Son and Company. 

 Davison, Human Body and Health. American Book Company. 

 Densmore, General Botany. Ginn and Company. 

 Gager, Fundamentals of Botany. P. Blakiston's Son and Company. 

 Hough and Sedgwick, The Human Mechanism. Ginn and Company. 

 Loeb, Forced Movements, Tropisms and Animal Conduct. J. B. Lippincott 



Company. 

 Martin, The Human Body, Advanced Course. Henry Holt and Company. 

 Starling, Human Physiology. Lea and Febiger. 



