JARVIS'S PRACTICAL PHYSIOLOGY. 423 



785. Relate a case recorded by Sir Astley Cooper. 



786. Is the brain subject to growth and decay 1 ? With what appara- 

 tus is it furnished? What part of the blood of the body does the brain 

 receive ? 



787. What effect has the action of the brain on its blood-vessels? 



788. When does the brain require rest? 



789. What is the natural rest of the brain? What kind of sleep 

 refreshes the brain most? 



CHAPTER VI. 



790. What is the proper season for mental labor ? For mental re- 

 pose? 



791. What do some students practise ? With what effect? When 

 has the brain naturally the greatest power for labor? 



792. What effect has proper exercise on the brain? What effect 

 has excessive exercise ? 



793. What relation exists between the brain and other organs? 



794. What between the brain and heart? 795. Between the brain 

 and lungs? 796. Between the brain and stomach? 797. Between 

 the brain and muscles? 



798. How does alcohol affect muscles? 799. Is this permanent? 



800. Illustrate. 



801. Why is the drunkard, when sober, exposed to accidents? 



CHAPTER VII. 



802. How does the mind communicate with the external world? 

 8U3. What fixes a limit to the action of the human mind? 



804. What reciprocal influences are exerted by the brain and the 

 mind ? 



805. Mention some specific influences. 



806. State the case of a child. 



807. What is the effect of indigestion and nausea? 



808. How does excessive eating affect mental action? How does 

 hunger ? 



809. How are the moral powers and affections influenced by the 

 stomach ? Illustrate. 



810. What effects are ascribed to cheerfulness ? What to sorrow and 

 care ? 



811. What feelings favor digestion? What feelings retard it? 



812. What connection has health with cheerfulness? 



CHAPTER VIII. 



813. What operations does the brain superintend ? How far is it 

 under our control ? How far are we responsible for its action ? 



814. When does the brain perform its offices well ? When not 

 well ? 



815. When can the brain superintend more than one operation at a 

 time ? When only one ? 



