1. Homeostasis begins in the ________________________________.
 
2. _____________________________ is the movement of water through the cell membrane.
 
3. Water always moves from an area of _______________ concentration to an area of _____________ concentration.
 
4. The __________________________ nervous system is composed of the brain and spinal cord.
 
5. The __________________________ nervous system is the part of the PNS that controls voluntary movement of the skeletal muscles.
 
6. The __________________________ nervous system is the part of the PNS that controls involuntary actions of the body.
 
7. Short, branching projections from a neuron cell body are called _______________________.
 
8. A synapse is a ________________________________________________________.
 
9. A neuron is in its resting state when it is _______________________________________.
 
10. During depolarization, _____________________ ions move into the cell.
 
11. __________________________________ are designed to accelerate or enhance the output created by a stimulus.
 
12. The speed of a nerve impulse depends mainly on the ____________________ of the neuron.
 
13. The brain uses _______________% of your body's oxygen.
 
14. The ____________________ lobe of the cerebrum is responsible for reasoning and emotions.
 
15. The ____________________ lobe of the cerebrum is responsible for vision.
 
16. The ___________________________ is responsible for muscle coordination and balance.
 
17. Insects have a _____________________ eye.
 
18. The plant hormone ______________________ is responsible for the ripening of fruit.
 
19. __________________________________ is a tropism that allows vines to climb.
 
20. ______________________ movements in plants produce rapid movements.