Biomed 100 Practice Quiz
Chapter 9, Fall 2007

---

Quizzes | Home

---

Multiple Choice - One Correct Choice Per Question

---

Roll mouse over choices to find best answer (it will "light up").
Please do not click on any of the choices.
If you accidentally click, use your Backspace key or Back button to get back here.

---

1. The peripheral nervous system
   1. consists of the spinal cord
   2. consists of cranial nerves and spinal nerves
   3. connects the central nervous system to various body parts
   4. A. and C.
   5. B. and C.
   
   
2. If an action potential is initiated in an axon
   1. the distance it travels depends on the strength of the stimulus
   2. it is conducted as an "all-or-none" event
   
   
3. Receptors transmit information directly to _?_.
   1. the central nervous system
   2. sensory neurons
   3. motor neurons
   4. interneurons
   
   
4. Most neurons have many _?_ since these structures serve as "receptive" surfaces.
   1. axons
   2. dendrites
   3. cell bodies
   4. all of the above
   
   
5. Which statement best describes the ion distribution in and around a neuron?
   1. There is low concentration of sodium ions inside the neuron and a high concentration of sodium ions outside the neuron.
   2. There is high concentration of sodium ions inside the neuron and a low concentration of sodium ions outside the neuron.
   3. There is high concentration of sodium ions both inside and outside the neuron.
   4. There is low concentration of sodium ions both inside and outside the neuron.
   
   
6. Normally, the _?_ of an axon is negative compared to the _?_.
   1. axon / cell body
   2. inside / outside
   3. proximal end (close to CNS) / distal end (far from CNS)
   
   
7. Sodium ions may pass through _?_ in the membrane of an axon.
   1. white matter
   2. phospholipids
   3. channels ("gates")
   4. intercalated discs
   
   
8. The _?_ has two large hemispheres that are interconnected by the corpus callosum.
   1. cerebrum
   2. cerebellum
   3. brainstem
   4. diencephalon
   
   
9. The hypothalamus is not involved in
   1. hunger and thirst
   2. detailed sensory processing
   3. regulation of body temperature
   4. regulation of sleep / wake cycles
   
   
10. The cerebral cortex
    1. is a thin layer of gray matter on the surface of each cerebral hemisphere
    2. contains sensory, motor, and association areas
    3. is the site of intelligence, consciousness, complex thought, etc.
    4. all of the above
    5. none of the above
    
    
11. The frontal lobe of the left cerebral hemisphere contains
    1. the motor areas that control voluntary muscles on the left side of the body
    2. the motor areas that control voluntary muscles on the right side of the body
    3. the motor areas that control voluntary muscles needed for speech
    4. B. and C.
    
    
12. True or false? Sensory input (such as input from the ears) is not processed until it arrives in the conscious part of the brain.
    1. True.
    2. False.
    
    
13. The "vital centers" necessary for breathing and regulation of blood pressure are located in the
    1. arbor vitae of the cerebellum
    2. thalamus of the diencephalon
    3. hypothalamus of the diencephalon
    4. medulla oblongata of the brainstem
    
    
14. Damage to the cerebellum would cause a person to be
    1. deaf
    2. blind
    3. paralyzed from the shoulders down
    4. clumsy, uncoordinated, and "off balance"