What Did I Learn?

The following questions will help you review concepts presented in this module.

  1. Hydrolysis of the neurotransmitter acetycholine is facilitated by the enzyme acetylcholinesterase.  For hydrolysis of acetylcholine to occur, which of the following molecules is required?
    1. Choline
    2. Water
    3. Acetic acid
    4. Nerve Gas
  2. Like acetylcholine, nerve gas also binds to the enzyme acetycholinesterase but it is bound with a different kind of bond that prevents the breakdown of acetylcholine by the enzyme.  What kind of bond is formed between nerve gas and acetylcholinesterase?
    1. Covalent and reversible
    2. Electrostatic and reversible
    3. An irreversible hydrogen bond
    4. Covalent and irreversible
  3. In this module, you learned that the neurotransmitter acetylcholine can produce a variety of effects on the body.  Acetylcholine produces all of the effects below except:
    1. Bronchial constriction (inhibited breathing)
    2. Lacrimation (tears)
    3. Salivation
    4. Constipation
  4. One of the reasons that nerve gas is so poisonous is its ability to get into the human body quickly in many ways: absorption through the skin, inhalation into the lungs, and entrance through the eyes.  Once in the body, the drug easily reaches the brain, diffusing readily through the brain’s protective membrane (the blood-brain barrier).  Which property of nerve gas allows for its rapid penetration into the brain?
    1. Its phosphorous group
    2. Its lipophilic (non-polar) nature
    3. The fact that it is odorless
  5. The peripheral nervous system includes neurons that connect the brain and spinal cord to muscles, organs and skin to send sensory and motor information.  Based on your knowledge of the nervous system, which branch of the peripheral nervous system is responsible for controlling voluntary movement?
    1. The parasympathetic nervous system
    2. The autonomic nervous system
    3. The sympathetic nervous system
    4. The somatic nervous system
  6. Nerve gases are extremely toxic; a small droplet can kill a person. They exist in both liquid and gaseous forms. Inside closed containers, the nerve gases are in liquid form.  However, they when exposed to air, they:
    1. Vaporize due to their very high vapor pressure
    2. Vaporize due to their very low vapor pressure
    3. Remain in the liquid state
    4. Vaporize due to their dense nature

Now, check your answers here.