Pre-Class Exams Physiology

Pre-Class Quiz 1: Nervous System & Neuron

1. A new drug interferes with the function of the dendrites of a neuron. What will happen to this neuron? The neuron cannot be stimulated to send a signal along its axon.

3. The sheath of Schwann is also called the neurilemma.

4. A nerve impulse does not vary in intensity with regard to the strength of the stimulus. This is known as what principle? All or nothing

5. Compounds that alter the rate of neurotransmitter release by the presynaptic neuron or change the postsynaptic cell's response to neurotransmitters are called neuromodulators

Pre-Class Quiz 2: Nervous System & Neuron

1. An impulse from one nerve cell is communicated to another nerve cell via the synapse

2. Which of the following is not true of graded potentials? They increase in amplitude as they move away from the stimulus point

3. You and your lab partner have prepared a frog nerve for gathering data on action potentials. You connect an electronic stimulator to the nerve and ask your partner to gradually increase the voltage until you see an action potential. Your partner says that the voltage knob is stuck, that is, it will not increase the voltage. Is there another way to trigger action potentials using this stimulator? If so, what do you tell your partner to do? Ask your partner to increase the frequency of stimulation, to allow a greater amount of neurotransmitter to be released

4. Which of the following is not a function of the nervous system? direct long-term functions like growth

5. The somatic nervous system controls skeletal muscles