Some receptors diminish the extent of their depolarization despite sustained stimulus strength, a phenomenon called ____.
a. reduction
b. depolarizing
c. ionization
d. evolution
e. adaptation
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Question 2) Which statement about graded potentials is false?
a. They are decremental.
b. They travel only short distances.
c. They are self-propagating.
d. They may contribute to the development of an action potential.
e. They travel in both directions along the membrane.
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Question 3) Nociceptors are sensitive to ____.
a. sound
b. osmolarity
c. pain
d. light
e. scent
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Question 4) If a neuron were experimentally stimulated at both ends simultaneously, then
a. the action potentials would pass in the middle and travel to the opposite ends
b. the action potentials would meet in the middle and then be propagated back to their starting positions
c. the action potentials would stop as they met in the middle
d. the strongest action potential would override the weaker action potential
e. summation would occur when the action potentials met in the middle, resulting in a two larger action potentials traveling in opposite directions
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Question 5) Describe the three major uses of an electroencephalogram (EEG).
What will be an ideal response?
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Question 6) During the peak of the action potential, the membrane becomes most permeable to
a. sodium
b. potassium
c. calcium
d. chloride
e. protein
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Question 7) Explain the concept of working memory.
What will be an ideal response?
(
Question 8) Permeability of which ion is affected by a positive feedback mechanism once threshold is reached?
a. sodium
b. potassium
c. calcium
d. chloride
e. protein
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Question 9) List the nine functions of the hypothalamus.
What will be an ideal response?
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Question 10) Select the incorrect statement about the action potential.
a. It has an all-or-none characteristic
b. It has a refractory period
c. It is triggered by depolarization to threshold
d. It occurs along a plasma membrane
e. It speeds up transmission by summation
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