Bio 348 Exam 1 Questions with Correct Answers
Select the answer regarding the Neuron Doctrine that is false.
a) neurons are separate, individual cells
b) it was proposed by Santiago Ramon y Cajal
c) Neurons work together to create a response through synapses
d) all of these are correct
d
Abby is making a sandwich. She decided she wanted a BLT and must make bacon on a
skillet to accomplish this craving. While the bacon was sizzling, a little bit of grease
crackled and hit Abby. What kind of signal projected to the CNS?
a) afferent
b) efferent
a
What necessary aspect of the nervous system exists to mediate communication between
afferent and efferent neurons?
a) sensory neuron
b) motor neuron
c) interneurons
d) none of the above
c
An action potential is known as an "all-or-nothing response." What is the threshold for
membrane potential that will cause which voltage gated membranes to open?
a) -55 mV, potassium channels
, b) -55 mV, sodium channels
c) -70 mV, potassium channels
d) -70 mV, sodium channels
b
Communication within the neuron is ______, but communication between neurons is
_______ with the use of _________.
a) electrical, chemical, neurotransmitters
b) chemical, electrical, neurotransmitters
c) electrical, chemical, interneurons
d) chemical, electrical, interneurons
a
Ohm's law is an equation to measure membrane potential. What is "I" for in this
equation?
a) The difference in charges between membranes.
b) How the charge flows.
c) Resistance to the movement of charge.
d) none of the above
b
"The inside of a neuron has a negative voltage relative to the outside." ~Dr. C Which
statement is correct?
a) a neuron is polarized
b) a neuron is non polarized
c) the membrane potential means a cell has 70 mV less relative to the outside of the cell
d) a and c are both correct
Select the answer regarding the Neuron Doctrine that is false.
a) neurons are separate, individual cells
b) it was proposed by Santiago Ramon y Cajal
c) Neurons work together to create a response through synapses
d) all of these are correct
d
Abby is making a sandwich. She decided she wanted a BLT and must make bacon on a
skillet to accomplish this craving. While the bacon was sizzling, a little bit of grease
crackled and hit Abby. What kind of signal projected to the CNS?
a) afferent
b) efferent
a
What necessary aspect of the nervous system exists to mediate communication between
afferent and efferent neurons?
a) sensory neuron
b) motor neuron
c) interneurons
d) none of the above
c
An action potential is known as an "all-or-nothing response." What is the threshold for
membrane potential that will cause which voltage gated membranes to open?
a) -55 mV, potassium channels
, b) -55 mV, sodium channels
c) -70 mV, potassium channels
d) -70 mV, sodium channels
b
Communication within the neuron is ______, but communication between neurons is
_______ with the use of _________.
a) electrical, chemical, neurotransmitters
b) chemical, electrical, neurotransmitters
c) electrical, chemical, interneurons
d) chemical, electrical, interneurons
a
Ohm's law is an equation to measure membrane potential. What is "I" for in this
equation?
a) The difference in charges between membranes.
b) How the charge flows.
c) Resistance to the movement of charge.
d) none of the above
b
"The inside of a neuron has a negative voltage relative to the outside." ~Dr. C Which
statement is correct?
a) a neuron is polarized
b) a neuron is non polarized
c) the membrane potential means a cell has 70 mV less relative to the outside of the cell
d) a and c are both correct
