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PhysioEx Exercise 3 quiz with 100% Correct Answers

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PhysioEx Exercise 3 quiz with 100% Correct Answers What is the approximate concentration of K+ inside a typical cell? - Answer️️ -150mM What is the approximate concentration of Na+ inside a cell? - Answer️️ - 5mM What is the approximate concentration of Na+ outside a cell? - Answer️�...

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  • August 29, 2024
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  • 2024/2025
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SophiaBennett
©SOPHIABENNETT@2024-2025 Monday, August 26, 2024 6:09 AM

Thompson Rivers University (TRU)


PhysioEx Exercise 3 quiz with 100% Correct Answers

What is the approximate concentration of K+ inside a typical cell? -
Answer✔️✔️-150mM

What is the approximate concentration of Na+ inside a cell? - Answer✔️✔️-
5mM

What is the approximate concentration of Na+ outside a cell? - Answer✔️✔️-
150mM

What is the approximate concentration of K+ outside a typical cell? -
Answer✔️✔️-5mM

A negative membrane potential was recorded when the tip of the
microelectrode was - Answer✔️✔️-both inside the cell body and inside the
axon

Which of the following caused a change in membrane potential from -70 to
-40 in the cell body? - Answer✔️✔️-an increase in extracellular K+

Which of the following has the most negative voltage? - Answer✔️✔️-
between the inside of the axon and the outside of the axon with control K+
ECF

Assuming the resting potential of a sensory neuron is -70mV, which of the
following represents a depolarization? - Answer✔️✔️-change to -60mV


1

, ©SOPHIABENNETT@2024-2025 Monday, August 26, 2024 6:09 AM

Thompson Rivers University (TRU)


Which of the following is a sensory modality? - Answer✔️✔️-all of the above
(touch, smell, sight, & paint)

which of the following is a sensory stimulus? - Answer✔️✔️-all of the above
( pressure, chemical odorants & light)

Which of the following is true of the response of a sensory neuron to the
appropriate sensory stimulus? - Answer✔️✔️-it can be a receptor potential &
it is a graded potential AND it is a change in the resting membrane
potential

A very intense stimulus can sometimes stimulate sensory neurons that
have evolved for a different modality. Thus, with a blow to the eye, one
"sees stars". In this example, the photoreceptors in the eye are responding
to - Answer✔️✔️-intense pressure

Olfactory receptor neurons respond to low concentrations of chemical
odorants because there are membrane proteins in the receptor ending of
this sensory neuron that - Answer✔️✔️-can bind and respond to the specific
odorant

The sequence of events starting with a sensory stimulus and ending with a
change in membrane potential is called - Answer✔️✔️-sensory transduction




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