PhysioEx Exercise 3 Activity 1-6 Questions with 100% Correct Answers

PhysioEx Exercise 3 Activity 1-6 Questions with 100% Correct Answers What is the approximate concentration of K+ inside a typical cell (intracellular concentration)? a. 150 mM b. 5 mM c. 0 mM d. 15 mM - Answer️️ -150 mM What is the approximate concentration of K+ outside a typical cell (extracellular concentration)? a. 150 mM b. 5 mM c. 0 mM d. 15 mM - Answer️️ -5 mM What is the approximate concentration of Na+ inside a typical cell (intracellular concentration)? ©SOPHIABENNETT@ Monday, August 26, 2024 6:09 AM Thompson Rivers University (TRU) 2 a. 150 mM b. 5 mM c. 0 mM d. 15 mM - Answer️️ -5 mM What is the approximate concentration of Na+ outside a typical cell (extracellular concentration)? a. 150 mM b. 5 mM c. 0 mM d. 15 mM - Answer️️ -150 mM A negative membrane potential was recorded when the tip of the microelectrode was a. in the extracellular solution, just outside the cell body b. just inside the cell body c. just inside the axon ©SOPHIABENNETT@ Monday, August 26, 2024 6:09 AM Thompson Rivers University (TRU) 3 d. both inside the cell body and inside the axon - Answer️️ -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? a. an increase in extracellular K+ b. a decrease in extracellular K+ c. an increase in extracellular Na+ d. a decrease in extracellular Na+ - Answer️️ -an increase in extracellular K+ Which of the following has the most negative voltage? a. between the outside of the axon and outside the cell body with control K+ ECF b. between the outside of the axon and outside the cell body with High K+ ECF c. between the inside of the axon and the outside of the axon with control K+ ECF ©SOPHIABENNETT@ Monday, August 26, 2024 6:09 AM Thompson Rivers University (TRU) 4 d. between the inside of he axon and the outside of the axon with the High K+ ECF - Answer️️ -between the inside of the axon and the outside of the axon with control K+ Assuming that the resting potential of a sensory neuron is -70 mV, which of the following represents a depolarization? a. a change to -90 mV b. staying at -70 mV c. a change to -60 mV - Answer️️ -a change to -60 mV Which of the following is a sensory modality (type of sense)? a. touch b. smell c. sight d. pain e. all of the above - Answer️️ -e. all of the above Which of the following is a sensory stimulus? ©SOPHIABENNETT@ Monday, August 26, 2024 6:09 AM Thompson Rivers University (TRU) 5 a. pressure b. chemical odorants c. light d. all of the above - Answer️️ -d. all of the above Which of the following is true of the response of a sensory neuron to the appropriate sensory stimulus? a. It can be called a receptor potential, and it is a graded potential. b. It is a change in the resting membrane potential. c. both a and b - Answer️️ -c. both a and b A very intense stimulus can sometimes stimulate sensory