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Systems Phys Lecture Questions

Terms in this set (11)

Which of these is NOT one of the four general categories of tissues that make up the human body?
A) Epithelial B) Collagen C) Connective D) NervousE) Muscle
Which concept is the defining feature of the discipline of physiology?
Descent with modificationB) HomeostasisC) EvolutionD) EquilibriumE) Differentiation
B
If the amount of sodium in the blood decreases, what would a negative feedback control mechanism be expected to do?
Decrease the amount of sodium in the bloodB) Increase the amount of sodium in the bloodC) Leave the amount of sodium unchangedD) Change the set point for sodiumE) Inhibit the ingestion of more sodium
...
Which of the following is an example of homeostasis?
(A)You take a hot shower and your body temperature increases(B)You go swimming in a cold lake and your body temperature decreases(C)You overeat for a week and you gain weight(D)You run a marathon and you get thirsty (E)None of the above
D
Nerve cells are most permeable to...
A)Sodium(B)Calcium(C)Potassium(D)Chloride(E)Potassium and Chloride equally
C
TRUE or FALSE. The inside of the cell/neuron is negatively charged relative to the outside.(A) TRUE(B) FALSE(C) NO CLUE
True
Recall the Na/K Pump. What is its job in a typical cell?(A) Pump 3 Na's out for every 2 K's in, passively(B) Pump 3 K's out for every 2 Na's in, actively(C) Pump 3 Na's out for every 2 K's in, actively(D) Pump 3 K's out for every 2 Na's in, passively(E) Pump 2 Na's out for every 3 K's in, actively
C
A neuron at rest has a resting potential of -70mV. You put this neuron in a solution where the concentration of potassium in the extracellular solution is much higher. What happens to the resting membrane potential?(A) It doesn't change(B) It gets more positive (depolarizes)(C) It gets more negative (hyperpolarizes)(D) Not enough information given
B
The ionic basis of the "upshoot" of the neuronal action potential is governed by...
(A) Na+ efflux(B) K+ efflux(C) K+ influx(D) Na+ influx(E) Ca2+ influx
D
Which ion is ABSOLUTELY critical in chemical synaptic transmission? (Hint: One example of a chemical synapse is the neuromuscular junction)
...
Which ion is ABSOLUTELY critical in chemical synaptic transmission? (Hint: One example of a chemical synapse is the neuromuscular junction)
...
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