A neuron membrane potential becomes more negative than the resting potential. What is this called?
Answer and explanation
Correct answer: A. Hyperpolarization
- Step 1: Excess potassium outflow makes the potential more negative. Answer: Hyperpolarization. Why not the others: Depolarization is less negative, repolarization is the return and threshold triggers firing.
Practise more Cell Biology, Genetics and Physiology.
Free questions with an explanation for every one, and full timed MCAT (Medical College Admission Test) mock tests.
More Cell Biology, Genetics and Physiology questions
- Which organelle contains hydrolytic enzymes for intracellular digestion?
- Which organelle is mainly responsible for modifying, sorting and packaging proteins for secretion?
- During which phase of mitosis do the sister chromatids separate and move to opposite poles?
- In which phase of meiosis does crossing over between homologous chromosomes occur?
- In a population in Hardy-Weinberg equilibrium, 4% of people have a recessive condition. What is the frequency of carriers?
- A woman who is a carrier of an X-linked recessive disease has children with an unaffected man. What proportion of their sons are expected to…