Imagine a neuron lost the ability to close its sodium channels. Could this neuron still propagate action

potentials? What will be an ideal response?


No! If the voltage-gated sodium channels could not be shut, the sodium would leak back into the cell
as fast as the sodium-potassium pumps could move it out. As a result, the cell would be unable to
maintain a resting membrane potential of - 70mV. Without that, the depolarization characteristic of an
action potential could not occur.

Biology & Microbiology

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The order Lactobacillales within Firmicutes are also called the lactic acid bacteria, because these bacteria

A) can aerobically catabolize lactic acid. B) can ferment lactate. C) produce lactate. D) uniquely require lactic acid as a precursor for cell wall biosynthesis.

Biology & Microbiology

Which of the following components is never found in a virus particle?

a. protein b. DNA c. RNA d. ribosomes

Biology & Microbiology

A flower is sweet smelling and reflects UV

light. This flower is likely ___ pollinated.

a. bee b. hummingbird c. bat d. fly e. wind

Biology & Microbiology

Aside from the sample being a random sample from the target population, and the latent variable model determining function is correct, what critical assumption guarantees the consistency of the maximum likelihood probit and logit estimates for the coefficients?

A. The predictions need to be between zero and one. B. The coefficients are jointly statistically significant. C. The model errors and the treatment variables are independent. D. The sample size is large.

Biology & Microbiology