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TLS Online TPP Program

#Question id: 11145

Two fundamental concepts about the ion channels of a "resting" neuron are that the channels ________.

#Unit 7. System Physiology – Animal
  1. are always open, but the concentration gradients of ions frequently change
  2. are always closed, but ions move closer to the channels during excitation
  3. are open or closed depending on their type, and are specific as to which ion can traverse them
  4. open in response to stimuli, and then close simultaneously, in unison
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TLS Online TPP Program

#Question id: 1090

#Unit 4. Cell Communication and Cell Signaling

Binding of a signaling molecule to which type of receptor leads directly to a change in the distribution of ions on opposite sides of the membrane?
TLS Online TPP Program

#Question id: 8773

#Unit 9. Diversity of Life Forms

Which eukaryotic kingdom includes members that are the result of endosymbioses that included an ancient aerobic bacterium and an ancient cyanobacterium?
TLS Online TPP Program

#Question id: 2936

#Unit 2. Cellular Organization

The stable attachment of sister kinetochores to microtubules emanating from opposite spindle poles is called:
TLS Online TPP Program

#Question id: 19702

#Unit 13. Methods in Biology

What is aVL in augmented unipolar limb lead?
TLS Online TPP Program

#Question id: 9250

#Unit 9. Diversity of Life Forms

Of the following statements about protected areas that have been established to preserve biodiversity, which one is not correct?