What must be true of the concentration of potassium and sodium inside the neuron? Why can some ions move across membranes but others cannot?
How would permeability change if types of channels in a neuron change?
What is the purpose of having leak and gated channels for the neuron?
What are the charges both inside and outside of the neuron before you click the stimulate neuron button?
What are the charges both inside and outside of the neuron after the simulation is complete?
What happens to the charge during the stimulation?
What happens after the gated channels close?
How many potassium ions move into the cell while how many sodium ions move out of the cell?
What does the yellow line represent that runs along the neuron?

the elements of art are the visual tools that the artist uses to create a composition. these are line, shape, color, value, form, texture, and space.

the principles of art and design are balance, contrast, emphasis, movement, pattern, rhythm, and unity/variety.

answer: the correct option is d. enzyme

lactase and carbonic anhydrase are the examples of enzymes.

lactase is an enzyme, which is present in the small intestine of mammals. it in the digestion of the disaccharide, lactose ( milk sugar) by converting it into two monosachharide, which are glucose and galactose.

carbonic anhydrase is present in the red blood cells. this enzyme plays significant role in the transport of co₂. it in the conversion of co₂ and h₂o into carbonic acid, which is then dissociated into bicarbonate ions and hydrogen ions.

it is a limiting nutrient limited by a single nutrient in the ecosystem, & the single goes very slow.