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?

Seen in some gram-positive bacilli, occurs when only the inner portion of a cell wall is deposited across the dividing cell. this new cross wall puts tension on the outer layer of the old cell wall. eventually, the outer wall breaks at its weakest point with a snapping movement that tears it most of the way around. the daughter cells can then remain hanging together almost side by side being held by a small remnant of the original outer wall. choose from the following statements the ones that correctly discuss reproduction using binary fission in a bacterial cell. select all that apply. view available hint(s) select all that apply. due to the stretching of the cytoplasmic membrane, both cells will contain a complete genome. each daughter cell will contain an equal number of organelles. the daughter cell will be a permanently smaller copy of the mother cell but will contain a complete genome. each daughter cell is an exact copy of the other, both genetically and morphologically

The table shows dates and appearance of index fossils. which rock layers can be dated most precisely? a) a layer containing both a fossil 4 and a fossil 3 b) a layer containing both a fossil 2 and a fossil 3 c) a layer containing both a fossil 1 and a fossil 4 d) a layer containing both a fossil 1 and a fossil 2

During which phase does earth see more than half of the moon's surface? 1)first quarter2)third quarter3)waxing gibbous4)waning crescent