When an action potential arrives at the presynaptic membrane, depolarization occurs, opening voltage-gated channels. this allows an influx of ca2+ ions that are needed to trigger the release of neurotransmitter into the synapse. if a calcium channel blocker, such as cadmium, is injected into the presynaptic cell, which explanation best describes cadmium's effect on the transmission of the impulse?

Chlorophyll is found in plant leaves and absorbs light from the sun to enable plants to perform photosynthesis. magnesium is an important component of chlorophyll. the concentration of magnesium ions is higher in the root-hair cells of plants than in the soil. which mechanism of ion uptake would best enable a plant to produce a steady supply of chlorophyll? osmosis diffusion passive transport active transport

When is your respiration rate likely to change? a. when your intestines are digesting b. when your cells have too much glucose c. when your cells need more oxygen d. when your liver is working after a meal

Ascientist is examinin the cell is disrupted when she damages one specific type of macromolecule g the function of macromolecules in a cell she notices that movenent of large molecules into and out of