Which term describes the difference in the concentrations of a substance across a cell's membrane?
a. diffusion membrane
b. concentration membrane
c. concentration gradient
d. molcular concentration

Always use significant figure rules. remember that these rules apply to all numbers that are measurements. if a vector that is 3 cm long represents 30 km/h, what velocity does a 5 cm long vector which is drawn using the same scale represent? a.100 km/h b.60km/h c.50km/h

Differences between compact bone and cartilage

What initially causes a nerve impulse? release of enzymes out of the neuron movement of chemicals into the dendrites of the neuron pathogens attacking the dendrites of the neuron red blood cells bathing the neuron