Search over 10,000 free study notes

A first messenger is a hormone which binds to a receptor on the plasma membrane of a cell and causes a change to happen inside the cell

Homeostasis is maintaining a constant internal environment. It works by using control systems and allows cells to function normally.

The resting potential is a result of the concentrations of the sodium and potassium ions inside the neuron compared to outside. The leaky channels in the sensory neuron membrane allow the movement of Na+ ...

The water potential of the concentrated sugar solution is much lower than the water potential inside the cells of the potato chip. Therefore, the water molecules move down a concentration gradient out of ...

Thin waxy cuticle - to protect the leaf without blocking the lightThin transparent epidermis - to allow more light to reach the palisade cellsLayers of palisade cells on the top surface - to absorb light<...