Exam 2: Cell Physiology

The hydrophobic interior of the lipid bilayer of the plasma membrane blocks the passage of water-soluble substances.

The summation of all IPSPs and EPSPs determines whether a postsynaptic neuron will fire.

At resting membrane potential, no ionic fluxes are taking place across the membrane.

Net diffusion of water down its own concentration gradient toward an area of higher solute concentration is known as ____________________.

Which of these descriptions applies to the movement of molecules across the plasma membrane

At resting membrane potential, passive and active forces exactly balance each other so there is no net movement of ions across the membrane.

The nucleus indirectly governs most cellular activities by directing the kinds and amounts of various enzymes and other proteins that are produced by the cell.

Which of these structures is associated with the secretion of proteins produced by the ER

The rising phase of the action potential is due to which of these conditions

A/an ____________________ solution has the same osmolarity as normal body cells.

A spike is another name for the axon of a neuron.

Which of the following happens at resting membrane potential