Exam 2: Cell Physiology

Sodium and potassium ions are highly soluble in lipids.

Which of the following can be found within the nucleus

Which of these statements applies to mitochondria

The strength of a stimulus is coded by the ___________________________.

____________________ is the hindrance to electrical charge movement.

Which of the following is NOT a neuropeptide

The junction between two neurons is known as a(n) ____________________.

The predominant cation in the intracellular fluid is calcium.

Which of these organelles is associated with the rough endoplasmic reticulum

Cations are attracted to a more positively charged area along an electrical gradient.

____________________ join the lateral edges of epithelial cells together near their luminal borders, thus preventing passage of materials between the cells.

Match the terms, labelled a. through d., to their descriptions. (Options may be used more than once or not at all.) -composed of tubulin

Neuropeptides are large, ____________________ acting molecules.

In a(n) ____________________ transport, materials may be moved "uphill" and are concentrated in a cell.

When EPSPs originating from a single presynaptic input occur so close together in time that they add together, or sum, thereby bringing the postsynaptic cell to threshold, it is called ____________________.

When a neuron fires a signal, a resting membrane potential is converted into a(n) ____________________ potential.

Lysosomes that have completed their digestive activities are known as ____________________.

Action potentials are initiated at the axon hillock region because it has the lowest threshold voltage.

Which of these statements describes nicotinamide adenine dinucleotide (NAD)

The passive current flow of a graded potential fades quickly.