Exam 2: Cell Physiology

Which of the following triggers the exocytosis of secretory products by entering a cell in response to a specific neural or hormonal stimulus?

If presynaptic neuron Y is stimulated, the postsynaptic cell membrane becomes slightly depolarized. What kind of synapse is involved between presynaptic neuron Y and the postsynaptic neuron?

Select the substance that promotes cell adhesion.

The three characteristics that determine the kind and amount of material that can be moved across a membrane by carrier-mediated transport are ____________________, ____________________, and ____________________.

Permeability of which of these ions is affected by a positive feedback mechanism once threshold is reached?

Repeated firings of one presynaptic neuron can produce ____________________ summation.

The following questions refer to comparative concentrations, permeabilities, and potentials under various circumstances. Match the relationship between the two items, a. and B.., with the qualifications labelled a. through c. (Options may be used more than once or not at all.) a.A is greater than B b.B is greater than A c.A and B are equal -A. concentration of A^- in the extracellular fluid B. concentration of A^- in the intracellular fluid of a resting nerve cell

Match the terms, labelled a. through c., to their descriptions. (Options may be used more than once or not at all.) a.flagella b.cilia c.microvilli -sweep mucus and debris out of respiratory airways

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

The smooth ER specializes in protein metabolism.

Which of the following correctly describes the nodes of Ranvier?

A neuron fires an impulse by the ____________________ law.

Phagocytosis is a specialized form of endocytosis used for bringing in extracellular fluids.

Match the terms, labelled a. through c., to their descriptions. (Options may be used more than once or not at all.) a.flagella b.cilia c.microvilli -increase the surface area of the kidney tubules

Which of these statements concerning a threshold potential is correct?

Which of these processes refers to extrusion of materials to the exterior of the cell through the plasma membrane?

The grand postsynaptic potential depends on the sum of activity of the presynaptic inputs.

Which of the following concerning the plasma membrane is correct?

The neuronal relationship in which a single presynaptic cell branches to terminate on many other cells is called ____________________.

Coated vesicles enclose a representative mixture of proteins present in the Golgi sac before budding off.