Exam 2: Cell Physiology

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. permeability of a resting nerve cell membrane to K⁺ B. permeability of a resting nerve cell membrane to Na⁺

At the synapse, a presynaptic neuron signals a ____________________ neuron.

A single synaptic knob contains two different transmitters-one that produces EPSPs and one that produces IPSPs.

Which statement is NOT correct regarding ribosomes?

The metabolism of acetyl CoA into the citric acid cycle depends on the availability of ____________________ for the cell.

How are action potentials propagated?

Which statement regarding the plasma membrane is NOT correct?

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

What is the definition of aerobic?

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

Which of the following statements correctly describes when spatial summation occurs in a postsynaptic neuron?

Match the terms, labelled a. through i., to their descriptions. (Options may be used more than once or not at all.) a.endoplasmic reticulum (ER) b.Golgi complex c.lysosome d.peroxisome e.mitochondrion f.vault g.free ribosome h.microtubule i.microfilament -contains powerful oxidative enzymes important in detoxifying various wastes

Mitochondria are presumed to be descendants of primitive bacterial cells.

When equilibrium is achieved and no net diffusion is taking place, there is no movement of molecules.

Match the terms, labelled a. through f., to their correct descriptions. (Options may be used more than once or not at all.) a.plasma membrane b.nucleus c.cytoplasm d.cytosol e.organelles f.cytoskeleton -responsible for cell shape and movement

Match the terms, labelled a. through i., to their descriptions. (Options may be used more than once or not at all.) a.endoplasmic reticulum (ER) b.Golgi complex c.lysosome d.peroxisome e.mitochondrion f.vault g.free ribosome h.microtubule i.microfilament -consists of stacks of flattened sacs

Which of the following does NOT correctly describe graded potential?

Match the vesicles, labelled a. through c., with their characteristics. (Options may be used more than once or not at all.) a.transport vesicles b.coated vesicles c.secretory vesicles -contents are unloaded at a specific intracellular compartment

Divergence refers to the neuronal arrangement wherein the dendrites diverge to synapse with as many presynaptic inputs as possible.

Which of the following statements is NOT correct?