Exam 2: Cell Physiology

Match the cellular proteins, labelled a. through e., with their correct characteristic. -provides for transport of vesicles

Which of these statements describes electron transport chains

What type of junctions are desmosomes, tight, and gap junctions, respectively

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

The only way in which a neurotransmitter-receptor combination can influence the postsynaptic cell is to directly alter its permeability to specific ions.

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

Which of these statements refers to neural stem cells

Neuropeptides are stored in ____________________ vesicles.

Match the ions, labelled a. through d., with their various roles. (Options may be used more than once or not at all.) -ion whose equilibrium potential is opposite in charge of the resting membrane potential

Communication between neurons occurs by the release of ____________________, which are chemical messengers.

Which of these statements describes vaults

Extracellular messengers binding on surface receptors may exert effects on cells via all the following means EXCEPT which one

Which of the following occurs in convergence

The only means by which an extracellular chemical messenger can bring about a desired intracellular response is to activate a second messenger system.

In a graded potential, the direction of current flow is designated by the movement of positive charges.

The refractory period prevents action potentials from spreading back over the part of the membrane where the impulse has just passed.

How is ATP synthesized via electron transport and oxidative phosphorylation

Match the terms, labelled a. through c., to their descriptions. (Options may be used more than once or not at all.) -enable sperm to move

Match the terms, labelled a. through d., to their descriptions. (Options may be used more than once or not at all.) -essential for creating and maintaining an asymmetrical cell shape

When EPSPs occurring simultaneously from two different presynaptic inputs add together or sum to bring the postsynaptic cell to threshold, it is called ____________________.