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

The nerve fibre is another name for the nucleus of a neuron.

What is the normal direction for the movement of an action potential along part of a neuron

Oligodendrocytes form a regeneration tube to guide a regenerating nerve fibre to its proper destination.

During conduction by local current flow, current flows locally between the active and the adjacent inactive area of the cell membrane, thereby decreasing the potential in the inactive area to threshold.

The three major subdivisions of a cell are the ____________________, the ____________________, and the ____________________.

Match the terms, labelled a. through f., to their correct descriptions. (Options may be used more than once or not at all.) -selectively controls movement of molecules between the intracellular fluid and the extracellular fluid

What is cystic fibrosis caused by

A neuron fires an impulse by the ____________________ law.

Which of the following are NOT paired correctly

The signal-recognition protein recognizes both the ____________________ on the ribosome and the ____________________ on the ER, then delivers the proper ribosome to the proper site on the rough ER for binding.

Which of these structures is located in the nucleus of the cell

Secretory vesicles are about 200 times larger than transport vesicles.

The diffusion of potassium ions re-establishes the resting membrane potential in a neuron immediately after it develops an action potential.

Match the result, labelled a. or b., with the force and involved ion in question. (Options may be used more than once or not at all.) -electrical gradient for K⁺ at EK⁺

Match the ions, labelled a. through d., with their various roles. (Options may be used more than once or not at all.) -ion that has the predominant influence on the resting membrane potential

Match the terms, labelled a. through c., with their characteristics, labelled 1. (Options may be used more than once or not at all.) -directly uses inspired oxygen

Which of these statements does NOT apply to the plasma membrane

What is the term for a branching of axon terminals in which a single cell synapses with and influences many other cells

Match the result, labelled a. or b., with the force and involved ion in question. (Options may be used more than once or not at all.) -concentration gradient for Na⁺ at resting potential