Exam 3: Cell Structure and Function

Glycolysis is the metabolic process of breaking down a glucose molecule to form

The phase of cellular metabolism in which energy is released during breakdown of nutrient sources is anabolism.

Gap junctions are connecting channels that allow passage of small molecules from one cell to the next and are especially important for

Phospholipids spontaneously form lipid bilayers,because they are

Repolarization of a neuron after a depolarizing action potential is because of

The organelle that contains enzymes necessary for oxidative phosphorylation to produce ATP is the

Some individuals inherit a gene that results in dangerously high blood cholesterol caused by impaired endocytosis of low-density lipoproteins (LDLs).

An increase in extracellular potassium ion from 4.0 to 6.0 mEq/L would

Ribosomes are very important organelles within the cell that have the function of

Ion channels open and close in response to all the following except

The cardiac drug digitalis enhances myocardial contraction,because it

The benefit of glycolysis is that this second stage of catabolism supplies

The resting membrane potential in nerve and skeletal muscle is determined primarily by

Excitable cells are able to conduct action potentials because they have

GTP-binding proteins (G-proteins)function to

During conditions of prolonged insufficient oxygen availability (e.g.,respiratory or cardiovascular disease)anaerobic glycolysis accumulated pyruvate can lead to lactic acidosis.

Cell-to-cell communication through secretion of chemical signals into the bloodstream to target cells throughout the body is called _____ signaling.