A species of the family Ranidae occurring in a wide variety of habitats from within the Arctic Circle to South Africa, Australia, etc.
A species of the true toads, Bufonidae, widely distributed in the United States and Europe.
A genus of IRIDOVIRIDAE which infects fish, amphibians and reptiles. It is non-pathogenic for its natural host, Rana pipiens, but is lethal for other frogs, toads, turtles and salamanders. Frog virus 3 is the type species.
The family of true frogs of the order Anura. The family occurs worldwide except in Antarctica.
A highly variable species of the family Ranidae in Canada, the United States and Central America. It is the most widely used Anuran in biomedical research.
An order of the class Amphibia, which includes several families of frogs and toads. They are characterized by well developed hind limbs adapted for jumping, fused head and trunk and webbed toes. The term "toad" is ambiguous and is properly applied only to the family Bufonidae.
Proteins obtained from species in the class of AMPHIBIANS.
A species of the family Ranidae (true frogs). The only anuran properly referred to by the common name "bullfrog", it is the largest native anuran in North America.
Contractile tissue that produces movement in animals.
DNA virus infections refer to diseases caused by viruses that incorporate double-stranded or single-stranded DNA as their genetic material, replicating within host cell nucleus or cytoplasm, and including various families such as Herpesviridae, Adenoviridae, Papillomaviridae, and Parvoviridae.
An edible species of the family Ranidae, occurring in Europe and used extensively in biomedical research. Commonly referred to as "edible frog".
The repeating contractile units of the MYOFIBRIL, delimited by Z bands along its length.
A process leading to shortening and/or development of tension in muscle tissue. Muscle contraction occurs by a sliding filament mechanism whereby actin filaments slide inward among the myosin filaments.
The functions of the skin in the human and animal body. It includes the pigmentation of the skin.
Large, multinucleate single cells, either cylindrical or prismatic in shape, that form the basic unit of SKELETAL MUSCLE. They consist of MYOFIBRILS enclosed within and attached to the SARCOLEMMA. They are derived from the fusion of skeletal myoblasts (MYOBLASTS, SKELETAL) into a syncytium, followed by differentiation.
Wormlike or grublike stage, following the egg in the life cycle of insects, worms, and other metamorphosing animals.
Muscular contractions characterized by increase in tension without change in length.
The voltage differences across a membrane. For cellular membranes they are computed by subtracting the voltage measured outside the membrane from the voltage measured inside the membrane. They result from differences of inside versus outside concentration of potassium, sodium, chloride, and other ions across cells' or ORGANELLES membranes. For excitable cells, the resting membrane potentials range between -30 and -100 millivolts. Physical, chemical, or electrical stimuli can make a membrane potential more negative (hyperpolarization), or less negative (depolarization).
Inorganic compounds derived from hydrochloric acid that contain the Cl- ion.
A species of the family Ranidae which occurs primarily in Europe and is used widely in biomedical research.
A quality of cell membranes which permits the passage of solvents and solutes into and out of cells.
The outer covering of the body that protects it from the environment. It is composed of the DERMIS and the EPIDERMIS.
A member of the alkali group of metals. It has the atomic symbol Na, atomic number 11, and atomic weight 23.
Elements of limited time intervals, contributing to particular results or situations.
The rate dynamics in chemical or physical systems.
Use of electric potential or currents to elicit biological responses.