... ) and nonflying mammals ( Akodon montensis, Mus musculus and Rattus norvegicus ). Using standard pharmacokinetic techniques in intact animals, we confirmed the greater paracellular nutrient absorption in the fliers, comparing one species in each group. Then we conducted in situ intestinal perfusions...

... are variable. Our goal was to examine the mechanical properties of these tissues under conditions mimicking the in vivo state. Tissue strains were measured in the rat( Rattus norvegicus ) soleus muscle directly from the spacing of metal markers implanted within the tissues of interest using an X-ray video...

... extraocular muscle M-line myomesin creatine kinase myogenesis rat Rattus norvegicus The sarcomere is the basic structural and functional unit of striated musculature. Within each sarcomere, two lattices of thin (actin) myofilaments,maintained in register by transversely oriented Z-lines...

... that the period of a physical pendulum is proportional to its rotational inertia 0.50 , and measured rotational inertia in two groups of vertebrates with greatly different body shapes: murine rodents ( Mus domesticus and Rattus norvegicus ) and lizards ( Iguana iguana and Varanus exanthematicus ). Rotational...

...Durmus Deveci; Stuart Egginton SUMMARY The physiological, metabolic and anatomical adaptations of skeletal muscle to chronic cold exposure were investigated in Wistar rats ( Rattus norvegicus ), a species that defends core temperature, and Syrian hamsters ( Mesocricetus auratus ), which may adopt...

.... Microsomes were prepared from the kidney and brain of the rat ( Rattus norvegicus ) and the cane toad ( Bufo marinus ), and Na + /K + -ATPase molecular activity was determined. The membrane lipids surrounding this enzyme were isolated and phospholipids prepared. ‘Surface pressure/area’ isotherms were...

...-mail: ggillis@oeb.harvard.edu 29 5 2001 © The Company of Biologists Limited 2001 2001 terrestrial locomotion gait muscle function electromyography sonomicrometry rat Rattus norvegicus biceps femoris vastus lateralis. Muscles provide the forces and mechanical work...

...Gerald H. Jacobs; John A. Fenwick; Gary A. Williams SUMMARY Rats ( Rattus norvegicus ) have two classes of cone, one containing an ultraviolet (UV)-sensitive photopigment and the other housing a pigment maximally sensitive in the middle (M) wavelengths of the visible spectrum. The manner in which...

... (for reviews, see Moore and Korzick, 1995 ; Schaible and Scheuer, 1985 ). hypertrophy voluntary exercise myocyte stimulation frequency sub-epicardium sub-endocardium rat Rattus norvegicus © 2001 by Company of Biologists 2001 18 12 2000 26 2 2001 * Author...

... energy during locomotion is of functional significance and probably depends on locomotor behaviour. 19 02 1996 ©The Company of Biologists Limited 1996 rat hopping mouse skeletal muscle elasticity Rattus norvegicus Notomys alexis During locomotion, animals expend...