BIOL-K - Biology BIOL-K 103 Lecture Notes - Lecture 2: Dorsal Nerve Cord, Endoplasmic Reticulum, Frog
27 Apr 2016
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True body cavity lined completely by mesoderm. Subphylum: vertebrata: aquatic and terrestrial organisms, distinct head and trunk. Supported by cartilage/vertebrate structures in adult form. Notochord, becomes nervous system: well developed brain/sensory organs. Dorsal nerve cord: closed circulatory system, blood doesn"t freely exit vessels, goes to capillaries to do gas exchange, ex. Order: anura: aquatic and terrestrial organisms, protruding eyes, cleft tongue, maxiallary (found along upper jaw) and vomerine (roof of the mouth) teeth, semi-permeable skin. Functions: producing body movements, stabilizing body positions, storing/moving substances within body, generating heat. Properties: electrical excitability (action potential, contractility, extensibility, elasticity. Sarcomere functional active unit of muscle, where actin and myosin overlap: thick filaments myosin, thin filaments actin, tropomyosin, troponin. Sarcolemma is the plasma membrane of the muscle cells. Digestive system: processes food so it can be absorbed through intestinal wall into bloodstream. Organs: stomach, intestines (small and large, gall bladder, spleen. Urogenital system: aids in extracting/processing wastes from blood and reproduction.
