BIO 1130 Lecture Notes - Lecture 5: Photosynthesis, Homo Erectus, Radiant Intensity

• School: University of Ottawa
• Department: Biology
• Course: BIO 1130
• Professor: Adam Brown

Document Summary

Absence of colour = connective tissue and hemoglobin. Effects additive based on combinations of alleles. Absorbs high-energy radiation such as uvr: high-energy radiation = spectrum of light, ultraviolet wave lengths of light. Its dark because also absorbs across visible light spectrum: also absorbs visible light, when we see a colour, when its reflected, we see a colour, absorptive property. Protects nucleus of cell against damage: pigment that protects cell, number of sources of damage (high energy light, internal damage due to free radicals) No pigment production chimpanzees (covered with fur) Has certain properties based on its function. Produce melanin in melanosomes: specialized cells created in the stratum that are responsible for the production of melanin pigments. Mature and migrate into dendrites: transfer the production, packaged into melanosomes, units = melanosomes. Transfer to keratinocytes: becomes the dead cells in the layer, stay at the dendrites afterwards. All humans have same amount of melanocytes. Differ in size and number of melanosomes.