Definition of sarcomere A sarcomere is the functional unit of skeletal muscle. This means that it is the most basic unit that makes up our skeletal muscle. Skeletal muscle is the type of muscle that initiates all of our voluntary movement. Herein lies the main purpose of the sarcomere. Sarcomeres can initiate large sweeping movements […]


What is photosynthesis? Photosynthesis takes place inside plant cells in tiny objects called chloroplasts. Chloroplasts contain a green substance called chlorophyll. This absorbs the light energy needed for photosynthesis to occur. Plants and algae can only photosynthesize in light. Plants obtain carbon dioxide from the air through their leaves and water from the soil through […]


Photophosphorylation The third type of photophosphorylation to produce ATP is found only in cells that photosynthesize. This process is similar to oxidative phosphorylation in several respects. A major difference is the ultimate source of energy for ATP synthesis. In oxidative phosphorylation, energy comes from electrons produced by the oxidation of biological molecules. In photosynthesis, energy […]