Answer:
Explanation:
How the resting membrane potential is established in a neuron. ... Ions move down their gradients via channels, leading to a separation of charge that ... through brief, controlled changes in the permeability of their cell membrane to particular ... If you did this, you would measure an electrical potential difference, or voltage, ...
True, the process is called the sliding filament model of muscle contraction.
According to the sliding filament theory, muscle proteins slide past one another to produce movement during muscular contractions. The sliding filament theory postulates that during muscle contraction, the actin (thin filaments) and myosin (thick filaments) of muscle fibers glide past each other while remaining at essentially constant lengths. A protein called myosin transforms ATP (chemical energy) into mechanical energy, causing movement and push. T
his motion causes the muscles to contract and non-muscle cells, like those in the mitosis and meiosis, to move (cell division). Additionally, the actin-myosin interaction and actin polymerization are what cause a cell to move across a surface. When troponin molecules link to calcium ions in filaments, actin filaments' myosin-binding sites become visible, promoting bridge construction. ATP serves as an energy source and powers this process. Myosin molecules' heads undergo ATP hydrolysis, changing their shape and allowing them to bind to actin filaments.
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Answer:
central nervous system
Explanation:
it consists of the brain and spinal cord
a lack of permanently frozen soil.
Explanation:
Conifer trees dominate boreal forests rather than tundra because of a lack of permanently frozen soil.
Tundras have permanently frozen soil and cannot support plant life to a very large extent.
- These frozen soils are called permafrost.
- Permafrost are soils that have remained frozen for more than two years.
- Plants require nutrients, water, air and organic matter from the soil to function and carryout their own life processes.
- In a tundra, these materials are held and trapped in the freeze.
- Therefore, like any other plants that have not adapted to this severe condition, they cannot grow well in this biome.
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