Glomerular filtration rate is the rate at which the glomerulus (a microscopic part of your kidney) is able to filter your blood. It is generally calculated using the Cockroft-Gault formula based on your creatinine level (a product of muscle breakdown that is part of routine blood work) and your age and weight.
The muscle clean is very similar to a hang clean, except the bar sits in a higher position above the knee. Hinge back slightly and use a short, explosive hip action to accelerate the bar vertically and rack it on the shoulders. The arms do a fair amount of work to muscle the weight to the shelf position.
The three main types are skeletal muscle, smooth muscle, and cardiac muscle. Skeletal muscle has a striped appearance earning its other name striated muscle. It is designed to work at a moments notice but it tires easily. Smooth muscle is not striped. It is designed to work slowly so therefore it tires slowly.