Name the 4 main classes of atp-powered pumps.

P-class pumps, V-class proton pumps, F-class proton pumps, and ABC superfamily.

Explanation:

The P-class pump can be found at the Plasma membrane of all eukaryotic cells (Ca2+ pump), and Sarcoplasmic reticulum membrane in muscle cells. All P-class ion pumps possess 2 identical catalytic subunits that contain an ATP-binding site.  V-class proton pumps can be found at endosomal and lysosomal membranes in animal cells, in the plasma membrane of osteoclasts and some kidney tubule cells.  F-class proton pumps can be found at the inner mitochondrial membrane and bacterial plasma membrane. ABC superfamily can be found in bacterial plasma membranes (amino acid, sugar, and peptide transporters), and mammalian plasma membranes.

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.