Answer:
The circulatory system is divided into systemic circulation and pulmonary circulation.
Explanation:
Systemic circulation carries oxygenated blood from the left ventricle to the rest of the body while pulmonary circulation carries deoxygenated blood away from the right ventricle.
According to the cross-bridge model of muscle contraction, the muscles stiffen after death because ATP cannot bind and directly release the myosin head from the actin filament.
<h3>What is myosin?</h3>
Myosin and actin are two essential proteins in muscle cells that interact during muscle contraction.
Adenosin Triphosphate (ATP) is a key high-energy molecule required during muscle contraction that binds to myosin and whose hydrolysis enables to produce movement.
In conclusion, according to the cross-bridge model of muscle contraction, the muscles stiffen after death because ATP cannot bind and directly release the myosin head from the actin filament.
Learn more about myosin and actin here:
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The binding of Beta-lactam antibacterial drugs to proteins in cell membranes cause <u>bacterial lysis and cell death.</u>
<u></u>
β-Lactam antibiotics inhibit bacteria by binding covalently to PBPs in the cytoplasmic membrane. These target proteins catalyze the synthesis of the peptidoglycan that forms the cell wall of bacteria.
β-lactam antibiotics are bactericidal, and act by inhibiting the synthesis of the peptidoglycan layer of bacterial cell walls. The peptidoglycan layer is important for cell wall structural integrity, especially in Gram-positive organisms.
The peptidoglycan layer being the outermost and primary component of the wall. Alterations of PBPs can lead to β-lactam antibiotic resistance.
To learn more about Beta-lactam antibacterial drugs, here
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Well, it wasn't what the articles of confederation did, its more of the power it made the people feel. it wasn't until late 1700s until they realized they need to ratify(fix ) it and make it a new constitution
