A _________ is an elongated, rigid object that can be used to alter the distance of movement produced by a force
Fill in the blank with correct word.
lever
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Enamel is found in the crown of a tooth, whereas dentin is part of both the crown and the root.
Answer the following statement true (T) or false (F)
In people who stand for long periods, blood tends to pool in the lower limbs and this may result in varicose veins. What causes the varicose veins?
A. An aneurysm or weak point in an artery B. An aneurysm or weak point in a vein C. Failure of the venous valves D. Failure of the lymphatic valves E. A ruptured aneurysm in a vein
Which of the following is composed of distal convoluted tubule cells that contact the afferent arteriole?
A. Podocytes B. Mesangial cells C. Macula densa D. Juxtaglomerular cells E. Juxtamedullary cells
A sequence of amino acids bonded together in a linear chain is called a
A) primary structure. B) secondary structure. C) tertiary structure. D) quaternary structure. E) tripeptide.