Contracting the gastrocnemius muscles to elevate the body on the toes involves a ________ lever
A) first-class
B) second-class
C) third-class
D) fourth-class
E) All of the answers are correct.
Answer: B
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Usually the urine of someone with a high-protein diet does not contain any bicarbonate ions, as all of it that is filtered is reclaimed from the tubules
Indicate whether this statement is true or false.
The trophoblast is mostly responsible for forming the ________
A) placental tissue B) allantois C) lining of the endometrium D) archenteron
Cholesterol, a type of lipid, is composed of 3 fatty acid chains attached to glycerol
Indicate whether the statement is true or false
What structure does "A" represent on the diagram of the plasma membrane?
A. Peripheral protein B. Phospholipid bilayer C. Membrane channel protein D. Internal membrane surface E. Integral protein