The nurse cells of the seminiferous tubules do all of the following except
A) maintain the blood testis barrier.
B) support spermiogenesis.
C) secrete inhibin.
D) secrete testosterone.
E) secrete androgen-binding protein.
D
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For a weight to be lifted, which of the following must occur?
A) isotonic muscle contraction with a force less than the load B) isometric muscle contraction with a force greater than the load C) isotonic muscle contraction with a force greater than the load D) either isometric or isotonic muscle contraction with a force greater than the load E) either isotonic muscle contraction with a force greater than the load or a force less than the load
In the formation of a compound of sodium chloride,
A. a chlorine atom donates an electron to a sodium atom.?B. a chloride ion donates two protons to a sodium ion.?C. a sodium atom donates an electron to a chlorine atom.?D. a sodium ion donates two electrons to a chlorine atom.?E. the sodium and chlorine atoms share a pair of electrons equally.
True or False? A cracker will "melt in your mouth" because of the action of lingual lipase.
Answer the following statement true (T) or false (F)
What is the "group name" for a motor nerve fiber and all the muscle fibers it stimulates?
A) motor end plate B) myasthenia gravis C) synaptic terminal D) motor unit