______ stimulates the interstitial cells of the testes to secrete __
Fill in the blank(s) with the appropriate word(s).
lutenizing hormone (LH); testosterone
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Red marrow is the major site of ________ formation
a. all of the choices b. bone c. cartilage d. blood cell
The placenta, which sustains the developing embryo and fetus, originates only from maternal tissue.
Answer the following statement true (T) or false (F)
Evolution of the eyes into a forward-directed position allowed for better
a. detection of shapes in three dimensions. b. detection of movements in three dimensions. c. response to variations in color. d. response to variations in light intensity. e. all of these.
The following proteins are important for cell movement. Match the following proteins with their function
myosin _____ A. nucleation of new actin filaments at the side of an existing filament ARP proteins _____ B. regulation of the availability of actin monomers profilin _____ C. important for the growth of straight, unbranched actin filaments integrins _____ D. contracting the rear of the cell formins _____ E. involvement in focal contacts Fill in the blank(s) with correct word