The first sign of puberty in females is ________.
A. menarche
B. breast development
C. axillary hair growth
D. rapid longitudinal growth of the skeleton
Answer: D
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The ____________________ is the principal site for metabolic interconversions of nutrient molecules
Fill in the blank(s) with correct word
Mucus is moved along the lining of the trachea by extensions from cell membranes known as
A. cilia. B. flagella. C. microvilli. D. stereovilli.
Na+ ions can move from the ECF into the ICF by passing through secondary active transport carriers, simple diffusion channels, and the sodium-potassium pumps
Indicate whether the statement is true or false
What is the main function of cellular tight junctions?
A. They resist forces that tend to pull cells apart. B. They form barriers that restrict the passage of materials through the extracellular space between cells. C. They are protein channels that allow the movement of ions between the cytosol of adjacent cells. D. They are spaces that allow movement of substances between the interior of the nucleus and the cytosol. E. They hold the genetic material in a tightly coiled conformation.