The epidermal ridges and dermal ________ increase the area of contact between the epidermis and dermis to help connect these layers.
Fill in the blank(s) with the appropriate word(s).
papillae
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Which of the following is not true of meiosis I?
A) reductional division occurs B) 4 haploid gametes are formed C) number of chromosomes is reduced from 46 to 23 in daughter cells D) diploid daughter cells form E) daughter cells contain sister chromatids
What component of angular acceleration represents the rate of change in direction of a rotation body?
A. tangential acceleration B. radial acceleration C. linear acceleration D. none of the above
Some integral proteins form ________ that let water molecules, ions, and small water-soluble compounds cross the membrane.
Fill in the blank(s) with the appropriate word(s).
Identify the role of the urinary system in acid-base balance
1. The kidneys can secrete bicarbonate ions when the pH of the blood rises. 2. The kidneys contribute to acid-base balance by excreting fixed acids that the lungs cannot excrete. 3. The kidneys can manufacture new bicarbonate ions when the pH of the blood falls. 4. The kidneys contribute to acid-base balance by controlling the concentration of bicarbonate ions in the blood. A) 2, 3, 4, but not 1 B) 1, 3, 4, but not 2 C) 1, 2, 3, 4 D) 1, 2, 3, but not 4