Secondary spermatocytes each contain
A) 23 chromosomes.
B) 23 pairs of chromosomes.
C) twice the diploid number of chromosomes.
D) 46 pairs of chromosomes.
E) 46 chromosomes.
A
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The function of the pericardial fluid is to
A) store calcium for the heart. B) provide oxygen to the heart. C) provide fuel to the heart. D) remove waste products from the heart. E) reduce friction between the heart and the pericardium.
Which is the most abundant type of cellular element in the blood?
a. erythrocytes. b. neutrophils. c. leukocytes. d. lymphocytes. e. platelets.
Most O2 is transported [ __ ], and most CO2 is transported [ __ ]
1.physically dissolved in plasma; bound to hemoglobin 2.bound to hemoglobin; bound to hemoglobin 3.bound to hemoglobin; as bicarbonate 4.physically dissolved in plasma; physically dissolved in plasma
Which of the following is not a function of cerebrospinal fluid?
A) provides cushioning for delicate neural tissues B) provides buoyant support for the brain C) acts as a transport medium for nutrients D) provides ATP for impulse transmission E) acts as a transport medium for waste products