A human cell that has 69 chromosomes is
A) diploid. B) triploid. C) aneuploid. D) euploid.
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Question 2) After birth, the foramen ovale is closed as a result of
A) increasing pressure in the right atrium.
B) increasing pressure in the left atrium.
C) decreased blood volume in the pulmonary veins.
D) increased resistance in the pulmonary circuit.
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Question 3) Which of the following provides the main source of energy for a newborn during its first
few days?
A) Glycogen B) Protein C) Glucose D) Fat
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Question 4) A procedure used to obtain enough fetal tissue sampled through the cervix to test for
genetic disorders without culturing cells is
A) chorionic villus sampling. B) amniocentesis.
C) ultrasonography. D) fetal cell sorting.
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Question 5) The respiratory areas are in the medulla oblongata and the ____ of the brainstem.
Fill in the blank(s) with correct word
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Question 6) Niacin can be synthesized in human cells from the essential amino acid ______.
Fill in the blank(s) with correct word
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Question 7) The kidneys help to regulate the hydrogen ion concentration of body fluids by altering
the rate at which hydrogen ions are secreted.
Indicate whether the statement is true or false
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Question 8) Many hydrogen ions are secreted between the plasma in the peritubular capillaries and
the filtrate in the nephron loop.
Indicate whether the statement is true or false
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Question 9) Which of the following provides mechanical contraception?
A) Combined hormone contraceptives B) The rhythm method
C) The minipill D) A diaphragm
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Question 10) The ease with which the lungs can be expanded during breathing is called
______.
Fill in the blank(s) with correct word
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