UTA A&P II Practice Exam Ch 18-21 Questions with Correct Answers Latest Update
2025/2026
1) Which of these descriptions best matches the term B lymphocytes?
A) produce antibodies in response to antigens
B) kill bacteria using hydrogen peroxide
C) adhere to collagen beneath endothelium
D) often elevated in allergic individuals
E) coordinate immune response - Answers A) produce antibodies in response to antigens
2) Which of the following is a function of the blood?
A) transport of gases
B) transport of nutrients and wastes
C) transport of body heat
D) defense against toxins and pathogens
E) all of the above - Answers E) all of the above
3) _______controls release of glucocorticoids; _____ stimulates testosterone secretion in the
testes; ______ causes the kidneys to retain sodium.
A) CRH, luteinizing hormone, aldosterone.
B) ACTH, FSH, ADH.
C) ACTH, luteinizing hormone, aldosterone.
D) ACTH, luteinizing hormone, ADH.
E) CRH, FSH, ADH. - Answers C) ACTH, luteinizing hormone, aldosterone.
4) Hemolytic disease of the newborn may result if
A) the mother is Rh positive and the father is Rh negative.
B) both the father and the mother are Rh positive.
C) an Rh-positive mother carries an Rh-negative fetus.
D) an Rh-negative mother carries an Rh-positive fetus.
,E) both the father and the mother are Rh negative - Answers D) an Rh-negative mother carries
an Rh-positive fetus.
5) Acetylcholine slows the heart because it
A) opens potassium ion channels in SA node cells.
B) decreases the threshold.
C) opens sodium-calcium ion channels in SA node cells.
D) causes the pacemaker potential to depolarize more quickly.
E) A and C only - Answers A) opens potassium ion channels in SA node cells.
6) The chief differences between plasma and interstitial fluid involves the
A) concentration of electrolytes.
B) concentration of proteins.
C) concentration of nitrogen wastes.
D) concentration of glucose.
E) concentration of water. - Answers B) concentration of proteins.
7) Blood returning to the heart from the systemic circuit first enters the
A) right atrium.
B) conus arteriosus.
C) left atrium.
D) left ventricle.
E) right ventricle. - Answers A) right atrium.
8) The pulmonary semilunar valve prevents backward flow into the
A) pulmonary trunk.
B) pulmonary veins.
C) left atrium.
D) right ventricle.
E) aorta. - Answers D) right ventricle.
, 9) Steroid hormones
A) bind to receptors in the nucleus of their target cells.
B) are transported in the blood dissolved in the plasma.
C) remain in circulation for relatively short periods of time.
D) cannot diffuse through cell membranes.
E) are proteins. - Answers A) bind to receptors in the nucleus of their target cells.
10) Contractions of the papillary muscles
A) close the atrioventricular valves.
B) close the semilunar valves.
C) prevent the atrioventricular valves from reversing into the atria.
D) eject blood from the ventricles.
E) eject blood from the atria into the ventricles. - Answers C) prevent the atrioventricular valves
from reversing into the atria.
11) Which of these is true about the atrial reflex?
A) triggered by atrial stretch receptors
B) depends on sympathetic innervation
C) also called Bainbridge reflex
D) triggered by increasing venous return
E) all of the above - Answers E) all of the above
12) ______ triggers the release of thyroid hormone, _______stimulates milk production,
____lowers calcium ion levels in the blood.
A) TRH, PRL, calcitonin.
B) TSH, PRL, calcitonin.
C) TSH, OXT, calcitriol .
D) TRH, PRL, PTH.
E) TH, OXT, cacitonin. - Answers B) TSH, PRL, calcitonin.
2025/2026
1) Which of these descriptions best matches the term B lymphocytes?
A) produce antibodies in response to antigens
B) kill bacteria using hydrogen peroxide
C) adhere to collagen beneath endothelium
D) often elevated in allergic individuals
E) coordinate immune response - Answers A) produce antibodies in response to antigens
2) Which of the following is a function of the blood?
A) transport of gases
B) transport of nutrients and wastes
C) transport of body heat
D) defense against toxins and pathogens
E) all of the above - Answers E) all of the above
3) _______controls release of glucocorticoids; _____ stimulates testosterone secretion in the
testes; ______ causes the kidneys to retain sodium.
A) CRH, luteinizing hormone, aldosterone.
B) ACTH, FSH, ADH.
C) ACTH, luteinizing hormone, aldosterone.
D) ACTH, luteinizing hormone, ADH.
E) CRH, FSH, ADH. - Answers C) ACTH, luteinizing hormone, aldosterone.
4) Hemolytic disease of the newborn may result if
A) the mother is Rh positive and the father is Rh negative.
B) both the father and the mother are Rh positive.
C) an Rh-positive mother carries an Rh-negative fetus.
D) an Rh-negative mother carries an Rh-positive fetus.
,E) both the father and the mother are Rh negative - Answers D) an Rh-negative mother carries
an Rh-positive fetus.
5) Acetylcholine slows the heart because it
A) opens potassium ion channels in SA node cells.
B) decreases the threshold.
C) opens sodium-calcium ion channels in SA node cells.
D) causes the pacemaker potential to depolarize more quickly.
E) A and C only - Answers A) opens potassium ion channels in SA node cells.
6) The chief differences between plasma and interstitial fluid involves the
A) concentration of electrolytes.
B) concentration of proteins.
C) concentration of nitrogen wastes.
D) concentration of glucose.
E) concentration of water. - Answers B) concentration of proteins.
7) Blood returning to the heart from the systemic circuit first enters the
A) right atrium.
B) conus arteriosus.
C) left atrium.
D) left ventricle.
E) right ventricle. - Answers A) right atrium.
8) The pulmonary semilunar valve prevents backward flow into the
A) pulmonary trunk.
B) pulmonary veins.
C) left atrium.
D) right ventricle.
E) aorta. - Answers D) right ventricle.
, 9) Steroid hormones
A) bind to receptors in the nucleus of their target cells.
B) are transported in the blood dissolved in the plasma.
C) remain in circulation for relatively short periods of time.
D) cannot diffuse through cell membranes.
E) are proteins. - Answers A) bind to receptors in the nucleus of their target cells.
10) Contractions of the papillary muscles
A) close the atrioventricular valves.
B) close the semilunar valves.
C) prevent the atrioventricular valves from reversing into the atria.
D) eject blood from the ventricles.
E) eject blood from the atria into the ventricles. - Answers C) prevent the atrioventricular valves
from reversing into the atria.
11) Which of these is true about the atrial reflex?
A) triggered by atrial stretch receptors
B) depends on sympathetic innervation
C) also called Bainbridge reflex
D) triggered by increasing venous return
E) all of the above - Answers E) all of the above
12) ______ triggers the release of thyroid hormone, _______stimulates milk production,
____lowers calcium ion levels in the blood.
A) TRH, PRL, calcitonin.
B) TSH, PRL, calcitonin.
C) TSH, OXT, calcitriol .
D) TRH, PRL, PTH.
E) TH, OXT, cacitonin. - Answers B) TSH, PRL, calcitonin.
