StraighterLine Anatomy and Physiology II - Chapter 19: Blood
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Course
Straighterline A&P
Institution
Straighterline A&P
StraighterLine Anatomy and Physiology
II - Chapter 19: Blood
The only formed elements that possess a nucleus when mature are the:
a. thrombocytes
b. erythrocytes
c. leukocytes
d. platelets
e. RBCs -Answer-c. leukocytes
In the platelet release reaction,
a. factor XII is activated
b. ADP an...
StraighterLine Anatomy and Physiology II - Chapter 19: Blood The only formed elements that possess a nucleus when mature are the: a. thrombocytes b. erythrocytes c. leukocytes d. platelets e. RBCs -Answer -c. leukocytes In the platelet release reaction, a. factor XII is activated b. ADP and thromboxanes stim ulate other platelets to become activated c. activated platelets are connected by fibrinogen d. prostaglandin production is inhibited e. platelets convert to fibrin -Answer -b. ADP and thromboxanes stimulate other platelets to become activated Which of the following is NOT a form of hemoglobin found in the developing human? a. adult b. embryonic c. adolescent d. fetal -Answer -c. adolescent Healing after clot formation involves a. clot retraction. b. repair of the damaged blood vessel by connective tissue cells. c. clot dissolution. d. serum being squeezed out of the clot. e. All of these choices are correct. -Answer -e. All of these choices are correct When defective erythrocytes are broken down, a. they are removed from the blood by the lungs. b. bilirubin is formed from the breakdown of hemoglobin. c. their heme groups are converted into amino acids. d. their iron is excreted into the small intestine. e. their components cannot be recycled. -Answer -b. bilirubin is formed from the breakdown of hemoglobin The hematocrit is a. an estimate of blood flow/hour. b. the number of WBCs per mm3. c. the amount of hemoglobin by weight in the blood. d. the percentage of RBCs in a given volume of blood. e. the nu mber of RBCs in the body. -Answer -d. the percentage of RBCs in a given volume of blood When a person develops a sore throat, white blood cells are drawn to the area of infection by a process called a. chemotaxis. b. diapedesis.
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