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Straighterline BIO 202
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Straighterline BIO 202 A&P2 FINAL EXAMWhen erythrocytes are destroyed, which of the following events occurs? - ANSWER:
The globin portion of the molecule is broken down into amino acids.
Type AB blood - ANSWER: has both A and B antigens on the red cells
In the platelet release reaction, - ANSWER: ADP and thromboxanes stimulate other
platelets to become activated.
The hematocrit is - ANSWER: d. the percentage of RBCs in a given volume of blood.
What vitamin is necessary to produce many clotting factors in the liver? - ANSWER:
Vitamin K
A white blood cell engulfing a bacterium is an example of blood functioning in -
ANSWER: a. protection.
The oxygenated form of hemoglobin is called - ANSWER: oxyhemoglobin
The only formed elements that possess a nucleus when mature are the - ANSWER: c.
leukocytes
Plasma - ANSWER: . is the liquid matrix of the blood.
An increased amount of heparin in the blood might - ANSWER: . prevent clotting
process.
On which chromosome is there a mutation that leads to sickle cell anemia? -
ANSWER: b. chromosome 11
Blood consists of a matrix of plasma and cells; blood is a subtype of ______ tissue. -
ANSWER: e. connective
The ability of white blood cells to leave the circulation and enter tissues is called -
ANSWER: b. diapedesis.
The nervous system and certain chemicals can cause the constriction of a blood
vessel. This is known as - ANSWER: b. vascular spasm
The cascade of events in the intrinsic pathway can be set into motion when _____
comes into contact with collagen. - ANSWER: factor XII
If a blood buffer is absent, what function of the blood would be compromised? -
ANSWER: regulation of pH
,What is tissue thromboplastin? - ANSWER: A compound released by damaged tissue
that initiates the extrinsic clotting pathway
A deficiency of which of the following stem cells would result in a marked increase in
the clotting time of blood? - ANSWER: megakaryoblast
Macrophages are derived from - ANSWER: monocytes
Which of the following events is one of the three main stages of coagulation? -
ANSWER: conversion of fibrinogen to fibrin
The "pacemaker" of the heart is the - ANSWER: SA node
Where is blood moving during the period of ejection? - ANSWER: Ventricles to great
vessels
The adult heart averages ___________ grams. - ANSWER: 250-300
The epicardium - ANSWER: covers the surface of the heart.
Energy for contraction of myocardial cells comes primarily from - ANSWER: aerobic
respiration in the mitochondria
What event(s) occur during the QRS complex of an ECG? - ANSWER: depolarization
of the ventricles and repolarization of the atria
The relationship between preload and stroke volume is known as - ANSWER: Starling
Law of the heart.
Cardiac muscle cells - ANSWER: are maintained by an extensive capillary network.
During the isovolumetric contraction period of the cardiac cycle, - ANSWER: AV and
semilunar valves are closed.
Pressure in the right ventricle must exceed pressure in the ____ before the right
ventricle can eject blood. - ANSWER: pulmonary trunk
In the cardiac cycle, - ANSWER: all four chambers of the heart are in diastole at the
same time.
What cardiac arrhythmia will have no QRS complex as a symptom? - ANSWER:
ventricular fibrillation
Which of the following is administered to the people suffering from myocardial
infarction following onset of symptoms? - ANSWER: Tissue plasminogen activator (t-
PA)
, Which of the following might increase the risk for cardiovascular disease? - ANSWER:
chronic stress
Aortic stenosis results from - ANSWER: a narrowed opening through the aortic valve
An incompetent pulmonary semilunar valve could result in less blood reaching the -
ANSWER: lungs
A patient has been diagnosed with mild heart disease. Tests show that some of the
coronary arteries are partially occluded. Which of the following is the best course of
action to treat the disease? - ANSWER: Angioplasty
Angina pectoris is chest pain caused by reduced - ANSWER: blood supply to cardiac
muscle.
Coronary artery disease can diminish myocardial blood flow resulting in the death of
myocardial cells. This condition is known as a myocardial - ANSWER: infarction
What abnormal heart rhythm could be caused by an elevated body temperature,
excessive sympathetic stimulation, or toxic conditions? - ANSWER: tachycardia
Which type of vessel has the greatest compliance? - ANSWER: veins
Which of the following thoracic organs is supplied by a parietal branch of the
thoracic aorta? - ANSWER: the intercostal muscles
Increased pressure in the aortic arch will activate the aortic arch reflex and cause -
ANSWER: increased parasympathetic stimulation of the heart.
According to Poiseuille's law, - ANSWER: if resistance increases, flow decreases
The vein that ascends along the medial side of the lower limb to the femoral vein is
the ____ saphenous vein and the vein that ascends along the posterior aspect of the
leg to the popliteal vein is the _____ saphenous vein. - ANSWER: great; small
If someone has a blood pressure reading of 110/70 mm Hg, their pulse pressure
would be - ANSWER: 40 mm Hg.
What is the most important means by which capillary exchange occurs? - ANSWER:
diffusion
Which of the following statements about laminar blood flow is true? - ANSWER: The
outermost layer of blood experiences the greatest resistance to flow.
In capillary exchange, which of the following statements is true? - ANSWER: Most
fluid that leaves the arterial end of a capillary reenters the venous end of a capillary.
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