Chapter 30 Bleeding Flashcards
1
Q
1. Which of the following components is LEAST crucial to the continuous circulation of oxygenated blood throughout the body? A) Heart B) Spleen C) Vasculature D) Fluid volume
A
Ans: B Page: 1519
2
Q
- The cardiac cycle begins with the onset of myocardial contraction and ends: A) as blood returns to the right atrium. B) as both ventricles are filling with blood. C) when the ventricles are emptied of blood. D) with the beginning of the next contraction.
A
Ans: D Page: 1520
3
Q
- Afterload is defined as the: A) pressure in the aorta against which the left ventricle must pump. B) amount of resistance to blood flow offered by the heart valves. C) amount of blood ejected from the ventricle with each contraction. D) volume of blood remaining in the ventricles following contraction.
A
Ans: A Page: 1520
4
Q
- Which of the following two factors DIRECTLY affect cardiac output? A) Preload and afterload B) Vessel size and stroke volume C) Stroke volume and pulse rate D) Blood pressure and pulse rate
A
Ans: C Page: 1520
5
Q
- Which of the following statements regarding blood flow is correct? A) Ejection fraction is the percentage of blood that the heart pumps per contraction. B) If more blood returns to the heart, stroke volume decreases and cardiac output falls. C) As more blood is pumped with each contraction, the ejection fraction increases. D) The amount of blood that returns to the atrium remains fixed from minute to minute.
A
Ans: A Page: 1520-1521
6
Q
- Hemoglobin functions by: A) dissolving in blood plasma to create the partial pressure of carbon dioxide. B) binding to oxygen that is absorbed in the lungs and transporting it to the tissues. C) absorbing hydrogen ions in the blood in order to maintain acid-base balance. D) transporting red blood cells throughout the body to ensure adequate oxygenation.
A
Ans: B Page: 1522
7
Q
- What aggregates in a clump and forms much of the foundation of a blood clot during the process of coagulation? A) Fibrin B) Calcium C) Plasmin D) Platelets
A
Ans: D Page: 1522
8
Q
- Perfusion is defined as: A) the effective exchange of oxygen and carbon dioxide within the lungs and at the cellular level. B) the circulation of blood through an organ or tissue in amounts adequate to meet the body’s demands. C) an ejection fraction that is adequate to maintain radial pulses or a systolic blood pressure of at least 90 mm Hg. D) the circulation of an adequate volume of blood to ensure uninterrupted cerebral and myocardial oxygenation.
A
Ans: B Page: 1522
9
Q
- Which of the following organs or body systems requires a constant blood supply, regardless of external factors? A) Skin B) Muscles C) Kidneys D) Gastrointestinal tract
A
Ans: C Page: 1522
10
Q
- Which of the following organs can sustain the longest period of inadequate perfusion? A) Gastrointestinal tract B) Kidneys C) Spinal cord D) Skeletal muscle
A
Ans: A Page: 1522-1523
11
Q
- An organ or tissue that is considerably colder than 98.6°F is better able to resist damage from hypoperfusion because: A) the body’s metabolic rate is slower. B) cells shrink as body temperature falls. C) hypothermia promotes oxygen metabolism. D) hypothermia protects hemoglobin molecules.
A
Ans: A Page: 1523
12
Q
- The amount of blood returned to the heart is called: A) preload. B) cardiac output. C) afterload. D) stroke volume.
A
Ans: A Page: 1520
13
Q
- External bleeding would be the MOST difficult to control in a patient with a large laceration to the _____________ and a blood pressure of ______ mm Hg. A) jugular vein, 96/62 B) brachial artery, 68/46 C) femoral vein, 114/60 D) carotid artery, 100/70
A
Ans: D Page: 1524-1525
14
Q
- Patients with internal hemorrhage will benefit MOST from: A) IV therapy. B) high-flow oxygen. C) rapid transport. D) PASG placement.
A
Ans: C Page: 1524
15
Q
- What is the approximate total blood volume of a 150-pound male? A) 4.8 L B) 5.1 L C) 6.2 L D) 6.5 L
A
Ans: A Page: 1524
16
Q
- The MOST significant factor that determines how well the body compensates for blood loss is: A) the patient’s pulse rate at the time of the injury. B) the period of time over which the blood is lost. C) whether the bleeding is internal or external. D) whether the bleeding is venous or arterial.
A
Ans: B Page: 1524
17
Q
- Venous bleeding: A) is dark red in color and usually oozes from the wound. B) is bright red in color and typically spurts from a wound. C) is more likely to clot spontaneously than arterial bleeding. D) is generally more difficult to control than arterial bleeding.
A
Ans: C Page: 1525