NURS5003- Midterm exam preparation questions with answers tested and verified solutions al, Exams of Nursing

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What causes the rapid change in the resting

membrane potential to initiate an action potential?

Question 1 options:

Potassium gates open and potassium rushes into the cell, changing the membrane potential from negative to positive Sodium gates open and sodium rushes into the cell, changing the membrane potential from negative to positive. Sodium gates close, allowing potassium into the cell to change the membrane potential from positive to negative. Potassium gates close, allowing sodium into the cell to change the membrane potential from positive to negative. Save Question 2 (5 points)

What is a consequence of leakage of lysosomal

enzymes during chemical injury?

Question 2 options:

Enzymatic digestion of the nucleus and nucleolus occurs, halting deoxyribonucleic acid (DNA) synthesis. Influx of potassium ions into the mitochondria occurs, halting the adenosine triphosphate (ATP) production. Edema of the Golgi body occurs, preventing the transport of proteins out of the cell. Shift of calcium out of the plasma membrane occurs, destroying the cytoskeleton. Save Question 3 (5 points)

In hypoxic injury, sodium enters the cell and causes

swelling because:

Question 3 options:

The cell membrane permeability increases for sodium during periods of hypoxia. Adenosine triphosphate (ATP) is insufficient to maintain the pump that keeps sodium out of the cell. The lactic acid produced by the hypoxia binds with sodium in the cell. Sodium cannot be transported to the cell membrane during hypoxia. Save Question 4 (5 points)

What mechanisms occur in the liver cells as a result of lipid

accumulation?

Question 4 options:

Obstruction of the common bile duct, preventing the flow of bile from the liver to the gallbladder Increased synthesis of triglycerides from fatty acids and decreased synthesis of apoproteins Increased binding of lipids with apoproteins to form lipoproteins Increased conversion of fatty acids to phospholipids Save Question 5 (5 points)

Which solution is best to use when cleaning a wound

that is healing by 101. During an Immunoglobulin E

(IgE)-mediated hypersensitivity reaction, the

degranulation of mast cells is a result of which receptor

action?

Question 5 options:

Histamine bound to H Chemotactic factor binding to the receptor

Epinephrine bound to mast cells Acetylcholine bound to mast cells Save Question 6 (5 points)

What is the mechanism that results in type II hypersensitivity

reactions?

Question 6 options:

Antibodies coat mast cells by binding to receptors that signal its degranulation, followed by a discharge of preformed mediators. Antibodies bind to soluble antigens that were released into body fluids, and the immune complexes are then deposited in the tissues. Cytotoxic T (Tc) lymphocytes or lymphokine-producing helper T 1 (Th1) cells directly attack and destroy cellular targets. Antibodies bind to the antigens on the cell surface. Save Question 7 (5 points)

Type III hypersensitivity reactions are a result of which of

the following?

Question 7 options:

Antibodies coating mast cells by binding to receptors that signal its degranulation, followed by the discharge of preformed mediators Antibodies binding to soluble antigens that were released into body fluids and the immune complexes being deposited in the tissues Cytotoxic T (Tc) cells or lymphokine-producing helper T 1 (Th1) cells directly attacking and destroying cellular targets

Antibodies binding to the antigen on the cell surface Save Question 8 (5 points)

Tissue damage caused by the deposition of circulating

immune complexes containing an antibody against

the host deoxyribonucleic acid (DNA) is the cause of

which disease?

Question 8 options:

Hemolytic anemia Pernicious anemia Systemic lupus erythematosus Myasthenia gravis Save Question 9 (5 points)

Why does tissue damage occur in acute rejection after organ

transplantation?

Question 9 options:

Th1 cells release cytokines that activate infiltrating macrophages, and cytotoxic T (Tc) cells directly attack the endothelial cells of the transplanted tissue. Circulating immune complexes are deposited in the endothelial cells of transplanted tissue, where the complement cascade lyses tissue. Receptors on natural killer (NK) cells recognize antigens on the cell surface of the transplanted tissue, which releases lysosomal enzymes that destroy tissue. Antibodies coat the surface of the transplanted tissue to which mast cells bind and liberate preformed chemical mediators that destroy tissue. Save

Question 10 (5 points)

Oncogenes are genes that are capable of:

Question 10 options:

Undergoing mutation that directs the synthesis of proteins to accelerate the rate of tissue proliferation Directing synthesis of proteins to regulate growth and to provide necessary replacement of tissue Encoding proteins that negatively regulate the synthesis of proteins to slow or halt the replacement of tissue Undergoing mutation that directs malignant tissue toward blood vessels and lymph nodes for metastasis Save Question 11 (5 points)

After the baroreceptor reflex is stimulated, the

resulting impulse is transmitted from the carotid

artery by which sequence of events?

Question 11 options:

From the vagus nerve to the medulla to increase parasympathetic activity and to decrease sympathetic activity From the glossopharyngeal cranial nerve through the vagus nerve to the medulla to increase sympathetic activity and to decrease parasympathetic activity From the glossopharyngeal cranial nerve through the vagus nerve to the medulla to increase parasympathetic activity and to decrease sympathetic activity From the glossopharyngeal cranial nerve through the vagus nerve to the hypothalamus to increase parasympathetic activity and to decrease sympathetic activity Save Question 12 (5 points)

Regarding the endothelium, what is the difference

between healthy vessel walls and those that promote

clot formation?

Question 12 options:

Inflammation and roughening of the endothelium of the artery Hypertrophy and vasoconstriction of the endothelium of the artery Excessive clot formation and lipid accumulation in the endothelium of the artery Evidence of age-related changes that weaken the endothelium of the artery Save Question 13 (5 points)

What is the expected electrocardiogram (ECG) pattern

when a thrombus in a coronary artery permanently

lodges in the vessel and the infarction extends through

the myocardium from the endocardium to the

epicardium?

Question 13 options:

Prolonged QT interval ST elevation myocardial infarction (STEMI) ST depression myocardial infarction (STDMI) Non-ST elevation myocardial infarction (non-STEMI) Save Question 14 (5 points)

A patient reports sudden onset of severe chest pain that

radiates to the back and worsens with respiratory

movement and when the patient is lying down. These

clinical manifestations describe:

Question 14 options:

Myocardial infarction (MI) Pericardial effusion Restrictive pericarditis Acute pericarditis Save Question 15 (5 points)

Respirations that are characterized by alternating

periods of deep and shallow breathing are a result of

which respiratory mechanism?

Question 15 options:

Decreased blood flow to the medulla oblongata Increased partial pressure of arterial carbon dioxide (PaCO2), decreased acid-base balance (pH), and decreased partial pressure of arterial oxygen (PaO2) Stimulation of stretch or J-receptors Fatigue of the intercostal muscles and diaphragm Save Question 16 (5 points)

Which cytokines activated in childhood asthma produce

an allergic response?

Question 16 options:

IL-1, IL-2, and interferon-alpha (IFN-α) L-8, IL-12, and tumor necrosis factor–alpha (TNF-α)

IL-4, IL-10, and colony-stimulating factor (CSF) IL-4, IL-5, and IL- Save Question 17 (5 points)

Which statement accurately describes childhood

asthma? Question 17 options:

An obstructive airway disease characterized by reversible airflow obstruction, bronchial hyperreactivity, and inflammation A pulmonary disease characterized by severe hypoxemia, decreased pulmonary compliance, and diffuse densities on chest X-ray imaging A pulmonary disorder involving an abnormal expression of a protein, producing viscous mucus that lines the airways, the pancreas, the sweat ducts, and the vas deferens An obstructive airway disease characterized by atelectasis and increased pulmonary resistance as a result of a surfactant deficiency Improvement on a trial of asthma medication Save Question 18 (5 points)

Which statement best describes cystic

fibrosis? Question 18 options:

Obstructive airway disease characterized by reversible airflow obstruction, bronchial hyperreactivity, and inflammation Respiratory disease characterized by severe hypoxemia, decreased pulmonary compliance, and diffuse densities on chest X-ray imaging A pulmonary disorder involving an abnormal expression of a protein, producing viscous mucus that

obstructs the airways, the pancreas, the sweat ducts, and the vas deferens A pulmonary disorder characterized by atelectasis and increased pulmonary resistance as a result of a surfactant deficiency Save Question 19 (5 points)

What are the abnormalities in cytokines found in children

with cystic fibrosis?

Question 19 options:

A deficit of IL-1 and an excess of IL-4, IL-12, and interferon-alpha (IFN-α) A deficit of IL-6 and an excess of IL-2, IL-8, and granulocyte colony-stimulating factor (G-CSF) A deficit of IL-10 and an excess of IL-1, IL-8, and TNF-α A deficit of IL-3 and an excess of IL-14, IL-24, and colony-stimulating factor (CSF) Save Question 20 (5 points)

Examination of the throat in a child demonstrating signs

and symptoms of acute epiglottitis may contribute to

which life- threatening complication?

Question 20 options:

Retropharyngeal abscess Laryngospasms Rupturing of the tonsils Gagging induced aspiration Save

Question 21 (5 points)

Free radicals play a major role in the initiation and

progression of which diseases?

Question 21 options:

Cardiovascular diseases, such as hypertension and ischemic heart disease Renal diseases, such as acute tubular necrosis and glomerulonephritis Gastrointestinal diseases, such as peptic ulcer disease and Crohn disease Muscular diseases, such as muscular dystrophy and fibromyalgia Save Question 22 (5 points)

What is a consequence of plasma membrane damage to the

mitochondria?

Question 22 options:

Enzymatic digestion halts deoxyribonucleic acid (DNA) synthesis. Influx of calcium ions halts adenosine triphosphate (ATP) production. Edema from an influx in sodium causes a reduction in ATP production. Potassium shifts out of the mitochondria, which destroys the infrastructure. Save Question 23 (5 points)

In addition to osmosis, what force is involved in the

movement of water between the plasma and interstitial

fluid spaces?

Question 23 options:

Oncotic pressure

Buffering Net filtration Hydrostatic pressure Save Question 24 (5 points)

Venous obstruction is a cause of edema because of

an increase in which pressure?

Question 24 options:

Capillary hydrostatic Interstitial hydrostatic Capillary oncotic Interstitial oncotic Save Question 25 (5 points)

At the arterial end of capillaries, fluid moves from

the intravascular space into the interstitial space

because:

Question 25 options:

The interstitial hydrostatic pressure is higher than the capillary hydrostatic pressure. The capillary hydrostatic pressure is higher than the capillary oncotic pressure. The interstitial oncotic pressure is higher than the interstitial hydrostatic pressure.

The capillary oncotic pressure is lower than the interstitial hydrostatic pressure. Save Question 26 (5 points)

Secretion of antidiuretic hormone (ADH) and the

perception of thirst are stimulated by:

Question 26 options:

A decrease in serum sodium An increase in plasma osmolality An increase in the glomerular filtration rate A decrease in osmoreceptor stimulation Save Question 27 (5 points)

Some older adults have impaired inflammation and

wound healing because of which problem?

Question 27 options:

The circulatory system cannot adequately perfuse tissues. Complement and chemotaxis are deficient. Underlying chronic illnesses exist. The number of mast cells is insufficient. Save Question 28 (5 points)

Lead poisoning affects the nervous system by:

Question 28 options:

Interfering with the function of neurotransmitters Inhibiting the production of myelin around the nerves Increasing the resting membrane potential Altering the transport of potassium into the nerves Save Question 29 (5 points)

Carbon monoxide causes tissue damage by:

Question 29 options:

Competing with carbon dioxide so that it cannot be excreted Binding to hemoglobin so that it cannot carry oxygen Destroying the chemical bonds of hemoglobin so it cannot carry oxygen Removing iron from hemoglobin so it cannot carry oxygen Save Question 30 (5 points)

Which statement is true regarding the difference

between subdural hematoma and epidural

hematoma?

Question 30 options:

No difference exists, and these terms may be correctly used interchangeably. A subdural hematoma occurs above the dura, whereas an epidural hematoma occurs under the dura. A subdural hematoma is often the result of shaken baby syndrome, whereas an epidural hematoma rapidly forms as a result of a skull fracture.

A subdural hematoma usually forms from bleeding within the skull, such as an aneurysm eruption, whereas an epidural hematoma occurs from trauma outside the skull, such as a blunt force trauma. Save Question 31 (5 points)

What physiologic change occurs during heat

exhaustion? Question 31 options:

Hemoconcentration occurs because of the loss of salt and water. Cramping of voluntary muscles occurs as a result of salt loss. Thermoregulation fails because of high core temperatures. Subcutaneous layers are damaged because of high core temperatures. Save Question 32 (5 points)

Hemoprotein accumulations are a result of the

excessive storage of:

Question 32 options:

Iron, which is transferred from the cells to the bloodstream Hemoglobin, which is transferred from the bloodstream to the cells Albumin, which is transferred from the cells to the bloodstream Amino acids, which are transferred from the cells to the bloodstream Save Question 33 (5 points)

Hemosiderosis results in what substance being

stored in excess as hemosiderin in cells of many

organs and tissues?

Question 33 options:

Hemoglobin Ferritin Iron Transferrin Save Question 34 (5 points)

What two types of hearing loss are associated with

noise? Question 34 options:

Acoustic trauma and noise induced High frequency and low frequency High frequency and acoustic trauma Noise induced and low frequency Save Question 35 (5 points)

What type of necrosis results from ischemia of

neurons and glial cells?

Question 35 options:

Coagulative Liquefactive Caseous

Gangrene Save Question 36 (5 points)

During cell injury caused by hypoxia, sodium and water

move into the cell because:

Question 36 options:

Potassium moves out of the cell, and potassium and sodium are inversely related. The pump that transports sodium out of the cell cannot function because of a decrease in adenosine triphosphate (ATP) levels. The osmotic pressure is increased, which pulls additional sodium across the cell membrane. Oxygen is not available to bind with sodium to maintain it outside of the cell. Save Question 37 (5 points)

In decompression sickness, emboli are formed by

bubbles of: Question 37 options:

Oxygen Nitrogen Carbon monoxide Hydrogen Save Question 38 (5 points)

What is an example of compensatory hyperplasia?

Question 38 options:

Hepatic cells increase cell division after part of the liver is excised. Skeletal muscle cells atrophy as a result of paralysis. The heart muscle enlarges as a result of hypertension. The size of the uterus increases during pregnancy. Save Question 39 (5 points)

Current research has determined that chemical-

induced cellular injury:

Question 39 options:

Affects the permeability of the plasma membrane Is often the result of the damage caused by reactive free radicals Is rarely influenced by lipid peroxidation Seldom involves the cell’s organelles Save Question 40 (5 points)

What is the inflammatory effect of nitric oxide?

Question 40 options:

It increases capillary permeability and causes pain. It increases neutrophil chemotaxis and platelet aggregation. It causes smooth muscle contraction and fever.

It decreases mast cell function and decreases platelet aggregation. Save