Where are most clotting factors synthesized in the body?
Spleen.
Red bone marrow.
Perivascular tissue.
Kidneys.
Liver.
The Correct Answer is E
Choice A rationale
The spleen is primarily involved in filtering blood, removing old red blood cells, and housing immune cells. While it plays a role in blood storage and immune responses, it is not a primary site for the synthesis of most clotting factors, which are complex proteins.
Choice B rationale
Red bone marrow is the primary site of hematopoiesis, the production of all blood cells, including platelets, erythrocytes, and leukocytes. However, it does not synthesize most of the plasma clotting factors; rather, it produces the cellular components involved in coagulation.
Choice C rationale
Perivascular tissue surrounds blood vessels and contains various cell types, including fibroblasts and adipocytes. While these tissues can contribute to local inflammatory responses or tissue repair, they are not major sites for the systemic synthesis of plasma clotting factors.
Choice D rationale
The kidneys play a vital role in blood filtration, waste excretion, and regulation of blood pressure and erythropoiesis (via erythropoietin). However, the kidneys do not synthesize the majority of the plasma clotting factors required for hemostasis.
Choice E rationale
The liver is the primary site for the synthesis of most plasma clotting factors, including fibrinogen, prothrombin, and factors V, VII, IX, X, and others. Hepatocytes in the liver are responsible for the complex protein synthesis required for the coagulation cascade, making it critical for hemostasis.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice B rationale
Ketoacidosis results from the excessive production of ketone bodies, which are acidic. A high protein diet, if not balanced, can lead to increased amino acid catabolism, generating more acidic byproducts. The blood's ability to buffer these acids and maintain a stable pH (normal blood pH: 7.35-7.45) is compromised, leading to metabolic acidosis.
Choice A rationale
Stabilizing fluid distribution is primarily a function of plasma proteins, particularly albumin, which contribute to colloid osmotic pressure, and the kidneys' regulation of water and electrolyte balance. While severe acidosis can affect fluid shifts, the primary compromise in ketoacidosis relates to pH balance.
Choice C rationale
Protecting against microorganisms is a function of white blood cells (leukocytes) and antibodies (immunoglobulins) present in the blood. While severe metabolic disturbances can indirectly impact immune function over time, the immediate and direct compromise in ketoacidosis is related to acid-base balance.
Choice D rationale
Transporting nutrients, such as glucose, amino acids, and lipids, is a fundamental function of blood. While metabolic imbalances due to ketoacidosis affect nutrient utilization, the core ability of blood to physically transport these substances is not the primary function compromised.
Choice E rationale
Transporting hormones is a crucial endocrine function of the blood, allowing hormones to reach their target cells. While hormonal imbalances can contribute to ketoacidosis (e.g., insulin deficiency), the direct compromise of blood's ability to transport hormones is not the central issue in ketoacidosis itself.
Correct Answer is A
Explanation
Choice A rationale
Increased viscosity directly impedes blood flow. Viscosity refers to the "thickness" or internal friction of a fluid. Higher viscosity, often due to increased hematocrit or plasma protein concentration, increases resistance to flow, requiring greater pressure to maintain the same flow rate, thus reducing velocity according to Poiseuille's Law.
Choice B rationale
Increased blood pressure provides a greater driving force for blood flow. According to Ohm's Law for fluid flow, flow rate is directly proportional to the pressure gradient. Therefore, a higher pressure propels blood through vessels more quickly, leading to an increased velocity of blood flow, assuming resistance remains constant.
Choice C rationale
Increased vessel radius significantly decreases resistance to blood flow. Resistance is inversely proportional to the fourth power of the radius (Poiseuille's Law). A larger lumen allows blood to flow with less friction against the vessel walls, thereby increasing the velocity of blood flow for a given pressure gradient.
Choice D rationale
Increased afterload refers to the resistance the ventricles must overcome to eject blood. While increased afterload initially reduces stroke volume, the body often compensates with increased contractility or heart rate. However, a sustained increase in systemic vascular resistance, a major component of afterload, can reduce the overall systemic blood flow velocity by increasing the impedance to ejection.
Choice E rationale
Decreased vasomotion implies reduced changes in vessel diameter, potentially leading to less efficient blood distribution and potentially increased overall peripheral resistance if arterioles remain constricted. Reduced vasomotion might hinder the body's ability to adjust blood flow to meet metabolic demands, potentially decreasing localized or overall blood flow velocity.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.