A deficiency in the production of proteins in the liver would most likely impair which function?
Carbohydrate metabolism
Immune defense
Blood clotting
Fat digestion
The Correct Answer is C
A. Carbohydrate metabolism: While the liver plays a massive role in carbohydrate metabolism (glycogenesis/gluconeogenesis), these processes rely on enzymatic reactions. While enzymes are proteins, the most immediate and critical systemic sign of hepatic protein synthesis failure is usually related to circulating plasma proteins, not the liver's internal metabolic ability.
B. Immune defense: While the liver produces some complement proteins involved in immunity, the primary defense system relies on White Blood Cells (leukocytes) produced in the bone marrow and lymphoid tissue.
C. Blood clotting: The liver is responsible for synthesizing most of the essential coagulation factors (proteins) found in the blood, including fibrinogen and prothrombin. If the liver cannot produce these proteins, the coagulation cascade fails, leading to an increased risk of bleeding.
D. Fat digestion: Fat digestion relies on bile acids. While the liver synthesizes bile, bile acids are cholesterol derivatives, not proteins.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Central nervous system:Meningitis is inflammation of the meninges - the protective membranes (dura, arachnoid, pia) that surround the brain and spinal cord, which are components of the central nervous system (CNS). Symptoms (fever, headache, neck stiffness, photophobia, altered mental status) reflect CNS involvement.
B. Enteric nervous system:The enteric nervous system is localized to the gastrointestinal tract and controls gut function; it is not the site of pathology in meningitis.
C. Autonomic nervous system:While severe CNS infection can secondarily affect autonomic functions (e.g., heart rate, blood pressure), the primary site of meningitis is the CNS meninges, not the autonomic nervous system itself.
D. Peripheral nervous system:The peripheral nervous system is composed of peripheral nerves outside the brain and spinal cord. Meningitis directly affects the CNS coverings, not the peripheral nerves (unless there are rare complications that secondarily involve peripheral nerves).
Correct Answer is A
Explanation
A. Lens:The lens is a transparent, flexible structure located behind the iris. By changing its shape (accommodation), it fine-tunes the focus of light onto the retina to allow clear vision at various distances.
B. Pupil:The pupil is simply the opening (hole) in the center of the iris that allows light to enter the eye. It does not focus light itself.
C. Iris:The iris is the colored muscle that controls the size of the pupil, regulating the amount of light entering, but not the focus.
D. Cornea:The cornea is the clear outer layer that provides the initial and strongest refraction (bending) of light. However, the lensis the structure responsible for the variable focusing adjustment required to see clearly.
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