A patient with a spinal cord injury experiences loss of voluntary movement.
Which tissue type is primarily affected?
Nervous tissue.
Muscle tissue.
Connective tissue.
Epithelial tissue.
The Correct Answer is A
Choice A rationale
A spinal cord injury involves damage to the axons and neurons within the spinal canal. Nervous tissue is responsible for transmitting electrical impulses from the brain to the peripheral muscles. When this tissue is damaged, the "messages" for voluntary movement cannot reach their destination. Even if the muscles themselves are healthy, they remain immobile because the neural circuitry required to initiate contraction has been disrupted. Thus, the primary site of the pathology is the nervous tissue.
Choice B rationale
Muscle tissue is the effector organ that carries out the movement, but it is not the tissue primarily affected by a spinal cord injury. In the initial stages of such an injury, the muscles are structurally intact. They only begin to atrophy later due to a lack of neural stimulation, known as disuse atrophy. The paralysis is a secondary result of the loss of innervation, meaning the muscle tissue is waiting for a signal that the damaged nervous tissue can no longer provide.
Choice C rationale
Connective tissue, which includes bone, cartilage, and tendons, provides the structural framework for the body. While a fractured vertebra (bone) often causes a spinal cord injury, the connective tissue itself is not responsible for the loss of voluntary movement. The connective tissue remains capable of supporting the body's weight or connecting muscle to bone, but without the electrical input from the nervous system, the mechanical components of the musculoskeletal system cannot be activated for purposeful motion.
Choice D rationale
Epithelial tissue forms the linings of organs, the skin, and the various glands of the body. Its primary functions include protection, absorption, and secretion. While epithelial cells are present in the membranes surrounding the spinal cord (such as the arachnoid mater), they do not play a role in the conduction of motor signals. Damage to epithelial tissue would not result in the loss of voluntary muscle control or the paralysis seen following a traumatic neurological event. .
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A rationale
Glucagon levels are actually elevated in diabetic ketoacidosis, as the body perceives a state of starvation because glucose cannot enter the cells. This hormonal imbalance promotes gluconeogenesis and glycogenolysis, worsening hyperglycemia. Furthermore, the condition described is metabolic acidosis, characterized by a low pH of 7.25 and a low bicarbonate of 15 mEq/L, not alkalosis. The fruity breath and rapid Kussmaul respirations are compensatory mechanisms for high acid levels, specifically the accumulation of volatile ketoacids.
Choice B rationale
This client is experiencing severe hyperglycemia with a blood glucose of 420 mg/dL, which is the opposite of hypoglycemia. In type 1 diabetes, there is an absolute deficiency of insulin production due to the autoimmune destruction of pancreatic beta cells. Without insulin, glucose remains in the bloodstream instead of being used for energy. The symptoms of nausea, vomiting, and fruity breath are classic indicators of ketoacidosis resulting from this lack of insulin, not an overproduction of it.
Choice C rationale
In the absence of insulin, cells cannot uptake glucose for fuel, prompting the body to switch to an alternative energy source by breaking down adipose tissue. This process, known as lipolysis, releases free fatty acids that are converted by the liver into ketones, such as acetoacetate and beta-hydroxybutyrate. Ketones are acidic, leading to a drop in blood pH below the normal range of 7.35 to 7.45. The fruity odor is caused by acetone, a byproduct of this metabolic pathway.
Choice D rationale
Aldosterone is a mineralocorticoid that regulates sodium and potassium balance, but it is not the primary driver of diabetic ketoacidosis. While electrolyte imbalances occur in this condition due to osmotic diuresis, the fundamental pathophysiology is a metabolic shift caused by insulin deficiency. Sodium retention is not the cause of the fruity breath, rapid respirations, or the significant drop in bicarbonate. The focus remains on the metabolic acidosis produced by the excessive accumulation of ketones from lipid metabolism. .
Correct Answer is ["2"]
Explanation
63 Step 1 is 10 mg ÷ 5 mg.
Step 2 is 2 × 1 mL. The final calculated answer is 2 mL.
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.