Oxidative deamination takes place in the
brain
blood
liver
muscles
The Correct Answer is C
A. Brain: While amino acids are important in brain metabolism, oxidative deamination primarily occurs in the liver.
B. Blood: The blood transports nitrogenous waste, but deamination doesn’t occur here.
C. Liver: The liver is the major site of oxidative deamination, where amino acids are stripped of their amino groups, forming ammonia, which is then converted to urea.
D. Muscles: Muscles may perform transamination, but oxidative deamination is mainly hepatic.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Decreased urine volume: ADH increases water reabsorption in the collecting ducts, leading to less water in the urine and decreased urine output.
B. Decreased urine molarity: ADH leads to more concentrated (higher molarity) urine, not less.
C. Increased urine volume: ADH reduces urine volume, not increases it.
D. Increased urine salinity: ADH affects water, not salt. Salinity may change indirectly, but this is not a direct effect.
E. Increased urine acidity: Urine acidity is influenced by hydrogen ion excretion, not directly by ADH.
Correct Answer is E
Explanation
A. The gastrocolic reflex: Triggered by food entering the stomach, it stimulates mass movement in the colon.
B. The duodenocolic reflex: Triggered by chyme entering the duodenum, this reflex stimulates colon contractions.
C. Chyme filling the duodenum: This activates the duodenocolic reflex, promoting mass movement.
D. Chyme filling the stomach: This activates the gastrocolic reflex.
E. The colorectal reflex: This reflex is involved in the defecation process-it responds to rectal filling, not in initiating mass movement in the colon. It is not a trigger for mass movement.
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