The regulation of sodium
involves hypothalamic osmoreceptor detection of ion concentration
is due to specific sodium receptors in the hypothalamus
is linked to blood pressure
involves aldosterone, a hormone that increases sodium excretion in the kidneys
The Correct Answer is C
A. Involves hypothalamic osmoreceptor detection of ion concentration: Osmoreceptors detect osmolarity (solute concentration), not specifically sodium regulation.
B. Is due to specific sodium receptors in the hypothalamus: There are no specific sodium receptors; sodium regulation is largely hormonal.
C. Is linked to blood pressure: Sodium levels affect blood volume and pressure through water retention. The renin-angiotensin-aldosterone system (RAAS) helps regulate both sodium and blood pressure.
D. Involves aldosterone, a hormone that increases sodium excretion in the kidneys: Aldosterone increases sodium reabsorption, not excretion.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Nitrogen: Nitrogen is a gas and a component of proteins and nucleic acids, but it does not function as a buffer system in the body.
B. Bicarbonate: The bicarbonate buffer system is the primary buffer system in the extracellular fluid, regulating blood pH.
C. Phosphate: The phosphate buffer system operates mainly in the intracellular fluid and renal tubules.
D. Protein: Proteins, especially hemoglobin, act as buffers by binding or releasing hydrogen ions.
Correct Answer is C
Explanation
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.
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