Since H2CO3 very low, that's make it?

Question 1 of 5

Since [H2CO3] very low, that's make it?

A. Easily to estimate B. Difficult to measure C. Ineffective on the equation D. Need to replace it with other component

Correct Answer: B

Rationale: Carbonic acid ([Hâ‚‚COâ‚ƒ]) in blood is very low (~0.001 mM) and unstable, rapidly dissociating into COâ‚‚ and Hâ‚‚O, making direct measurement difficult. It's estimated via PCOâ‚‚ (0.03 Ã— PCOâ‚‚ in Henderson-Hasselbalch). It remains effective in the bicarbonate buffer equation (C is false), and no replacement is needed (D), making B correct.

Question 2 of 5

A newly graduated nurse is reviewing with their preceptor how the urinary system maintains balance of the body's fluids. What statement would warrant further education by the preceptor?

A. The glomerular filtration process serves as the initial step, in which water and electrolytes are meticulously filtered from the bloodstream into the renal tubules B. The kidneys reclaim sodium, potassium, and water, redirecting them back into the bloodstream to prevent excessive loss during tubular reabsorption C. The kidneys play a pivotal role in regulating acid-base balance by selectively excreting bicarbonate ions (HCOâ‚ƒâ») and reabsorbing hydrogen ions (Hâº) in the renal tubules D. Excess ions and substances that were not adequately filtered during the glomerular filtration phase are eliminated during tubular secretion

Correct Answer: C

Rationale: The kidneys regulate acid-base balance by excreting Hâº and reabsorbing HCOâ‚ƒâ» (opposite of C), making this statement incorrect and needing education. Filtration (A), reabsorption (B), and secretion (D) are accurate, highlighting C as the error.

Question 3 of 5

Concerning urinary concentration:

A. the thick loop of Henle generates most of the osmotic gradient needed for reabsorption of water in the collecting duct B. the tubular urine that reaches the collecting duct is generally hypotonic with respect to plasma C. in the absence of ADH, urine is not concentrated along the length of the collecting duct D. all are correct

Correct Answer: D

Rationale: The thick ascending loop creates the medullary gradient (A), urine entering the collecting duct is hypotonic post-dilution (B), and without ADH, water isn't reabsorbed, keeping urine dilute (C). All are trueâ€”gradient drives concentration, urine starts hypotonic, ADH is keyâ€”making E (all are correct), reassigned as D, correct.

Question 4 of 5

Which one of the following statements is correct with regard to net collecting duct hydrogen ion secretion.

A. it is decreased by increased renal production of ammonia B. it is increased by increased reabsorption of sodium through the apical sodium channel C. it is not affected by the presence or absence of titratable acids D. aldosterone does not modify collecting duct hydrogen ion secretion

Correct Answer: B

Rationale: Increased sodium reabsorption via apical channels (B) in the collecting duct (principal cells) enhances Hâº secretion by intercalated cells, balancing charge. Ammonia buffers Hâº (A is false), titratable acids affect it (C is false), and aldosterone boosts it (D is false), making B correct.

Question 5 of 5

What type of epithelium forms the lining of the uterine (fallopian) tube? A) stratified squamous, B) transitional, C) simple ciliated columnar, D) simple cuboidal

A. stratified squamous B. transitional C. simple ciliated columnar D. simple cuboidal

Correct Answer: C

Rationale: The fallopian tube has simple ciliated columnar epithelium (C), aiding ovum transport. Stratified squamous (A) is in skin, transitional (B) in bladder, and cuboidal (D) in tubules, making C the match.

Since [H2CO3] very low, that's make it?

Nurselytic

ATI LPN

ATI LPN

Urinary System Test Questions and Answers Questions

Question 1 of 5

Question 2 of 5

Question 3 of 5

Question 4 of 5

Question 5 of 5

Access More Questions!

ATI LPN Basic

ATI LPN Premium

Similar Questions