To prepare a patient on the unit for a bronchoscopic procedure, the medical-surgical nurse administers an IV sedative. The nurse then instructs the licensed practical nurse to:

Correct Answer: C

Rationale: After IV sedation for a bronchoscopy, monitoring vital signs like blood pressure and heart rate (C) is critical to assess sedation effects and ensure stability, a key LPN task. Education (A) is the RN's role pre-sedation, water (B) risks aspiration (NPO status), and bathroom (D) is impractical post-sedation, making C the appropriate instruction.

Correct Answer: D

Rationale: The proximal tubule reabsorbs ~65% of filtrate iso-osmotically (A), PAH concentration rises as it's secreted (B is false), and glucose/bicarbonate are mostly reabsorbed (C). A and C are true—reabsorption is iso-osmotic, nutrients are reclaimed—while B is incorrect, making D (A and C are correct) the answer.

Correct Answer: B

Rationale: Rising pCO₂ (80 mmHg) from hypoventilation lowers blood pH (acidosis) rapidly. CSF pH falls faster as CO₂ diffuses quickly across the blood-brain barrier, outpacing blood buffering (e.g., HCO₃⁻). Blood pH lags due to systemic buffers, making B correct.

Correct Answer: C

Rationale: Micturition is a sacral reflex (S2-S4) (C), contracting the detrusor (not relaxing, A) and relaxing sphincters. The external sphincter relaxes, not contracts (B), during voiding, making C the correct process description.

Correct Answer: B

Rationale: Increased capsular hydrostatic pressure (B) opposes glomerular filtration pressure, reducing GFR. Increase (A) contradicts this resistance, and no change (C) ignores the balance, making B correct.