Glucocorticoids readily penetrate the bloodbrain b

ATI RN

ATI RN Test Bank

Glucocorticoids readily penetrate the blood-brain barrier and have direct effects on brain metabolism. They have the following actions EXCEPT

A. decrease brain edema B. insomnia C. increased irritability D. improved ability to concentrate

Correct Answer: D

Rationale: Glucocorticoids impair concentration (not improve, E) and cause insomnia (B), irritability (C), and memory issues (D).

All the following tests are of diagnostic utility in the diagnosis of Cushing syndrome EXCEPT

A. midnight cortisol levels B. nighttime salivary cortisol levels C. glucose tolerance test D. urinary excretion of free cortisol

Correct Answer: C

Rationale: Glucose tolerance test (C) assesses diabetes, not Cushing syndrome directly; others (A, B, D, E) are diagnostic.

Acquired hypogonadotropic hypogonadism include

A. chemotherapy B. malnutrition C. cystic fibrosis D. infection (e.g., mumps)

Correct Answer: A

Rationale: Chemotherapy (A) is a common cause of acquired hypogonadotropic hypogonadism.

Many patients with Turner syndrome are recognizable at birth because of

A. loose skin folds at the nape of the neck B. cubitus valgus C. webbing of the neck D. widely spaced nipples

Correct Answer: A

Rationale: Loose skin folds (A) are a common neonatal sign of Turner syndrome.

The current criteria for the diagnosis of type 1 and type 2 DM is a fasting blood glucose that exceeds

A. 110 mg/dL B. 115 mg/dL C. 120 mg/dL D. 125 mg/dL

Correct Answer: D

Rationale: Fasting glucose >125 mg/dL (D) is the ADA criterion for diabetes diagnosis.

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