Target organs most often regulate the pituitary gland via
The Correct Answer is {"dropdown-group-1":"E"}
A. Antagonistic regulation: This refers to hormones with opposing effects (e.g., insulin vs glucagon), not pituitary regulation.
B. Down-regulation: Down-regulation occurs when target cells reduce receptor numbers in response to high hormone levels, not a feedback mechanism to the pituitary.
C. Positive feedback inhibition: Positive feedback is rare (e.g., oxytocin in childbirth) - most pituitary regulation occurs via negative feedback.
D. Up-regulation: Up-regulation increases receptor sensitivity but is not the primary mechanism of pituitary control.
E. Negative feedback inhibition: Most endocrine regulation occurs through negative feedback, where hormones from target organs (like thyroid hormone or cortisol) suppress pituitary hormone release.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is E
Explanation
A. It acts on the hypothalamus to decrease appetite: Appetite regulation is linked to hormones like leptin and ghrelin, not ADH.
B. It causes the release of hormones from the adrenal cortex: ACTH from the anterior pituitary does this, not ADH.
C. It causes smooth muscle contraction in the female reproductive tract: Oxytocin is responsible for uterine contractions, not ADH.
D. It causes vasodilation: ADH (vasopressin) actually causes vasoconstriction, not vasodilation.
E. It increases water retention from renal tubules: ADH acts on the collecting ducts of the kidney to promote water reabsorption, reducing urine output and conserving body water.
Correct Answer is E
Explanation
A. 1: a single heme would carry one o₂, but adult hemoglobin contains more than one heme.
B. 0: hemoglobin contains heme groups (so zero is wrong).
C. 2: fetal hemoglobin and variants still have four heme groups per tetramer; two is not correct for a full hemoglobin molecule.
D. 3: hemoglobin has four globin chains and thus four heme groups, not three.
E. 4: each hemoglobin molecule has four heme groups (one per globin chain), so it can bind up to four o₂ molecules.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.