Target organs most often regulate the pituitary gland via
negative feedback inhibition
up-regulation
positive feedback inhibition
antagonistic regulation
down-regulation
The Correct Answer is A
A. Negative feedback inhibition: Target organs commonly regulate the pituitary gland through negative feedback. When hormone levels rise in the blood, the target organs signal the pituitary to decrease secretion of stimulating hormones, maintaining homeostasis and preventing overproduction.
B. Up-regulation: Up-regulation refers to an increase in receptor numbers on target cells in response to low hormone levels. It affects cell sensitivity but does not directly regulate pituitary hormone secretion.
C. Positive feedback inhibition: Positive feedback amplifies responses rather than inhibiting them. This mechanism is rare in endocrine systems and is typically seen only in events like childbirth, not general pituitary regulation.
D. Antagonistic regulation: Antagonistic regulation occurs when hormones have opposite effects on target cells, but this does not describe the primary mechanism by which the pituitary is controlled by its target organs.
E. Down-regulation: Down-regulation refers to the decrease in receptor numbers on target cells in response to high hormone levels. It modulates target cell sensitivity but does not directly control pituitary hormone secretion.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Two:A two-chambered heart is found in fish, consisting of one atrium and one ventricle. Humans, however, have a more complex heart structure.
B. Four:The human heart has four chambers: two atria (right and left) and two ventricles (right and left). This separation allows for efficient separation of oxygenated and deoxygenated blood, supporting systemic and pulmonary circulation.
C. Three:Three-chambered hearts are found in amphibians, with two atria and one ventricle. Humans do not have this arrangement.
D. One:A single-chambered heart exists in some primitive organisms, but it cannot support the dual circulatory system needed in mammals.
Correct Answer is ["prolactin"]
Explanation
The image illustrates the hypothalamic-pituitary-endocrine organ axis. Letter Apoints to the mammary gland (breast tissue), which is the target organ for milk production. The hormone at A is Prolactin (PRL). The hormone pathway originates from the pituitary gland. The line labeled Apoints directly to the mammary gland. The hormone responsible for stimulating milk production in the mammary glands is Prolactin (PRL), which is secreted by the anterior pituitary gland.
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.