Question

A blow to the head may cause diabetes insipidus by ______.

1) triggering the hypersecretion of hypothalamic-inhibiting hormones
2) triggering the hyposecretion of hypothalamic-inhibiting hormones
3) interfering with the normal transmission of nerve impulses to the posterior pituitary
4) interfering with the normal transmission of nerve impulses from the posterior pituitary

Answer 1

Diabetes insipidus is caused by chronic underproduction of ADH, resulting in chronic dehydration. A blow to the head can cause diabetes insipidus by interfering with the transmission of nerve impulses to the posterior pituitary.

Step-by-step explanation:

Diabetes insipidus is characterized by chronic underproduction of ADH, leading to chronic dehydration. If the posterior pituitary does not release enough ADH, water cannot be retained by the kidneys and is lost as urine. This causes increased thirst but does not effectively decrease the solute concentration in the blood. A blow to the head may cause diabetes insipidus by interfering with the normal transmission of nerve impulses to the posterior pituitary.