Rickets is caused by a severe deficiency of ______

Which statement most accurately represents the feedback loop in the endocrine system?

a. A "communication system" between the hypothalamus, pituitary gland, gonads, and adrenal glands which monitors and adjusts the levels of sex hormones. b. An anomaly in some adolescents which causes pubertal development to be prolonged, and fertility to be decreased. c. A "communication system" between androgens and estrogens which determines the gender of an individual. d. A structure within the endocrine system which controls the order of hormonal and pubertal events.

Good child care

A) is rarely cost-effective. B) can serve as effective early intervention for children whose development is at risk. C) is typically funded by a local or state agency. D) is the norm in the United States.