(Question)
Q: The deepest region of the adrenal cortex is the zona reticularis, which produces small amounts of a class of steroid sex hormones called what? Read this paragraph and choose the correct option from the provided answers: Hormones of the Zona Reticularis The deepest region of the adrenal cortex is the zona reticularis, which produces small amounts of a class of steroid sex hormones called androgens. During puberty and most of adulthood, androgens are produced in the gonads. The androgens produced in the zona reticularis supplement the gonadal androgens. They are produced in response to ACTH from the anterior pituitary and are converted in the tissues to testosterone or estrogens. In adult women, they may contribute to the sex drive, but their function in adult men is not well understood. In post-menopausal women, as the functions of the ovaries decline, the main source of estrogens becomes the androgens produced by the zona reticularis. Choices: - estrogen - dioxins - testosterone - androgens A:
(Answer)
androgens

(Question)
Q: How are valuable metabolites recovered? Read this paragraph and choose the correct option from the provided answers: Flame Cells of Planaria and Nephridia of Worms As multi-cellular systems evolved to have organ systems that divided the metabolic needs of the body, individual organs evolved to perform the excretory function. Planaria are flatworms that live in fresh water. Their excretory system consists of two tubules connected to a highly branched duct system. The cells in the tubules are called flame cells (or protonephridia) because they have a cluster of cilia that looks like a flickering flame when viewed under the microscope, as illustrated in Figure 41.10a. The cilia propel waste matter down the tubules and out of the body through excretory pores that open on the body surface; cilia also draw water from the interstitial fluid, allowing for filtration. Any valuable metabolites are recovered by reabsorption. Flame cells are found in flatworms, including parasitic tapeworms and free-living planaria. They also maintain the organism's osmotic balance. Choices: - replication reaction - osmosis - metabolism - reabsorption A:
(Answer)
reabsorption

(Question)
Q: Fractures, osteoarthritis, and rickets are problems of which body system? Read this paragraph and choose the correct option from the provided answers: Skeletal system problems include fractures, osteoarthritis, and rickets. Choices: - digestive system - circulatory system - cardiovascular system - skeletal system A:
(Answer)
skeletal system