Weegy: Angiosperms have seeds protected by ovary layers. (More)

Weegy: The endocrine system is the system of glands, each of which secretes different types of hormones directly into the bloodstream (some of which are transported along nerve tracts[citation needed]) to maintain homeostasis. [ The endocrine system is in contrast to the exocrine system, which secretes its chemicals using ducts. The word endocrine derives from the Greek words "endo" meaning inside, within, and "crinis" for secrete. The endocrine system is an information signal system like the nervous system, yet its effects and mechanism are classifiably different. The endocrine system's effects are slow to initiate, and prolonged in their response, lasting from a few hours up to weeks. The nervous system sends information very quickly, and responses are generally short lived. Hormones are substances (chemical mediators) released from endocrine tissue into the bloodstream where they travel to target tissue and generate a response. Hormones regulate various human functions, including metabolism, growth and development, tissue function, sleep, and mood. The field of study dealing with the endocrine system and its disorders is endocrinology, a branch of internal F ] User: A stimulus triggers the body to create a response that feeds back to reverse the changes caused by the original stimulus. What is this process called (More)

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Weegy: Homeostasis allows organisms to keep internal conditions relatively constant despite changes in external conditions. User: Why does the function of the hormone oxytocin in the progression of labor during childbirth illustrate a positive feedback mechanism? Because an increase in oxytocin level decreases the contractions Because an increase in oxytocin level increases the contractions Because an increase in oxytocin level has no effect on the contractions Weegy: The function of the hormone oxytocin in the progression of labor during childbirth illustrates a positive feedback mechanism: Because an increase in oxytocin level increases the contractions. User: Which factor affects the heart rate in mammals? RBC count in blood Blood type Need for oxygen (More)

Weegy: At higher concentrations, auxins stimulate production of Ethylene. (More)