APHY 102 Midterm| 185 Questions| With Complete Solutions

What is a hormone and how does it act? correct answer: Hormones are chemical messengers that are responsible for regulation. They are secreted into body fluids, mainly blood. It has specific actions on target tissues, which are any tissue that has specific receptors for that particular hormone. Understand the role of negative feedback in control of hormone secretions. correct answer: A control mechanism in which rising level of a hormone leads to a decrease in hormone secretion What is a paracrine secretion? correct answer: glands that secrete messenger molecules that affect nearby cells What is an autocrine secretion? correct answer: glands that secrete messenger molecules that affect cells that secrete substances What is an exocrine gland? correct answer: a gland that produces and secretes substances into ducts that lead to body surfaces; external What is an endocrine gland? correct answer: A gland that secretes a substance (a hormone) into the bloodstream, acting only on target cells; internal Location of hypothalamus correct answer: below the thalamus Location of pituitary gland correct answer: base of the brain in sella turcica of sphenoid bone Location of pineal gland correct answer: brain