APHY 102 Midterm Exam Questions and Correct
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What is a hormone and how does it act?
o :## 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.
What is a paracrine secretion?
o :## glands that secrete messenger molecules that affect nearby
cells
What is an autocrine secretion?
o :## glands that secrete messenger molecules that affect cells
that secrete substances
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What is an exocrine gland?
o :## a gland that produces and secretes substances into ducts
that lead to body surfaces; external
What is an endocrine gland?
:## A gland that secretes a substance (a hormone) into the
bloodstream, acting only on target cells; internal
Location of hypothalamus
o :## below the thalamus
Understand the role of negative feedback in control of
hormone secretions.
o :## A control mechanism in which rising level of a hormone
leads to a decrease in hormone secretion
Location of pituitary gland
o :## base of the brain in sella turcica of sphenoid bone
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Location of pineal gland
o :## brain
Location of parathyroid glands
o :## posterior surface of the thyroid gland
Location of adrenal gland
:## on top of the kidneys
Location of adrenal cortex
o :## outer portion of gland
Location of adrenal medulla
o :## inside portion of gland
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Location of pancreas
o :## behind the stomach
Location of testes
o :## scrotum
Location of ovary
o :## lower abdomen
Location of thyroid gland
o :## neck
Location of thymus
o :## behind the sternum
Describe steroid hormones.
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