APHY 102 Midterm Questions and Correct Answers & Latest Updated
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Course
APHY 102
Institution
APHY 102
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.
Underst...
APHY 102 Midterm Questions and Correct
Answers & Latest Updated
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.
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
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
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?
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o :## A gland that secretes a substance (a hormone) into the bloodstream, acting only on target
cells; internal
Location of hypothalamus
o :## below the thalamus
Location of pituitary gland
o :## base of the brain in sella turcica of sphenoid bone
Location of pineal gland
o :## brain
Location of parathyroid glands
o :## posterior surface of the thyroid gland
Location of thyroid gland
o :## neck
Location of thymus
o :## behind the sternum
Location of adrenal gland
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o :## on top of the kidneys
Location of adrenal cortex
o :## outer portion of gland
Location of adrenal medulla
o :## inside portion of gland
Location of pancreas
o :## behind the stomach
Location of testes
o :## scrotum
Location of ovary
o :## lower abdomen
Describe steroid hormones.
o :## poor water-solubility; can diffuse through lipid bilayer of cell membranes; cortisol,
testosterone, sex hormones; derived from cholesterol
Sequence of Steroid Hormone Action
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