Bio Ch45 Activities Quiz – Flashcards
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Which of these is the second of the three stages of cell signaling?
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transduction
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Receptors for nonsteroid hormones are located in _____.
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association with a cell's plasma membrane
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Which of these is a nonsteroid hormone?
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epinephrine and oxytocin
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How do nonsteroid hormones differ from steroid hormones?
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nonsteroid hormones act via signal transduction pathways; steroid hormones do not act via signal transduction pathways
( Since they do not enter the cell, nonsteroid hormones act via signal transduction pathways.)
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Which of these extracellular signal molecules could diffuse through a plasma membrane and bind to an intracellular receptor?
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estrogen
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The primary reason steroid hormones usually act slowly is that _____.
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they turn genes on or off and it takes time for gene products to build up or become depleted
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Steroid hormone-receptor complexes act in _____.
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the nucleus
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Which of these glands secretes releasing hormones?
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hypothalamus
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Which of these hormones are responsible for the "fight or flight" response to danger?
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epinephrine and norepinephrine
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Adrenocorticotropic hormone (ACTH) triggers the release of _____ in response to stress.
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glucocorticoids
( In response to stress, ACTH stimulates the adrenal cortex to secrete glucocorticoids.)
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_____ are the main male hormones.
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Androgens
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What hormone promotes water retention by the kidneys?
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antidiuretic hormone (ADH)
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Which hormone opposes the action of parathyroid hormone?
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calcitonin
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Which hormone stimulates hormone production by the ovaries and testes?
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luteinizing hormone (LH)
( LH stimulates hormone production by both the ovaries and testes.)
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Which hormone stimulates milk production?
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prolactin
( Prolactin, secreted by the anterior pituitary, stimulates milk production by the mammary glands.)
