BIOL 2302 Final Exam Questions With Complete Solutions

BIOL 2302 Final Exam Questions With
Complete Solutions

. The amplification of the signal from a water-soluble hormone is achieved
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through an increase in - CORRECT ANSWER✔✔-cAMP in the cytoplasm
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Water-soluble hormones affect target cells by binding to - CORRECT
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ANSWER✔✔-plasma membrane receptors || ||




How do endocrine hormones reach their target cells? - CORRECT
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ANSWER✔✔-Hormones are transported through the blood stream to target || || || || || || || || ||


cells.


What is the role of activated protein kinases? - CORRECT ANSWER✔✔-
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Phosphorylate proteins. ||




Cyclic AMP is degraded by - CORRECT ANSWER✔✔-phosphodiesterase
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Which of the following enzymes are important in the deactivation of cAMP
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and termination of signaling? - CORRECT ANSWER✔✔-phosphodiesterase
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What type of hormones bind to receptors located on the cell membrane? -
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CORRECT ANSWER✔✔-water-soluble hormones, such as insulin and
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epinephrine

,Submit


Which intracellular substance degrades cAMP, thus inactivating the response
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to a hormone? - CORRECT ANSWER✔✔-phosphodiesterase
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Growth factor hormones, such as insulin, bind to which type of receptor? -
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CORRECT ANSWER✔✔-tyrosine kinase receptors
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Which is the correct order of events for hormones activating Gs proteins? -
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CORRECT ANSWER✔✔-activation of G protein, binding of GTP, activation of
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adenylate cyclase, conversion of ATP to cAMP
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Which second messenger causes the release of calcium from the endoplasmic
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reticulum? - CORRECT ANSWER✔✔-IP3
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Which of the following adrenergic receptors increase cAMP levels? - CORRECT
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ANSWER✔✔-β receptors
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Which of the following hormones has intracellular receptors? - CORRECT
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ANSWER✔✔-cortisol


What is the mechanism of action of lipid-soluble hormones? - CORRECT
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ANSWER✔✔-activation of genes, which increases protein synthesis in the cell || || || || || || || || ||

,After a lipid-soluble hormone is bound to its intracellular receptor, what does
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the hormone complex do? - CORRECT ANSWER✔✔-acts as a transcription
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factor and binds to DNA, activating a gene
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Which hormone's receptor is always bound to DNA, even when the receptor
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is empty? - CORRECT ANSWER✔✔-thyroid hormone
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Submit


What keeps intracellular receptors from binding to DNA before a hormone
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binds to the receptor? - CORRECT ANSWER✔✔-chaperone proteins
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(chaperonins)
Submit


What tropic hormone stimulates cortisol from the adrenal gland? - CORRECT
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ANSWER✔✔-adrenocorticotropic hormone (ACTH) || ||




What is the function of the ventral hypothalamic neurons? - CORRECT
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ANSWER✔✔-control secretion of thyroid stimulating hormone (TSH) || || || || || ||




Submit


Insulin-like growth factors (IGFs) are intermediary hormones stimulated by
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which of the following hormones? - CORRECT ANSWER✔✔-GH (growth
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hormone)


Which of the following hormones is regulated by a neuroendocrine
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("letdown") reflex? - CORRECT ANSWER✔✔-oxytocin
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, Where is antidiuretic hormone (ADH), also known as vasopressin,
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synthesized? - CORRECT ANSWER✔✔-hypothalamus || || ||




What is the most important regulatory factor controlling the circulating levels
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of thyroid hormone? - CORRECT ANSWER✔✔-negative feedback
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Your patient has been admitted to the intensive care unit with a severe head
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injury. As you monitor his urine output, you find that it has fallen sharply.
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Lab tests indicate that his serum osmolality is lower than normal (i.e., his
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plasma is too dilute). What should you suspect? - CORRECT ANSWER✔✔-
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Syndrome of inappropriate antidiuretic hormone (SIADH)
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Acromegaly may be caused by all EXCEPT which of the following? - CORRECT
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ANSWER✔✔-hyposecretion of GH in adulthood
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A blow to the head may cause diabetes insipidus by ______. - CORRECT
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ANSWER✔✔-interfering with the normal transmission of nerve impulses to || || || || || || || || ||


the posterior pituitary
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What is the target of thyroid hormones? - CORRECT ANSWER✔✔-cells of the
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body
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Where is thyrotropin-releasing hormone (TRH) made? - CORRECT
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ANSWER✔✔-hypothalamus