25 Questions
What is the final destination of all blood entering the portal system?
Intended target cells
What is the term for the process illustrated in Figure 18.8?
Negative feedback
How many hormones does the anterior pituitary gland secrete?
6
Which of the following hormones is NOT secreted by the anterior pituitary gland?
Insulin
What is the function of the hypophyseal portal system?
Transport of hormones to target cells
What is the main function of Anti-diuretic hormone (ADH)?
Increase water absorption into the blood
Which organ is affected by the action of Anti-diuretic hormone (ADH)?
Kidneys
What is the origin of Anti-diuretic hormone (ADH)?
Hypothalamus
What would be the result of decreased Anti-diuretic hormone (ADH) production?
Increased urine production
What is the opposite function of Anti-diuretic hormone (ADH)?
Decrease water absorption into the blood
Where is prolactin synthesized and secreted?
Anterior pituitary
What type of cells produce prolactin?
Lactotrophs
Which of the following hormones is NOT produced by the anterior pituitary?
Insulin
Prolactin is produced by which part of the pituitary gland?
Anterior pituitary
What is the function of lactotrophs in the anterior pituitary?
To synthesize and secrete prolactin
What is a potential consequence of altered calcium concentrations in the body fluids?
Reduced nerve conduction velocity
Which physiologic process is affected by altered phosphate concentrations in the body fluids?
Oxidative phosphorylation
What is a potential consequence of altered calcium and phosphate concentrations in the body fluids?
Disrupted cell membrane function
What is the primary effect of altered calcium concentrations on nerve function?
Increased neuronal excitability
Which system is affected by altered calcium and phosphate concentrations in the body fluids?
Nervous system
What is the composition of TRH?
A tripeptide amide
What is the effect of TRH on the anterior pituitary?
Stimulates the secretion of TSH
What is the target of TRH stimulation?
Anterior pituitary
What is the hormone stimulated by TRH in the anterior pituitary?
TSH
What is the role of TRH in the thyroid axis?
Regulates the hypothalamic-pituitary-thyroid axis
Learn about the primary hormones secreted by the hypothalamus, including Anti-diuretic hormone (ADH), and their functions in the body. Understand how ADH increases water absorption into the blood by the kidneys. Test your knowledge of the hypothalamus and its hormonal functions.
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