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Endocrine: biochemistry, secretion and transport of hormones
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stylas
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Hi does anyone have the answer key for the following questions? i have done them but i want to check my answers to see how well ive done.

1.   Place the following hormones into one of the three categories of hormones (peptides, amines or steroids): T4 (thyroxin), estradiol, norepinephrine, insulin, aldosterone, glucagon, cortisol, growth hormone, T3 (triiodothyronine), epinephrine, testosterone and vasopressin (ADH).
Peptides   Amines   Steroids
      

2.   Peptide hormones are synthesized as large precursor hormones called ______________.  The hormones (or prohormones) are stored in _______  ________ and released from the cell by ___________.  Do peptide hormones require a carrier in the blood stream?
3.   Catecholemines are produced in the _________ of the adrenal gland and are classified as  ___________ hormones since they are derived from ___________.  Stimulation of the chromaffin cells causes an influx of ________ ions, which causes the vesicles to merge with the plasma membrane and release the hormone by __________.  Are catecholemines water-soluble or lipid-soluble? 
4.   Thyroid hormones include two molecules called _____and ____.  T3 consists of two ________ molecules plus ___ iodine molecules and is (more or less) abundant than T4.  Are carriers required for the transport of thyroid hormones?
5.   All steroid hormones are derived from ____________, which steroid hormone is produced is determined by the _________ present in the cell.   The common precursor molecule for all steroid hormones is _______________.  Steroid hormones enter the blood stream by __________ and __________ (do or do not) require a carrier.  The rate of secretion of steroid hormones is (faster or slower) than catecholemines because steroid hormones are not ____________.
6.   Preganglionic sympathetic fibers trigger the release of  ___________ and __________ (hormones) from the ________  _______ (gland), this is an example of neural regulation of hormone secretion.
7.   Two examples of hormonal regulation of hormone secretion include: 1) the negative feedback of T3 & T4 to decrease _____ levels; and 2) the negative feedback of cortisol which decreases both ______ and _____ levels. 
8.   Besides increased levels of plasma glucose and amino acids (humoral regulation), increased levels of both  _______ (hormone) and the __________ nervous system increase plasma insulin levels.
9.   Some hormones are released in rhythmic 24 hour patterns know as _____________ rhythms.  _____________ is a hormone where stressful stimuli can override this pattern and increase the plasma hormone levels.  In contrast, _______ hormones (amine hormones) are an example where large amounts of the hormones are bound to carrier proteins in the plasma forming a large circulating reservoir.  Thus, acute changes do not produce large changes in the plasma level of this hormone.
10.   The _______ and _________ are the major organs that metabolize hormones. The type of hormone determines how fast they are metabolized.  _________ and ____________ are rapidly metabolized, while __________ and _________ take longer to metabolize.

11.   Nuclei in the ventral hypothalamus produce two hormones that are stored in the posterior pituitary.  Name the two nuclei that produce these hormones and name the two hormones, one of which is important for water balance.

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3 years ago

Hey thanks so much for this! This is so helpful! You guys are the best!  Grin



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3 years ago

Thanks so much!!! Happy:D:D:D:D:D



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3 years ago

Thanks i needed this as well!



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3 years ago

this is great....



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3 years ago

Thank you so much.



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3 years ago

Thanks



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3 years ago

This info is very helpful with my assignments



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briggy9988
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3 years ago

got these answers but need help with the rest the endocrine system.
Hormones act at specific target organs because these organs contain ______ specific for the hormones.   ans.receptors

Growth hormone, secreted by the _ gland, stimulates growth of bones and muscle by activating intermediary proteins called_.
 ans.   anterior pituitary, somatomedins

____(hormone) from the anterior pituitary stimulates secretion of cortisol from the adrenal cortex(gland). The anterior pituitary consists of _tissue. ans.    adrenal cortex, glandular



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3 years ago

thank you!



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3 years ago

thank you this was very helpful!



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3 years ago

Thank you very much!



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