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stylas stylas
wrote...
Posts: 9
Rep: 0 0
12 years ago
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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wrote...
Staff Member
12 years ago
One question per thread please Wink Face
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how_mendel,  star,  Sokalaw,  bio_man,  Paunewa4,  ThePsychic,  winnie_cooper,  bioani,  vsex85,  squeaky_2225,  hopsynchro,  kelseyann26,  tifftoland,  nikkilee,  awats5925,  danimarie,  jdorta1,  blueeyes,  jb24,  GABBYY13,  BLF92
- Master of Science in Biology
- Bachelor of Science
wrote...
12 years ago
Hey thanks so much for this! This is so helpful! You guys are the best!  Grinning Face
wrote...
11 years ago
I'm pretty sure these are right: (1-3 & some of 4)

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
Insulin
Glucagon
   Epinephrine
Norepinephrine
T3 (triiodothyronine)
T4 (thyroxin)
Growth hormone   Cortisol
Estradiol
Aldosterone
testosterone and vasopressin (ADH)

2. Peptide hormones are synthesized as large precursor hormones called preprohormones. The hormones (or prohormones) are stored in the rough ER and released from the cell by exocytosis. Do peptide hormones require a carrier in the blood stream? No.
3.   Catecholemines are produced in the medulla of the adrenal gland and are classified as hormones since they are derived from tyrosine. Stimulation of the chromaffin cells causes an influx of calcium ions, which causes the vesicles to merge with the plasma membrane and release the hormone by exocytosis. Are catecholemines water-soluble or lipid-soluble? Water-soluble.
4.   Thyroid hormones include two molecules called T4 (thyroxine) and T3 (triiodothyronineand). T3
wrote...
11 years ago
THANKS SO MUCH!!
wrote...
11 years ago
Please answer number 7, 8, and 10 on that same page. Thank you

7. Two examples of hormonal regulation of hormone secretion. 1) the negative feedback of T3 and T4  to decrease ----- levels: and  2) the negative feedback of cortisol which dereases both ----- and ----- levels.

8. Besides increased levels of plasma glcose and amino acides (humoral regulation), increased levels of both ----- (hormone)  and the ------ nervous system increase plasma insulin levels.
Christierobey
wrote...
Valued Member
11 years ago
Please update us with the answers Smiling Face with Open Mouth
Sunshine ☀ ☼
wrote...
11 years ago
Hi Everyone,

This is very helpful.  Can anyone help me out with the following question?  I've been trying to find it all day.

Thanks,
BIOhottie
Post Merge: 11 years ago

Haha forgot to post it.  Here it is:

TRH, GNRH, CRH etc. are known as ____________ hypothalamic hormones which regulate the function of the _________ pituitary.  These hormones are released into capillary beds and carried directly to the pituitary by the __________ ________  ________ located in the __________________.
wrote...
11 years ago Edited: 11 years ago, mysweetpixxel
biohottie: I have the same sheets in front of me. Did you find the answers to number 3 on that sheet? Or any of the others haha.
Post Merge: 11 years ago

Here they are

2. ventral, anterior, hypophyseal portal veins, located in the infunibulum.


Post Merge: 11 years ago

correction infundibulum
wrote...
11 years ago
Peptides:
vasopressin
glucagon
insulin
growth hormone
Amines:
t3
t4
epinephrine
norepinephrine
Steroids:
estradiol
cortisol
aldosterone
testosterone

#2: preprohormones; secretory vesicles; exocytosis

#3 medulla; amine; tyrosine; calcium; exocytosis; water soluble

#4 t3 & t4; tyrosine; three; less abundant; no b/c lipid soluble.
wrote...
11 years ago Edited: 11 years ago, llsalexander
This is so helpful thanks!!!
Post Merge: 11 years ago

#2 preprohormones,secretory vesicles,exocytosis,no
#3medulla,amine,tyrosine,calcium,exocytosis,watersoluble
#4 T4,T3,tyrosine,3,less,no
#5cholesterol,enzyme,pregnenolone,diffusion,do,slower,stored
#6epinephrine,norepinephrine,adrenal medulla,
#7TSH,ACTH,CRH
#8GIP,parasympathetic,
#9circadian,cortisol,thyroid(T3&T4)
#10 liver,kidneys,catecholamines,peptide hormones,thyroid hormones,steroid hormones

Post Merge: 11 years ago

This is so helpful thanks!!!
Post Merge: 11 years ago

#2 preprohormones,secretory vesicles,exocytosis,no
#3medulla,amine,tyrosine,calcium,exocytosis
,watersoluble
#4 T4,T3,tyrosine,3,less,no
#5cholesterol,enzyme,pregnenolone,diffusion,do,slower,stored
#6epinephrine,norepinephrine,adrenal medulla,
#7TSH,ACTH,CRH
#8GIP,parasympathetic,
#9circadian,cortisol,thyroid(T3&T4)
#10 liver,kidneys,catecholamines,peptide hormones,thyroid hormones,steroid hormones

wrote...
11 years ago
Thank you!
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