What's the difference between releasing hormones and tropic hormones?
$begingroup$
I've been reading my textbook and two terms have appeared that, after a bit of looking, I still can't seem to be able to distinguish. Here's what the textbook says (McGraw Hill Bio 12, 2011):
After receiving signals from various sensors in the body, the
hypothalamus secretes what are referred to as releasing hormones,
which often travel to the pituitary gland. The releasing hormones
stimulate the pituitary gland to secrete hormones that act on other
endocrine glands. Hormones that stimulate endocrine glands to release
other hormones are called tropic hormones. (pg. 394)
From the work I've done, it all seems to indicate that releasing hormones regulate the secretion of other hormones, and that tropic hormones target and stimulate other endocrine glands (to release hormones). And yet my textbook appears to use the terms separately later on as if they're related rather than identical (e.g.: "the pituitary gland is controlled by the hypothalamus via releasing hormones and it secretes tropic hormones" (pg. 396)). So are they identical? And if not, what distinguishes between them?
endocrinology
asked 5 hours ago
KorvexiusKorvexius
425
$endgroup$
add a comment |
$begingroup$
I've been reading my textbook and two terms have appeared that, after a bit of looking, I still can't seem to be able to distinguish. Here's what the textbook says (McGraw Hill Bio 12, 2011):
After receiving signals from various sensors in the body, the
hypothalamus secretes what are referred to as releasing hormones,
which often travel to the pituitary gland. The releasing hormones
stimulate the pituitary gland to secrete hormones that act on other
endocrine glands. Hormones that stimulate endocrine glands to release
other hormones are called tropic hormones. (pg. 394)
From the work I've done, it all seems to indicate that releasing hormones regulate the secretion of other hormones, and that tropic hormones target and stimulate other endocrine glands (to release hormones). And yet my textbook appears to use the terms separately later on as if they're related rather than identical (e.g.: "the pituitary gland is controlled by the hypothalamus via releasing hormones and it secretes tropic hormones" (pg. 396)). So are they identical? And if not, what distinguishes between them?
endocrinology
asked 5 hours ago
KorvexiusKorvexius
425
$endgroup$
add a comment |
$begingroup$
I've been reading my textbook and two terms have appeared that, after a bit of looking, I still can't seem to be able to distinguish. Here's what the textbook says (McGraw Hill Bio 12, 2011):
After receiving signals from various sensors in the body, the
hypothalamus secretes what are referred to as releasing hormones,
which often travel to the pituitary gland. The releasing hormones
stimulate the pituitary gland to secrete hormones that act on other
endocrine glands. Hormones that stimulate endocrine glands to release
other hormones are called tropic hormones. (pg. 394)
From the work I've done, it all seems to indicate that releasing hormones regulate the secretion of other hormones, and that tropic hormones target and stimulate other endocrine glands (to release hormones). And yet my textbook appears to use the terms separately later on as if they're related rather than identical (e.g.: "the pituitary gland is controlled by the hypothalamus via releasing hormones and it secretes tropic hormones" (pg. 396)). So are they identical? And if not, what distinguishes between them?
endocrinology
asked 5 hours ago
KorvexiusKorvexius
425
$endgroup$
I've been reading my textbook and two terms have appeared that, after a bit of looking, I still can't seem to be able to distinguish. Here's what the textbook says (McGraw Hill Bio 12, 2011):
After receiving signals from various sensors in the body, the
hypothalamus secretes what are referred to as releasing hormones,
which often travel to the pituitary gland. The releasing hormones
stimulate the pituitary gland to secrete hormones that act on other
endocrine glands. Hormones that stimulate endocrine glands to release
other hormones are called tropic hormones. (pg. 394)
From the work I've done, it all seems to indicate that releasing hormones regulate the secretion of other hormones, and that tropic hormones target and stimulate other endocrine glands (to release hormones). And yet my textbook appears to use the terms separately later on as if they're related rather than identical (e.g.: "the pituitary gland is controlled by the hypothalamus via releasing hormones and it secretes tropic hormones" (pg. 396)). So are they identical? And if not, what distinguishes between them?
endocrinology
endocrinology
asked 5 hours ago
KorvexiusKorvexius
425
asked 5 hours ago
KorvexiusKorvexius
425
asked 5 hours ago
KorvexiusKorvexius
425
asked 5 hours ago
KorvexiusKorvexius
425
asked 5 hours ago
KorvexiusKorvexius
425
425
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
$begingroup$
The releasing hormones could also be considered tropic hormones, and indeed they fit the definition as you noticed, but aren't usually named as such.
The special thing about the ones your textbook is specifically highlighting as releasing hormones is that they communicate from the hypothalamus to the pituitary through the hypophyseal portal system, vessels that travel directly from the hypothalamus to the anterior pituitary.
Therefore, they aren't really released into the broader circulation (they can get there, but they'd be in too low a concentration). They are easily identified in a list of hormone because they all share a naming convention where they are called "____-releasing hormone" and their primary function is to cause the pituitary to release whatever is in the "_____".
In terms of overall neuroendocrine function, the "releasing" hormones all cause release of tropic hormones, which in turn cause release of hormones that affect other tissues.
Therefore, the sequence is releasing -> tropic -> non-tropic. They could have been named something else, like "primary tropic" and "secondary tropic" but this terminology keeps them separate as "tropic hormones that cause release of other tropic hormones."
answered 3 hours ago
Bryan Krause♦Bryan Krause
19.4k23256
$endgroup$
add a comment |
Your Answer
StackExchange.ifUsing("editor", function () {
return StackExchange.using("mathjaxEditing", function () {
StackExchange.MarkdownEditor.creationCallbacks.add(function (editor, postfix) {
StackExchange.mathjaxEditing.prepareWmdForMathJax(editor, postfix, [["$", "$"], ["\\(","\\)"]]);
});
});
}, "mathjax-editing");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "375"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: false,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
noCode: true, onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fbiology.stackexchange.com%2fquestions%2f82188%2fwhats-the-difference-between-releasing-hormones-and-tropic-hormones%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
The releasing hormones could also be considered tropic hormones, and indeed they fit the definition as you noticed, but aren't usually named as such.
The special thing about the ones your textbook is specifically highlighting as releasing hormones is that they communicate from the hypothalamus to the pituitary through the hypophyseal portal system, vessels that travel directly from the hypothalamus to the anterior pituitary.
Therefore, they aren't really released into the broader circulation (they can get there, but they'd be in too low a concentration). They are easily identified in a list of hormone because they all share a naming convention where they are called "____-releasing hormone" and their primary function is to cause the pituitary to release whatever is in the "_____".
In terms of overall neuroendocrine function, the "releasing" hormones all cause release of tropic hormones, which in turn cause release of hormones that affect other tissues.
Therefore, the sequence is releasing -> tropic -> non-tropic. They could have been named something else, like "primary tropic" and "secondary tropic" but this terminology keeps them separate as "tropic hormones that cause release of other tropic hormones."
answered 3 hours ago
Bryan Krause♦Bryan Krause
19.4k23256
$endgroup$
add a comment |
$begingroup$
The releasing hormones could also be considered tropic hormones, and indeed they fit the definition as you noticed, but aren't usually named as such.
The special thing about the ones your textbook is specifically highlighting as releasing hormones is that they communicate from the hypothalamus to the pituitary through the hypophyseal portal system, vessels that travel directly from the hypothalamus to the anterior pituitary.
Therefore, they aren't really released into the broader circulation (they can get there, but they'd be in too low a concentration). They are easily identified in a list of hormone because they all share a naming convention where they are called "____-releasing hormone" and their primary function is to cause the pituitary to release whatever is in the "_____".
In terms of overall neuroendocrine function, the "releasing" hormones all cause release of tropic hormones, which in turn cause release of hormones that affect other tissues.
Therefore, the sequence is releasing -> tropic -> non-tropic. They could have been named something else, like "primary tropic" and "secondary tropic" but this terminology keeps them separate as "tropic hormones that cause release of other tropic hormones."
answered 3 hours ago
Bryan Krause♦Bryan Krause
19.4k23256
$endgroup$
add a comment |
$begingroup$
The releasing hormones could also be considered tropic hormones, and indeed they fit the definition as you noticed, but aren't usually named as such.
The special thing about the ones your textbook is specifically highlighting as releasing hormones is that they communicate from the hypothalamus to the pituitary through the hypophyseal portal system, vessels that travel directly from the hypothalamus to the anterior pituitary.
Therefore, they aren't really released into the broader circulation (they can get there, but they'd be in too low a concentration). They are easily identified in a list of hormone because they all share a naming convention where they are called "____-releasing hormone" and their primary function is to cause the pituitary to release whatever is in the "_____".
In terms of overall neuroendocrine function, the "releasing" hormones all cause release of tropic hormones, which in turn cause release of hormones that affect other tissues.
Therefore, the sequence is releasing -> tropic -> non-tropic. They could have been named something else, like "primary tropic" and "secondary tropic" but this terminology keeps them separate as "tropic hormones that cause release of other tropic hormones."
answered 3 hours ago
Bryan Krause♦Bryan Krause
19.4k23256
$endgroup$
The releasing hormones could also be considered tropic hormones, and indeed they fit the definition as you noticed, but aren't usually named as such.
The special thing about the ones your textbook is specifically highlighting as releasing hormones is that they communicate from the hypothalamus to the pituitary through the hypophyseal portal system, vessels that travel directly from the hypothalamus to the anterior pituitary.
Therefore, they aren't really released into the broader circulation (they can get there, but they'd be in too low a concentration). They are easily identified in a list of hormone because they all share a naming convention where they are called "____-releasing hormone" and their primary function is to cause the pituitary to release whatever is in the "_____".
In terms of overall neuroendocrine function, the "releasing" hormones all cause release of tropic hormones, which in turn cause release of hormones that affect other tissues.
Therefore, the sequence is releasing -> tropic -> non-tropic. They could have been named something else, like "primary tropic" and "secondary tropic" but this terminology keeps them separate as "tropic hormones that cause release of other tropic hormones."
answered 3 hours ago
Bryan Krause♦Bryan Krause
19.4k23256
answered 3 hours ago
Bryan Krause♦Bryan Krause
19.4k23256
answered 3 hours ago
Bryan Krause♦Bryan Krause
19.4k23256
answered 3 hours ago
Bryan Krause♦Bryan Krause
19.4k23256
19.4k23256
add a comment |
add a comment |
Thanks for contributing an answer to Biology Stack Exchange!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
Use MathJax to format equations. MathJax reference.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fbiology.stackexchange.com%2fquestions%2f82188%2fwhats-the-difference-between-releasing-hormones-and-tropic-hormones%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
