In Krebs cycle, only in one step GTP is released i.e., during the conversion of succinyl CoA to
succinic acid
are molecules that are produced by endocrine glands.
Hormones
• The term (blank) implies that in response to specific stimuli, the products of those glands are released into the bloodstream.
“endocrine”
The hormones then are carried via the blood to their
target cells
derived from the modification of amino acids
Amine hormones
Typically, the original structure of the amino acid is modified such that a (blank) is removed
carboxyl group
Typically, the original structure of the amino acid is modified such that a carboxyl group is removed, whereas the (blank) remains
amine group
Amine hormones are synthesized from the amino acids
tryptophan or tyrosine
An example of a hormone derived from tryptophan is
melatonin
An example of a hormone derived from tryptophan is melatonin, which is secreted by the
pineal gland
An example of a hormone derived from tryptophan is melatonin, which is secreted by the pineal gland and helps regulate
circadian rhythm.
Tyrosine derivatives include the
thyroid hormones, catecholamines, such as epinephrine, norepinephrine, and dopamine.
are secreted by the adrenal medulla and play a role in the fight-or-flight response
Epinephrine and norepinephrine
whereas (blank) is secreted by the hypothalamus and inhibits the release of certain anterior pituitary hormones
dopamine
consist of short chains of amino acids
Peptide hormones
a pituitary hormone important in fluid balance, and atrial-natriuretic peptide, which is produced by the heart and helps to decrease blood pressure.
antidiuretic hormone
Some examples of protein hormones include
growth hormone
growth hormone, which is produced by the
pituitary gland, and follicle-stimulating hormone (FSH
growth hormone, which is produced by the pituitary gland, and follicle-stimulating hormone (FSH), which has an attached
carbohydrate group
ome examples of protein hormones include growth hormone, which is produced by the pituitary gland, and follicle-stimulating hormone (FSH), which has an attached carbohydrate group and is thus classified as a
glycoprotein