Question 1
What is a hormone and how does it act?
ANSWER
Hormones are chemical messengers that are responsible for regulation. They are secreted
into body fluids, mainly blood and have specific actions on target tissues.
Question 2
What is the role of negative feedback in control of hormone secretions.
ANSWER
a stimulus elicits the release of a substance; once the substance reaches a certain level, it
sends a signal that stops further release of the substance.
Question 3
Paracrine glands
ANSWER
hormones enter the interstitial fluid but affect only neighbouring cells
Question 4
Autocrine glands
ANSWER
1
,affect only the secreting cell
Question 5
endocrine glands
ANSWER
hormones are secreted from the interstitial fluid into the bloodstream and act on target
cells
Question 6
exocrine glands
ANSWER
secrete chemical substances into ducts that lead either to other organs or out of the body
Question 7
Where can the different endocrine glands be found in the body?
ANSWER
Brain:
Pineal, pituitary and hypothalamus
Neck:
Thyroid and parathyroid
Between the lungs:
Thymus
Behind the stomach:
Pancreas
2
, On top of the kidneys:
Adrenal glands
Abdomen:
Ovary
Scrotum:
Testes
Question 8
Describe steroid hormones and their mechanism of action.
ANSWER
a steroid that acts as a hormone;diffuse through the cell membrane of the target cell.
Question 9
Describe non-steroid hormones and their mechanism of action.
ANSWER
They are amino acid, peptides & protein hormones;produce their effect on target tissues
by binding to the receptors.
Question 10
How is the anterior pituitary gland different than the posterior pituitary gland?
ANSWER
the action of the anterior pituitary gland is regulated through vessels connected to the
hypothalamus whereas the action of the posterior pituitary gland is regulated through
nerves connected to the hypothalamus.
3
What is a hormone and how does it act?
ANSWER
Hormones are chemical messengers that are responsible for regulation. They are secreted
into body fluids, mainly blood and have specific actions on target tissues.
Question 2
What is the role of negative feedback in control of hormone secretions.
ANSWER
a stimulus elicits the release of a substance; once the substance reaches a certain level, it
sends a signal that stops further release of the substance.
Question 3
Paracrine glands
ANSWER
hormones enter the interstitial fluid but affect only neighbouring cells
Question 4
Autocrine glands
ANSWER
1
,affect only the secreting cell
Question 5
endocrine glands
ANSWER
hormones are secreted from the interstitial fluid into the bloodstream and act on target
cells
Question 6
exocrine glands
ANSWER
secrete chemical substances into ducts that lead either to other organs or out of the body
Question 7
Where can the different endocrine glands be found in the body?
ANSWER
Brain:
Pineal, pituitary and hypothalamus
Neck:
Thyroid and parathyroid
Between the lungs:
Thymus
Behind the stomach:
Pancreas
2
, On top of the kidneys:
Adrenal glands
Abdomen:
Ovary
Scrotum:
Testes
Question 8
Describe steroid hormones and their mechanism of action.
ANSWER
a steroid that acts as a hormone;diffuse through the cell membrane of the target cell.
Question 9
Describe non-steroid hormones and their mechanism of action.
ANSWER
They are amino acid, peptides & protein hormones;produce their effect on target tissues
by binding to the receptors.
Question 10
How is the anterior pituitary gland different than the posterior pituitary gland?
ANSWER
the action of the anterior pituitary gland is regulated through vessels connected to the
hypothalamus whereas the action of the posterior pituitary gland is regulated through
nerves connected to the hypothalamus.
3
