All of the following are nonsteroid hormones except:
oxytocin
calcitonin
cortisol
glucagon
Which of the following is not a characteristic of the endocrine system?
Chemical messenger travels short distance.
Effector tissues include virtually all tissues.
Characteristics of regulatory effects are slow to appear and long-lasting.
Receptors are located on the plasma membrane or within the effector cell.
All of the following are true statements except:
there are at least 16 different prostaglandins
the first prostaglandin was identified in semen
aspirin produces some of its effects by increasing PGE synthesis
PGFs have been used to induce labor and accelerate the delivery of a baby
Endocrine glands may be made up of
glandular epithelium
neurosecretory tissue
ducts to collect interstitial fluid
both glandular epithelium and neurosecretory tissue
The many hormones secreted by endocrine tissues are structurally classified as
steroid or nonsteroid hormones
anabolic or catabolic hormones
sex or nonsex hormones
tropic or hypotropic hormones
Which of the following is a function of glucagon?
Promotes the entry of glucose into tissue cells
Tends to decrease blood glucose concentrations
Tends to increase blood glucose concentrations
Converts glucose into glycogen
Principal thyroid hormone.
T4
T3 (triiodothyronine)
thyroxine
T4 and thyroxine
The production of thyroid hormone is stimulated by another hormone from the:
anterior pituitary
posterior pituitary
thyroid gland.
parathyroid gland
The common molecule from which all steroid hormones are derived is
phospholipids
cholesterol
lecithin
triglycerols
The first step in the renin-angiotensin mechanism is:
angiotensin II circulates to the adrenal cortex, stimulating the secretion of aldosterone
renin causes angiotensinogen to be converted to angiotensin I
the juxtaglomerular apparatus secretes renin into the blood in response to a fall in the blood pressure within the kidney
aldosterone causes increased reabsorption of sodium, which causes increased water retention
Which of the following glands is not regulated by the pituitary:
Thyroid
Ovaries
Adrenals
Thymus
In comparison with the nervous system, the regulatory effects of the endocrine system are to appear, but lasting
The vascular link between the hypothalamus and adenohypophysis is called the:
hypophyseal portal system
hepatic portal system
releasing hormone portal system
both hypophyseal portal system and releasing hormone portal system
The substance that acts as a second messenger at the cellular level is:
cyclic AMP
mRNA
ATP
GTP
Which of the following hormones is not secreted by the adrenal medulla:
epinephrine
norepinephrine
adrenaline
all are secreted by adrenal medulla
target other endocrine glands and stimulate their growth and secretion
When a small amount of one hormone allows a second hormone to have its full effect, the phenomenon is called:
synergism
permissiveness
antagonism
combination
has the opposite effect of parathyroid hormone
affects milk secretion
is a Prostaglandin that plays a role in the development of a fever:
is the hormone that causes ejection of milk into the mammary ducts.
Prolactin is not a tropic hormone?
Is Steroid a structural classification of hormones?
