Jackson-Endocrine System- Adrenal Gland Flashcards
What hormones/neurotransmitters does the adrenal medulla secrete?
catecholamines- norepinephrine and epinephrine
The adrenal cortex secretes what?
Steroid hormones
Which part of the adrenal gland is part of the autonomic nervous system?
The adrenal medulla
T/F the adrenal medulla is a modified sympathetic ganglion?
True
What are the relative percentages of epinephrine and norepinephrine released from the adrenal medulla?
80% epinephrine and 20% norepinephrine
Beta adrenergic receptors have a higher affinity to what? (NE or E)
epinephrine
Alpha adrenergic receptors have a greater affinity for
Norepinephrine
The adrenal medulla enhances the sympathetic response by releasing hormones that can release additional targets without using neural circuits. Because the endocrine single is blood-borne, the responses may last longer.
Preach
What are the three zones of the adrenal cortex from inner to outer?
Zona reticularis
Zona fasciculata
Zona glomerulosa
T/F each zone of the adrenal cortex secretes a different class of steroids?
True
Why can each zone of the adrenal cortex secrete different classes of steroid hormones?
This is due to the presence of different enzymes within the cells
What are the five major classes of steroids secreted from the adrenal cortex?
Cortisol Corticosterone Aldosterone Dehydroepiandrosterone (DHEA) Androstenedione
Secretion of the the five different adrenal cortex hormones is stimulated by what?
Adrenocorticotropic hormone from the anterior pituitary
T/F Aldosterone is a mineralocorticoid? What does it do?
True
It targets the kidney and helps control mineral levels in the body- helps with blood pressure
What zone of the adrenal cortex is responsible for the secretion of aldosterone?
Zona glomerulosa
