ENDOCRINE SYSTEM Flashcards
The following are of ectodermal in origin EXCEPT:
A. Pineal gland
B. Adrenal cortex
C. Adrenal medulla
D. Pituitary gland
B. Adrenal cortex
Internal supporting framework of endocrine glands..
RETICULAR TISSUE
The following are TRUE statements EXCEPT:
A. The posterior wall of the Rathke’s pouch gives rise to the Pars intermedia.
B. The pituitary gland is also knowna s the epiphysis cerebri.
C. The ectodermal outpocketing of the stomodeum gives rise to the Rathke’s pouch.
D. The neurohypophysis is a downgrowth from the floor of the diencephalon.
B. The pituitary gland is also knowna s the epiphysis cerebri.
Largest subdivision of the adenohypophysis.
Pars Distalis
Basophils in the Pars Distalis secrete the following hormones EXCEPT:
A. GH
B. FSH
C. LH
D. TSH
A. GH
These cells are referred to as reserve cells.
Chromophobes
The hormone of the pars intermedia.
MSH or Melanocyte stimulating hormone
It is the most highly vascular portion of the hypophysis.
Pars tuberalis
TRUE or FALSE: The hypophyseal system is formed by the connection of capillaries in the median eminence and the capillary sinusoids in the pars intermedia.
FALSE. Pars distalis.
The superior hypophyseal arteries are branches of the following:
A. Internal Carotid and PCA
B. External carotid and PICA
C. Internal Carotid and ACA
D. External Carotid and ACA
A. Internal Carotid and PCA
The neurohypophysis is formed of unmyelinated fibers of the __________________.
Hypothalamo-hypophyseal tract
Axons in the neurohypophysis descend through the median eminence:
A. Median eminence ➡️ infundibular process ➡️ infundibular stalk
B. Infundibular process ➡️ infundibular stalk ➡️ median eminence
C. Median eminence ➡️ infundibular stalk ➡️ infundibular process
C. Median eminence ➡️ infundibular stalk ➡️ infundibular process
TRUE or FALSE: Pituicytes are considered as modified neuroglial cells.
TRUE.
Hormone synthesized in the paraventricular nuclei of the hypothalamus.
OXYTOCIN
The anti-diuretic hormone is synthesized in what specific part of the hypothalamus.
Supraoptic nuclei of the hypothalamus
The 5th pharyngeal pouch gives rise to ________ which in turn gives rise to _________.
Ultimobranchial body, parafollicular or C-cells
The lining epithelium of the follicles in the thyroid gland.
Simple cuboidal epithelium
Main function of calcitonin.
Decrease blood calcium level
Choose the correct pairing:
A. Superior parathyroid: Ventral wing of the 3rd pharyngeal pouches
B. Inferior parathyroid: Dorsal wing of the 3rd pharyngeal pouches
C. Superior parathyroid: Ventral wing of the 4th pharyngeal pouches
D. Inferior parathyroid: Dorsal wing of the 4th pharyngeal pouches.
B. Inferior parathyroid: Dorsal wing of the 3rd pharyngeal pouches
TRUE or FALSE: The principal cells of the parathyroid gland appears only at the end of the first decade of life until puberty.
FALSE. Oxyphil cells. Principal or chief cells are in constant occurrence.
Specific cells that secrete PTH or parathyroid hormone.
Principal cell
Principal secretory cells of the adrenal cortex are derived from….
Mesodermal cells in the nephrogenic ridge.
Secretory cells of the medulla re derived from…
Neural crest cells
It is probable that the outer part if the ________ produces much of the cortisol in unstressed individuals.
Zona fasciculata
