MCQ-1
MCQ-2
MCQ-3
Complete
Photo + complete
100
A 72-year-old man complains of abdominal discomfort. Physical examination reveals neuromuscular weakness. Laboratory studies show markedly elevated levels of serum calcium. This could be due to an elevation in the level of a polypeptide hormone synthesized and secreted by which of the following endocrine cells?
(A) Chief cells
(B) Follicular cells
(C) Oxyphil cells
(D) Parafollicular cells
(E) Parietal cells
(A) Chief cells
100
A 24-year-old skydiver suffers “adrenaline rush” when jumping from airplanes. Which of the following cells is responsible for this condition?
(A) Chromaffin cells.
(B) Follicular cells.
(C) Oxyhil cells.
(D) Ganglion cells
(E) Chief cells.
(A) Chromaffin cells.
100
Which of the following statements best describes the basophils of the adenohypophysis?
a- They are of lower percentage than acidophils.
b- They contain larger granules compared to acidophils.
c- They secrete non trophic hormones.
d- Mammotrophs are one type of the basophil.
e- They show negative results to PAS stain.
a- They are of lower percentage than acidophils.
100
-------------- is an autoimmune disorder in which antibodies stimulate follicular cells to produce thyroid hormones.
Grave's disease
100
This is a follicular cell: Structure (d) contains --------------------------
Iodinated thyroglobulin
200
The cells specialized for cortisol secretion are characterized by which of the following?
A) Characterized by many electron dense granules.
B) Under control of blood Na+ level.
C) Called spongiocytes as they appear vacuolated .
D) Arranged in anastomosing cords.
E) Poor in mitochondria.
Called spongiocytes as they appear vacuolated .
200
Which of the following statements best describes Chromaffin cells?
A) They are under the control of ACTH.
B) They contain many electron dense granules.
C) They are considered parasympathetic post ganglionic neurons.
D) They are arranged in arched cords.
E) Play an important role in Ca++ level regulation
B) They contain many electron dense granules.
200
T3 and T4 synthesis by thyrocytes involves cellular actions at which of the following cellular sites?
A) Smooth endoplasmic reticulum and microtubules.
B) Microvilli and lateral interdigitations.
C) Lysosomes and Golgi complex.
D) Rough endoplasmic reticulum and microtubules.
E) Mitochondria and lipid droplets.
C) Lysosomes and Golgi complex.
200
- ------------- are considered as modified sympathetic postganglionic neurons.
Chromaffin cells
200
This is a follicular cell: Structure (e) synthesize --------------
Thyroglobulin
300
Which of the following cells helps to support clusters of cells in the pars distalis of the anterior pituitary?
(A) Fibrous astrocytes
(B) Folliculostellate cells
(C) Pituicytes
(D) Reticuloepithelial cells
(E) Satellite cells
(B) Folliculostellate cells
300
A 40-year-old woman complains of recent changes in her bodily appearance, including upper truncal weight gain and moon face. Cells responsible for this condition are present in which of the following?
(A) Adrenal medulla
(B) Adrenal cortex, zona fasciculata
(C) Adrenal cortex, zona reticularis
(D) Pineal body
(E) Neurohypophysis
Adrenal cortex, zona fasciculata
300
The following cells are stimulated by sympathetic stimulation?
a- Pinealocytes and chief cells.
b- Chief cells and parafollicular cells.
c- Pinealocytes and chromaffin cells.
d- Oxypil cells and Pituicytes.
e- Follicular cells and chromaffin cells.
Pinealocytes and chromaffin cells.
300
----------- and --------- control calcium level in blood.
Parafollicular cells - chief cells
300
Structure 12 secretes --------------------------
secerete releasing or inhibiting factors to 1ry capillary plexus
400
Which of the following cells is expected to be relatively more abundant in the parathyroid glands of an elderly patient, compared to a younger patient?
(A) Adipocytes & oxyphil cells.
(B) Chief cells & adipocytes.
(C) Endothelial cells & chief cells.
(D) Fibroblasts & adipocytes.
(E) Macrophages & fibroblasts.
(A) Adipocytes & oxyphil cells.
400
A newborn female was discovered to have virilization (development of male characteristics) of her genitalia. This case is most likely caused by increased production of hormones by cells characterized by which of the following?
A) Presence of dense core secretory granules.
B) Arranged in arched cords.
C) Few lipid droplets and more lipofusin pigments.
D) Arranged in long cords of pale polyhedral cells.
E) Arise from neural crest cells.
Few lipid droplets and more lipofusin pigments.
400
Which of the following cells have NO receptors for pituitary trophic hormones?
A) Spongiocytes and Thyrocytes.
B) Chromffin cells and parafollicular cells.
C) Follicular cells of the ovaries.
D) Chief cells and zona reticularies cells.
E) Oxyphil cells and Zona faciculata cells
B) Chromffin cells and parafollicular cells.
400
- An endocrine cell characterized by cytoplasmic processes which end in dilatations around blood capillaries is ------------------.
Pineolocyte
400
This is a follicular cell: Mention one function for structure (g)
Synthesis of lysosomes
or
-Complete thyroglobulin synthesis and packaging into secretory vesicles
500
Chromaffin cells which secrete norepinephrine differ from that secreting epinephrine in which of the following?
a- They contain few rER and Golgi complex.
b- They are under control of pituitary hormones.
c- They are more in number.
d- They contain intensely stained electron dense core granules and peripheral halo.
e- They contain abundant lysosomes.
d- They contain intensely stained electron dense core granules and peripheral halo.
500
A 9 years old boy suffers from signs of precocious puberty. Which of the following endocrine cells dysfunction is responsible for his condition?
a- Abnormal decrease in the secretion of zona reticularis cells.
b- Abnormal decrease in the secretion of Pinealocytes.
c- Abnormal decease in the secretion of parafollicular cells.
d- Abnormal decrease in the secretion of chief cells.
e- Abnormal decrease in the secretion of chromaffin cells.
b- Abnormal decrease in the secretion of Pinealocytes.
500
Fibers of hypothalamo-hypophyseal tracts are characterized by which of the following?
A) Small in diameter.
B) Heavily myelinated.
C) Rich in secretory granules.
D) Supported by tanicytes.
E) Terminate at continuous capillaries.
C) Rich in secretory granules.
500
- Secretory vesicles in follicular cells contain -------, while endocytotic vesicles contain ------------------
thyroglobulin - iodinated thyroglobulin.
500
Structure 11 refers to ---------------------------
Supra-optic & Paraventricular nuclei