Histo MCQ in endocrine

موضوع: Histo MCQ in endocrine 2010-11-22, 18:08

Which of the following is NOT a characteristic of the endocrine system?
a. Products secreted into blood
b. Glands with ducts
c. Secretes hormones
d. Non localized response
e. All of the following are characteristics of the endocrine system
Answer: b
The endocrine system is a system of cellular communication. The means of communication is via hormones. The hormones are secreted by ductless glands directly into the bloodstream. Generally, the response to hormones is non localized.
If a gland secretes its product through a duct, it is an exocrine gland.
2.
What type of hormone is testosterone?
a. Protein
b. Amino acid chain
c. Steroid
d. Catecholamine
e. None of the above
Answer: c
Hormones can have a variety of structures. Hormones which are proteins include insulin and prolactin. Peptide chains are short chains of amino acids. Examples of hormones which are peptide chains are antidiuretic hormone and oxytocin. Steroid hormones are cholesterol derivatives. Steroid hormones include testosterone and estradiol. Norepinephrine and epinephrine are catecholamines.
3.
What organ is nicknamed the "master gland"
a. Adrenal medulla
b. Adrenal cortex
c. Brain
d. Pituitary
e. Heart
Answer: d
The pituitary is nicknamed the master gland.
4.
What cell type secretes ACTH?
a. Lactotropic cells
b. Thyrotropic cells
c. Somatotropic cells
d. Corticotropic cells
e. Gonadotropic cells
Answer: d
There are several cell types in the pars distalis (anterior pituitary). Lactotropic cells secrete prolactin. Thyrotropic cells secrete thyroid stimulating hormone (TSH). Somatotropic cells secrete growth hormone. Corticotropic cells secrete adrenocorticotropic hormone (ACTH) and melanocyte-stimulating hormone (MSH). Gonadotropic cells secrete follicle stimulating hormone (FSH) and luteinizing hormone (LH).
5.
Where is corpora arenacea found?
a. Pituitary
b. Pineal gland
c. Adrenal gland
d. Pancreas
e. Thyroid
Answer: b

Corpora arenacea is nicknamed "brain sand". Corpora arenacea is calcification seen in the pineal gland.

6.
Which gland secretes melatonin?
a. Pancreas
b. Thyroid
c. Pineal gland
d. Adrenal gland (cortex)
e. Adrenal gland (medulla)
Answer: c
The endocrine portion of the pancreas secretes insulin, glucagon, and somatostatin. The thyroid gland secretes the thyroid hormones (T3 and T4) and calcitonin. The pineal gland secretes melatonin. The cortex of the adrenal gland secretes a variety of corticosteroids. It secretes mineralocorticoids (such as aldosterone), glucocorticoids (such as cortisol) and sex steroids. Epinephrine and norepinephrine are secreted from the adrenal medulla.
7.
Which cell type are involved in the secretion thyroglobulin?
a. Principal cell
b. Oxyphil cell
c. Parafollicular cells
d. Follicular cells
e. Chromaffin cells
Answer: d
There are two cell types in the parathyroid gland: principal cells and oxyphil cells. Principal cells are also called chief cells. Principal cells are the more prevalent. Oxyphil cells are also found in the parathyroid gland; however they are not as prevalent as principal cells.
There are two cell types in the thyroid: follicular cells and parafollicular cells. Follicular cells release and store thyroid hormone. Parafollicular cells of the thyroid gland are also called C cells. They secrete calcitonin.
The cells of the adrenal medulla are chromaffin cells.
8.
Where is insulin secreted from?
a. Alpha cells
b. Beta cells
c. Gamma cells
d. Delta cells
e. Acini
Answer: b
The pancreas is both an endocrine and exocrine organ.
The endocrine portion of the pancreas is housed in the islets of Langerhans. Within the islets, there are several cell types. The alpha cells secrete glucagon. The beta cells secrete insulin. The delta cells secrete somatostatin. The gamma cells secrete pancreatic polypeptide.
The acini is the exocrine portion of the pancreas.
9.
Which of the following is part of the adrenal gland?
a. Chromaffin cells
b. Zona reticularis
c. Zona glomerulosa
d. Zona fasciculata
e. All of the above
Answer: e
The adrenal gland is composed of the adrenal cortex and the adrenal medulla.
The layers of the adrenal cortex, from outermost to innermost are: zona glomerulosa, zona fasciculata, and zona reticularis. The respective principle products are: mineralocorticods, glucocorticoids, and sex steroids.
The cells of the adrenal medulla are chromaffin cells. They secrete the catecholamines (epinephrine and norepinephrine).
Histology hint from Sarah Bellham: A mnemonic to remember the layers of the adrenal cortex and their respective products is "Go Find Rex; Make Good Sex" (glomerulosa, fasciculata, reticularis) (mineralocorticoid, glucocorticoid, sex steroids).
10.
Which part the adrenal gland secretes glucocorticoids?
a. Chromaffin cells
b. Zona reticularis
c. Zona glomerulosa
d. Zona fasciculata
e. None of the above
Answer: d
The adrenal gland is composed of the adrenal cortex and the adrenal medulla.
The layers of the adrenal cortex, from outermost to innermost are: zona glomerulosa, zona fasciculata, and zona reticularis. The respective principle products are: mineralocorticods, glucocorticoids, and sex steroids.
The cells of the adrenal medulla are chromaffin cells. They secrete the catecholamines (epinephrine and norepinephrine).
Histology hint from Sarah Bellham: A mnemonic to remember the layers of the adrenal cortex and their respective products is "Go Find Rex; Make Good Sex" (glomerulosa, fasciculata, reticularis) (mineralocorticoid, glucocorticoid, sex steroids).
1.
What type of hormone is insulin?
a. Protein
b. Peptide
c. Steroid
d. Catecholamine
e. None of the above
Answer: a
Hormones can have a variety of structures. Hormones which are proteins include insulin and prolactin. Peptide chains are short chains of amino acids. Examples of hormones which are peptide chains are antidiuretic hormone and oxytocin. Steroid hormones are cholesterol derivatives. Steroid hormones include testosterone and estradiol. Norepinephrine and epinephrine are catecholamines.
2.
What connects the pituitary to the hypothalamus?
a. Pars intermedia
b. Pars tuberalis
c. Infundibulum
d. Adenohypophysis
e. Neurohypophysis
Answer: c
The pituitary is nicknamed the master gland. The infundibulum connects the pituitary to the hypothalamus. The pituitary can be subdivided into the adenohypophysis and neurohypophysis. The adenohypophysis can be further sub-divided into the pars distalis, pars intermedia, and pars tuberalis. The adenohypophysis (more specifically, the pars distalis of the adenohypophysis) secretes tropic hormones. Tropic hormones affect cellular activity in their target organ. The neurohypophysis secretes two hormones: oxytocin and antidiuretic hormone.
3.
Which of the following is not part of the adenohypophysis?
a. Pars intermedia
b. Pars tuberalis
c. Pars distalis
d. Pars nervosa
e. All of the above are part of the adenohypophysis
Answer: d
The pituitary can be subdivided into the adenohypophysis and neurohypophysis. The adenohypophysis can be further sub-divided into the pars distalis, pars intermedia, and pars tuberalis. The pars distalis is the anterior lobe of the pituitary. The neurohypophysis can be further sub-divided into the pars nervosa, infundibular stalk, and median eminence. The pars nervosa is the posterior lobe.
4.
What cell type secretes prolactin?
a. Lactotropic cells
b. Thyrotropic cells
c. Somatotropic cells
d. Corticotropic cells
e. Gonadotropic cells
Answer: a
There are several cell types in the pars distalis (anterior pituitary). Lactotropic cells secrete prolactin. Thyrotropic cells secrete thyroid stimulating hormone (TSH). Somatotropic cells secrete growth hormone. Corticotropic cells secrete adrenocorticotropic hormone (ACTH) and melanocyte-stimulating hormone (MSH). Gonadotropic cells secrete follicle stimulating hormone (FSH) and luteinizing hormone (LH).
5.
Which of the following cells can be classified as an acidophil?
a. Gonadotropic cells
b. Corticotropic cells
c. Thyrotropic cells
d. Lactotropic cells
e. All of the above
Answer: d
The cells of the pars distalis (anterior pituitary) can be classified as acidophils or basophils depending on their affinity for acid or basic dyes, respectively.
The acidophils are the somatotropic cells and the lactotropic cells. Thus, growth hormone and prolactin are secreted by acidophilic cells.
The basophils are the gonadotropic cells, corticotropic cells and thyrotropic cells. Thus, the basophils secrete FSH, LH, ACTH, and TSH.
Histology hint from Sarah Bellham:
There are two mnemonics to use when thinking of acidophils and basophils of the anterior pituitary.
"GPA" (growth hormone and prolactin are secreted by the acidophils).
"B-FLAT" (basophils secrete FSH, LH, ACTH, and TSH

6.
Which gland secretes calcitonin?
a. Pancreas
b. Thyroid
c. Pineal gland
d. Adrenal gland (cortex)
e. Adrenal gland (medulla)
Answer: b
The endocrine portion of the pancreas secretes insulin, glucagon, and somatostatin. The thyroid gland secretes the thyroid hormones (T3 and T4) and calcitonin. The pineal gland secretes melatonin. The cortex of the adrenal gland secretes a variety of corticosteroids. It secretes mineralocorticoids (such as aldosterone), glucocorticoids (such as cortisol) and sex steroids. Epinephrine and norepinephrine are secreted from the adrenal medulla.
7.
Which cell type are also called C cells?
a. Principal cell
b. Oxyphil cell
c. Parafollicular cells
d. Follicular cells
e. Chromaffin cells
Answer: c
There are two cell types in the parathyroid gland: principal cells and oxyphil cells. Principal cells are also called chief cells. Principal cells are the more prevalent. Oxyphil cells are also found in the parathyroid gland; however they are not as prevalent as principal cells.
There are two cell types in the thyroid: follicular cells and parafollicular cells. Follicular cells release and store thyroid hormone. Parafollicular cells of the thyroid gland are also called C cells. They secrete calcitonin.
The cells of the adrenal medulla are chromaffin cells.
8.
Where is glucagon secreted from?
a. Alpha cells
b. Beta cells
c. Gamma cells
d. Delta cells
e. Acini
Answer: a
The pancreas is both an endocrine and exocrine organ.
The endocrine portion of the pancreas is housed in the islets of Langerhans. Within the islets, there are several cell types. The alpha cells secrete glucagon. The beta cells secrete insulin. The delta cells secrete somatostatin. The gamma cells secrete pancreatic polypeptide.
The acini is the exocrine portion of the pancreas.
9.
Which of the following is a component of the adrenal medulla?
a. Chromaffin cells
b. Zona reticularis
c. Zona glomerulosa
d. Zona fasciculata
e. All of the above
Answer: a
The adrenal gland is composed of the adrenal cortex and the adrenal medulla.
The layers of the adrenal cortex, from outermost to innermost are: zona glomerulosa, zona fasciculata, and zona reticularis. The respective principle products are: mineralocorticods, glucocorticoids, and sex steroids.
The cells of the adrenal medulla are chromaffin cells. They secrete the catecholamines (epinephrine and norepinephrine).
Histology hint from Sarah Bellham: A mnemonic to remember the layers of the adrenal cortex and their respective products is "Go Find Rex; Make Good Sex" (glomerulosa, fasciculata, reticularis) (mineralocorticoid, glucocorticoid, sex steroids).
10.
What are the cells of the pineal gland called?
a. Follicular cells
b. Parafollicular cells
c. Pinealocytes
d. P cells
e. PP cells
Answer: c
The cells of the pineal gland called pinealocytes. There are also glial cells in the pineal gland. PP cells are cells in the pancreas which secrete pancreatic polypeptide.
1.
What type of hormone is antidiuretic hormone?
a. Protein
b. Peptide
c. Steroid
d. Catecholamine
e. None of the above
Answer: b
Hormones can have a variety of structures. Hormones which are proteins include insulin and prolactin. Peptide chains are short chains of amino acids. Examples of hormones which are peptide chains are antidiuretic hormone and oxytocin. Steroid hormones are cholesterol derivatives. Steroid hormones include testosterone and estradiol. Norepinephrine and epinephrine are catecholamines.
2.
Where is oxytocin secreted from?
a. Pars intermedia
b. Pars tuberalis
c. Infundibulum
d. Adenohypophysis
e. Neurohypophysis
Answer: e
The pituitary is nicknamed the master gland. The infundibulum connects the pituitary to the hypothalamus. The pituitary can be subdivided into the adenohypophysis and neurohypophysis. The adenohypophysis can be further sub-divided into the pars distalis, pars intermedia, and pars tuberalis. The adenohypophysis (more specifically, the pars distalis of the adenohypophysis) secretes tropic hormones. Tropic hormones affect cellular activity in their target organ. The neurohypophysis secretes two hormones: oxytocin and antidiuretic hormone.
3.
What cell type secretes LH?
a. Lactotropic cells
b. Thyrotropic cells
c. Somatotropic cells
d. Corticotropic cells
e. Gonadotropic cells
Answer: e
There are several cell types in the pars distalis (anterior pituitary). Lactotropic cells secrete prolactin. Thyrotropic cells secrete thyroid stimulating hormone (TSH). Somatotropic cells secrete growth hormone. Corticotropic cells secrete adrenocorticotropic hormone (ACTH) and melanocyte-stimulating hormone (MSH). Gonadotropic cells secrete follicle stimulating hormone (FSH) and luteinizing hormone (LH).
4.
Which of the following cells can be classified as a basophil?
a. Thyrotropic cells
b. Lactotropic cells
c. Somatotropic cells
d. None of the above
e. All of the above
Answer: a
The cells of the pars distalis (anterior pituitary) can be classified as acidophils or basophils depending on their affinity for acid or basic dyes, respectively.
The acidophils are the somatotropic cells and the lactotropic cells. Thus, growth hormone and prolactin are secreted by acidophilic cells. The basophils are the gonadotropic cells, corticotropic cells and thyrotropic cells.
The basophils are the gonadotropic cells, corticotropic cells and thyrotropic cells. Thus, the basophils secrete FSH, LH, ACTH, and TSH.
Histology hint from Sarah Bellham:
There are two mnemonics to use when thinking of acidophils and basophils of the anterior pituitary.
"GPA" (growth hormone and prolactin are secreted by the acidophils).
"B-FLAT" (basophils secrete FSH, LH, ACTH, and TSH).

5.
Which gland secretes T3?
a. Pancreas
b. Thyroid
c. Pineal gland
d. Adrenal gland (cortex)
e. Adrenal gland (medulla)
Answer: b
The endocrine portion of the pancreas secretes insulin, glucagon, and somatostatin. The thyroid gland secretes the thyroid hormones (T3 and T4) and calcitonin. The pineal gland secretes melatonin. The cortex of the adrenal gland secretes a variety of corticosteroids. It secretes mineralocorticoids (such as aldosterone), glucocorticoids (such as cortisol) and sex steroids. Epinephrine and norepinephrine are secreted from the adrenal medulla.
6.
Which gland secretes sex steroids?
a. Pancreas
b. Thyroid
c. Pineal gland
d. Adrenal gland (cortex)
e. Adrenal gland (medulla)
Answer: d
The endocrine portion of the pancreas secretes insulin, glucagon, and somatostatin. The thyroid gland secretes the thyroid hormones (T3 and T4) and calcitonin. The pineal gland secretes melatonin. The cortex of the adrenal gland secretes a variety of corticosteroids. It secretes mineralocorticoids (such as aldosterone), glucocorticoids (such as cortisol) and sex steroids. Epinephrine and norepinephrine are secreted from the adrenal medulla.
7.
Which of the following is the exocrine portion of the pancreas?
a. Islets of Langerhans
b. Alpha cells
c. Beta cells
d. Delta cells
e. Acini
Answer: e
The pancreas is both an endocrine and exocrine organ.
The endocrine portion of the pancreas is housed in the islets of Langerhans. Within the islets, there are several cell types. The alpha cells secrete glucagon. The beta cells secrete insulin. The delta cells secrete somatostatin. The gamma cells secrete pancreatic polypeptide.
The acini is the exocrine portion of the pancreas.
8.
Where is somatostatin secreted from?
a. Alpha cells
b. Beta cells
c. Gamma cells
d. Delta cells
e. Acini
Answer: d
The pancreas is both an endocrine and exocrine organ.
The endocrine portion of the pancreas is housed in the islets of Langerhans. Within the islets, there are several cell types. The alpha cells secrete glucagon. The beta cells secrete insulin. The delta cells secrete somatostatin. The gamma cells secrete pancreatic polypeptide.
The acini is the exocrine portion of the pancreas.
9.
Which of the following is seen the innermost portion the adrenal gland?
a. Chromaffin cells
b. Zona reticularis
c. Zona glomerulosa
d. Zona fasciculata
e. None of the above
Answer: a
The adrenal gland is composed of the adrenal cortex and the adrenal medulla.
The layers of the adrenal cortex, from outermost to innermost are: zona glomerulosa, zona fasciculata, and zona reticularis. The respective principle products are: mineralocorticods, glucocorticoids, and sex steroids.
The cells of the adrenal medulla are chromaffin cells. They secrete the catecholamines (epinephrine and norepinephrine).
Histology hint from Sarah Bellham: A mnemonic to remember the layers of the adrenal cortex and their respective products is "Go Find Rex; Make Good Sex" (glomerulosa, fasciculata, reticularis) (mineralocorticoid, glucocorticoid, sex steroids).
10.
What cell of the parathyroid gland is also called a "chief cell"?
a. Principal cell
b. Oxyphil cell
c. Parafollicular cells
d. Follicular cells
e. Chromaffin cells
Answer: a
There are two cell types in the parathyroid gland: principal cells and oxyphil cells. Principal cells are also called chief cells. Principal cells are the more prevalent. Oxyphil cells are also found in the parathyroid gland; however they are not as prevalent as principal cells.
There are two cell types in the thyroid: follicular cells and parafollicular cells. Follicular cells release and store thyroid hormone. Parafollicular cells of the thyroid gland are also called C cells. They secrete calcitonin.
The cells of the adrenal medulla are chromaffin cells.

.
What type of hormone is epinephrine?
a. Protein
b. Amino acid chain
c. Steroid
d. Catecholamine
e. None of the above
Answer: d
Hormones can have a variety of structures. Hormones which are proteins include insulin and prolactin. Peptide chains are short chains of amino acids. Examples of hormones which are peptide chains are antidiuretic hormone and oxytocin. Steroid hormones are cholesterol derivatives. Steroid hormones include testosterone and estradiol. Norepinephrine and epinephrine are catecholamines.
2.
What is another term for the posterior lobe of the pituitary?
a. Pars intermedia
b. Pars tuberalis
c. Pars distalis
d. Pars nervosa
e. Infundibular stalk
Answer: d
The pituitary can be subdivided into the adenohypophysis and neurohypophysis. The adenohypophysis can be further sub-divided into the pars distalis, pars intermedia, and pars tuberalis. The pars distalis is the anterior lobe of the pituitary. The neurohypophysis can be further sub-divided into the pars nervosa, infundibular stalk, and median eminence. The pars nervosa is the posterior lobe.
3.
What cell type secretes TSH?
a. Lactotropic cells
b. Thyrotropic cells
c. Somatotropic cells
d. Corticotropic cells
e. Gonadotropic cells
Answer: b
There are several cell types in the pars distalis (anterior pituitary). Lactotropic cells secrete prolactin. Thyrotropic cells secrete thyroid stimulating hormone (TSH). Somatotropic cells secrete growth hormone. Corticotropic cells secrete adrenocorticotropic hormone (ACTH) and melanocyte-stimulating hormone (MSH). Gonadotropic cells secrete follicle stimulating hormone (FSH) and luteinizing hormone (LH).
4.
Which of the following cells can be classified as a basophil?
a. Corticotropic cells
b. Thyrotropic cells
c. Gonadotropic cells
d. None of the above
e. All of the above
Answer: e
The cells of the pars distalis (anterior pituitary) can be classified as acidophils or basophils depending on their affinity for acid or basic dyes, respectively.
The acidophils are the somatotropic cells and the lactotropic cells. Thus, growth hormone and prolactin are secreted by acidophilic cells.
The basophils are the gonadotropic cells, corticotropic cells and thyrotropic cells. Thus, the basophils secrete FSH, LH, ACTH, and TSH.
Histology hint from Sarah Bellham:
There are two mnemonics to use when thinking of acidophils and basophils of the anterior pituitary.
"GPA" (growth hormone and prolactin are secreted by the acidophils).
"B-FLAT" (basophils secrete FSH, LH, ACTH, and TSH).

5.
Which gland secretes insulin?
a. Pancreas
b. Thyroid
c. Pineal gland
d. Adrenal gland (cortex)
e. Adrenal gland (medulla)
Answer: a
The endocrine portion of the pancreas secretes insulin, glucagon, and somatostatin. The thyroid gland secretes the thyroid hormones (T3 and T4) and calcitonin. The pineal gland secretes melatonin. The cortex of the adrenal gland secretes a variety of corticosteroids. It secretes mineralocorticoids (such as aldosterone), glucocorticoids (such as cortisol) and sex steroids. Epinephrine and norepinephrine are secreted from the adrenal medulla.
6.
Which part the adrenal gland secretes sex steroids?
a. Chromaffin cells
b. Zona reticularis
c. Zona glomerulosa
d. Zona fasciculata
e. None of the above
Answer: b
The adrenal gland is composed of the adrenal cortex and the adrenal medulla.
The layers of the adrenal cortex, from outermost to innermost are: zona glomerulosa, zona fasciculata, and zona reticularis. The respective principle products are: mineralocorticods, glucocorticoids, and sex steroids.
The cells of the adrenal medulla are chromaffin cells. They secrete the catecholamines (epinephrine and norepinephrine).
Histology hint from Sarah Bellham: A mnemonic to remember the layers of the adrenal cortex and their respective products is "Go Find Rex; Make Good Sex" (glomerulosa, fasciculata, reticularis) (mineralocorticoid, glucocorticoid, sex steroids).
7.
What is the classification of the pancreas?
a. Mixed
b. Endocrine
c. Exocrine
d. Both endocrine and exocrine
e. None of the above
Answer: d
The pancreas is both an endocrine and exocrine organ.
8.
Where in the pancreas are islets of Langerhans most numerous?
a. Head
b. Body
c. Tail
d. Evenly distributed
e. Depends on the individual
Answer: c
Islets of Langerhans are most numerous in the tail of the pancreas.