Endocrine and Reproductive Flashcards
Chemical substances that are released in one part of the body but regulates the activity of cells in other parts of the body. This statement is a definition of:
Enzymes
Hormones
Proteins
Antibodies
Hormones
Sometimes prolonged excessive exposure to high concentrations of hormone in the blood causes a phenomenon known as:
Diabetes
Up-regulation
Down-regulation
Cellular inhibition
Down-regulation
Which one of the following locations contains the receptors for water-soluble hormones?
On the mitochondria
On the chromosomes
On the cell plasma membrane
On the nuclear membrane
On the cell plasma membrane
Several hormones are synthesized in the hypothalamus and eventually transported to the anterior pituitary gland. Which of the following systems is responsible for this transport mechanism from the hypothalamus to the anterior pituitary gland?
Hypophyseal portal system
Feedback portal system
General circulatory system
Hepatic portal system
Hypophyseal portal system
Which type of hormone acts on neighbouring cells?
Circulating hormones
Paracrine hormones
Autocrine hormones
Both A and C
Paracrine hormones
Which of the following statement is correct with respect to the hypothalamus?
The hypothalamus is anatomically and functionally divided into two separate portions
The hypothalamus is located above the thalamus in the hypophyseal fossa
The hypothalamus is responsible for synthesizing at least nine different hormones
The hypothalamus is directly controlled by the pituitary gland
The hypothalamus is responsible for synthesizing at least nine different hormones
Which one of the following identifies the reason why the posterior pituitary gland is not actually considered an endocrine gland?
It is actually part of the neural system because of its location
Embryonically, it was an endocrine gland, but becomes nonfunctional in adulthood
It is strictly part of the neural system and has nothing to do with hormone release
It is only a hormone storage area that receives hormones from the hypothalamus for release
It is only a hormone storage area that receives hormones from the hypothalamus for release
There are several types of cells in the Pituitary Gland that are responsible for secreting hormones. Which Pituitary cell is INCORRECTLY matched with its respective hormone(s)?
Somatotrophs - hGH
Thyrotrophs – T3 and T4
Corticotrophs – ACTH
Gonadotrophs – FSH and LH
Thyrotrophs – T3 and T4
Both FSH and LH are responsible for regulating activities in males and females. Which of the following statements is TRUE?
FSH stimulates the secretion of both estrogen and progesterone
GnRH from the hypothalamus inhibits the release of FSH
LH stimulates testes to produce testosterone
LH initiates the development of ovarian follicles
LH stimulates testes to produce testosterone
Which of the following hormones is considered the “female hormone” but is also found in men?
Testosterone
Progesterone
Leutinizing hormone
Estrogen
Estrogen
Which of the following outcomes does Antidiuretic hormone (ADH) prevent?
Inflammation
Thyroid hormone release
The output of large amounts of urine
Contraction of the uterine smooth muscle
The output of large amounts of urine
Which of the following hormones directly initiates and maintains milk production by the mammary glands in females?
Prolactin
Oxytocin
Cortisol
Both A and B
Prolactin
Regarding the functions of the posterior pituitary gland, which of the following statements is TRUE?
ADH regulates the body’s water balance
The posterior pituitary gland can secrete five hormones
Progesterone stimulates milk production and milk ejection
Prolactin is the main hormone synthesized by the posterior pituitary gland
ADH regulates the body’s water balance
Which one of the following statements is TRUE in regards to oxytocin?
It exerts its most important effects during menstruation
It is released in response to positive-feedback mechanism
It stimulates and controls ovulation
It is released from the ovaries when blood pressure is unstable
It is released in response to positive-feedback mechanism
The anterior pituitary gland secretes all of the following hormones EXCEPT:
Human growth hormone
Antidiuretic hormone
Follicular Stimulating hormone
Thyroid Stimulating hormone
Antidiuretic hormone
A man has been told that he is not synthesizing enough follicle-stimulating hormone (FSH), and for this reason he may not be able to father a child. Choose the correct statement that explains this problem.
FSH stimulates estrogen secretion by ovarian cells, therefore it is not synthesized in males
The physician is wrong – a hormone made in the adenohypophysis can not influence fertility
The man must be producing progesterone, which inhibits the synthesis of FSH
FSH stimulates sperm production in the testes
FSH stimulates sperm production in the testes
If an individual’s blood content becomes increasing hyperglycemic, which of the following outcomes will occur?
Pancreatic beta cells will secrete insulin
Pancreatic alpha cells will secrete glucagon
Pancreatic beta cells will secrete glucagon
Both A and C
Pancreatic beta cells will secrete insulin
Which of the following processes is controlled by Parathyroid hormone (PTH)?
Decreases blood calcium levels in the body
Inhibits calcium reabsorption in the intestine
Stimulates reabsorption of calcium from the kidneys
Inhibits osteoclast activity causing bone deposition of calcium
Stimulates reabsorption of calcium from the kidneys
The thyroid gland is the only endocrine gland that stores its secretory product in large quantities. The hormones that get synthesized and secreted are T3 and T4. What is the significance of tyrosine during the process of thyroid hormone synthesis and secretion?
Tyrosine is a molecule that are responsible for trapping iodide ions from the blood
Tyrosine is a digestive enzymes that breaks down thyroglobin molecules
Tyrosine is a portion of the thyroglobin molecules that react with iodine molecules (I2)
Tyrosine is a hormone that elevates the secretion of T3 and T4
Tyrosine is a portion of the thyroglobin molecules that react with iodine molecules (I2)
In regards to the hormone aldosterone, which of the following statements is TRUE?
Its production is greatly influenced by ACTH
It functions to increase sodium reabsorption into the blood
It is secreted by the neurohypophysis
Its presence increases potassium concentrations in the blood
It functions to increase sodium reabsorption into the blood
Which one of the following conditions will occur after insulin overdose?
Increased urine output
Increased energy
Hypoglycemia
Hyperglycemia
Hypoglycemia
Which of the following hormones is the active form of Vitamin D?
Calcitriol
Parathyroid hormone
Androgen
Melatonin
Calcitriol
Lowered blood pressure can cause the renin-angiotensin-aldosterone pathway to stimulate cells of the kidneys. Which of the following statements is CORRECT with respect to synthesis and function of angiotensin II?
Angiotensin II is formed in the liver from Renin
Angiotensin II stimulates the adrenal cortex to secrete cortisol
Angiotensin II stimulates the contraction of smooth muscle in arterioles
Angiotensin II release is caused by increased blood pressure
Angiotensin II stimulates the contraction of smooth muscle in arterioles
Which of the following statements is FALSE regarding the thyroid gland?
Thyroid hormones, along with insulin and growth hormone, are necessary for the early development and maturation of the musculoskeletal system
Thyroid hormones inhibit the secretion of TSH by negative feedback
When thyroid hormone levels are high, basal metabolic rate is also high
T3 and T4 stimulate the secretion of TSH from the anterior pituitary gland
T3 and T4 stimulate the secretion of TSH from the anterior pituitary gland
Glucocorticoids are responsible for regulating metabolism and resistance to stress. Which of the following statements corresponds to these hormones?
Decreased rate of protein breakdown
Stimulating the synthesis of triglycerides and release of fatty acids
Inhibiting white blood cells that participate in inflammatory responses
Should not by prescribed for organ transplants since they promote immune responses
Inhibiting white blood cells that participate in inflammatory responses
Which of the following is TRUE about calcium homeostasis?
Increased PTH will lead to increased calcium concentrations in the blood
Increased calcitonin can promote the formation of calcitriol
PTH causes an increase in osteoblast activity
High calcium levels in the blood will cause bone resorption
Increased PTH will lead to increased calcium concentrations in the blood
When it becomes necessary to enlist the flight-or-flight, sympathetic response, which of the following hormones is being released during these situations?
Melatonin
Estrogen
Renin
Epinephrine
Epinephrine
Mineralocorticoid is to aldosterone as glucocorticoid is to _______________:
Oxytocin
Epinephrine
Cortisol
Melatonin
Cortisol
Androgens are found in both males and females and it is secreted from the adrenal cortex. Which of the following statements is INCORRECT with respect to androgen secretion by the adrenal gland?
Androgens secreted by males is usually significantly high
Androgens promote libido in females
Androgens can be converted into estrogen by other body tissues
Androgens can stimulate growth of axillary and pubic hair
Androgens secreted by males is usually significantly high
Insulin is a small protein hormone and synthesized by pancreatic cells. This hormone is released under which of the following conditions?
In response to physical stress
When blood glucose levels rise
When blood calcium levels rise
When glycogen is converted into glucose
When blood glucose levels rise
Which one of the following hormones increases blood glucose levels?
Insulin
Glycogen
Glucagon
Somatostatin
Glucagon
Which of the following is FALSE with respect to the action of thyroid hormones?
Regulates body temperature
Stimulates protein synthesis
Decreases basal metabolic rate
Increases the rate of oxygen consumption
Decreases basal metabolic rate
Glucocortocoids allow the body to deal appropriately with stress. They accomplish this by which of the following mechanisms?
Stimulating the pancreas to release insulin
Incorrect Response
Decreasing the heart rate, thus decreasing blood pressure
Correct Answer
Increasing blood glucose, fatty acid, and amino acid levels and enhancing blood pressure
Blocking the neurotransmitters that prepare the body for the stress responseGlucocortocoids allow the body to deal appropriately with stress. They accomplish this by which of the following mechanisms?
Stimulating the pancreas to release insulin
Incorrect Response
Decreasing the heart rate, thus decreasing blood pressure
Correct Answer
Increasing blood glucose, fatty acid, and amino acid levels and enhancing blood pressure
Blocking the neurotransmitters that prepare the body for the stress responseGlucocortocoids allow the body to deal appropriately with stress. They accomplish this by which of the following mechanisms?
Stimulating the pancreas to release insulin
Decreasing the heart rate, thus decreasing blood pressure
Increasing blood glucose, fatty acid, and amino acid levels and enhancing blood pressure
Blocking the neurotransmitters that prepare the body for the stress response
Increasing blood glucose, fatty acid, and amino acid levels and enhancing blood pressure
Which one of the following hormones regulates Potassium and Sodium concentrations?
Cortisol
Aldosterone
Progesterone
Thyroid hormones
Aldosterone
Which of the following would lead to a decrease in blood pressure?
Secretion of epinephrine or norepinephrine
Secretion of ADH
Vasodilation
An increase in blood volume
Vasodilation
All of the following mechanisms will cause an increase in blood pressure EXCEPT for:
Increased amounts of Antidiuretic hormone
Increased amounts of Atrial Natriuretic Peptide
Increased sympathetic stimulation of the heart and blood vessels
Increased amounts of Aldosterone
Increased amounts of Atrial Natriuretic Peptide
Compared to the nervous system, responses of the endocrine system:
Produces effects which last longer
Produces effects that have more targeted, narrower influence on tissues
Occur much quicker
All of the above
Produces effects which last longer
The form of circulatory shock known as hypovolemic shock is:
Any condition in which blood vessels are inadequately filled and blood can not circulate normally
Always fatal
Shock that results from large-scale loss of blood volume, or after severe vomiting or diarrhea
Only caused by large-scale loss of blood
Shock that results from large-scale loss of blood volume, or after severe vomiting or diarrhea