Podcast
Questions and Answers
Which type of hormone binds to and activates receptors within cells?
Which type of hormone binds to and activates receptors within cells?
What is the second messenger released inside the cell when a water-soluble hormone binds to a membrane receptor?
What is the second messenger released inside the cell when a water-soluble hormone binds to a membrane receptor?
Which of the following factors control hormone secretion?
Which of the following factors control hormone secretion?
What type of feedback system most often regulates hormonal secretions?
What type of feedback system most often regulates hormonal secretions?
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Which gland is the major integrating link between the nervous system and endocrine system?
Which gland is the major integrating link between the nervous system and endocrine system?
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Which type of glands secrete their products into ducts?
Which type of glands secrete their products into ducts?
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Which type of hormones are made from cholesterol?
Which type of hormones are made from cholesterol?
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What is the process called when a hormone is present in excess and there is a decrease in the number of receptors?
What is the process called when a hormone is present in excess and there is a decrease in the number of receptors?
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Which class of hormones is water soluble?
Which class of hormones is water soluble?
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What is the main function of the endocrine system?
What is the main function of the endocrine system?
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Which hormone decreases blood glucose levels?
Which hormone decreases blood glucose levels?
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Which hormone increases blood glucose levels?
Which hormone increases blood glucose levels?
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Which gland is responsible for secreting mineralocorticoids?
Which gland is responsible for secreting mineralocorticoids?
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Which hormone is responsible for increasing sodium and water reabsorption and decreasing potassium reabsorption?
Which hormone is responsible for increasing sodium and water reabsorption and decreasing potassium reabsorption?
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Which organ produces gametes in females?
Which organ produces gametes in females?
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Which of the following physiological effects are caused by high concentrations of glucocorticoids during stress?
Which of the following physiological effects are caused by high concentrations of glucocorticoids during stress?
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Which of the following diseases are associated with stress?
Which of the following diseases are associated with stress?
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What is the main cause of exhaustion during stress?
What is the main cause of exhaustion during stress?
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Which of the following conditions is NOT related to stress?
Which of the following conditions is NOT related to stress?
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What is the role of interleukin-1 (IL-1) in the link between stress and immunity?
What is the role of interleukin-1 (IL-1) in the link between stress and immunity?
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Which gland is attached to the roof of the third ventricle inside the brain?
Which gland is attached to the roof of the third ventricle inside the brain?
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Which gland produces sex hormones related to the development and maintenance of male sexual characteristics?
Which gland produces sex hormones related to the development and maintenance of male sexual characteristics?
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Which gland secretes hormones related to immunity, promoting the proliferation and maturation of T cells?
Which gland secretes hormones related to immunity, promoting the proliferation and maturation of T cells?
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Which of the following tissues also secrete hormones, acting as paracrines and autocrines in most body tissues?
Which of the following tissues also secrete hormones, acting as paracrines and autocrines in most body tissues?
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What bodily changes are triggered by extreme, unusual, or long-lasting stress?
What bodily changes are triggered by extreme, unusual, or long-lasting stress?
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Which hormone is the most plentiful anterior pituitary hormone?
Which hormone is the most plentiful anterior pituitary hormone?
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What is the function of thyroid-stimulating hormone (TSH)?
What is the function of thyroid-stimulating hormone (TSH)?
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What is the function of luteinizing hormone (LH) in females?
What is the function of luteinizing hormone (LH) in females?
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What is the function of prolactin (PRL)?
What is the function of prolactin (PRL)?
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Which hormone is produced by the parafollicular cells of the thyroid gland and lowers the blood level of calcium?
Which hormone is produced by the parafollicular cells of the thyroid gland and lowers the blood level of calcium?
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Study Notes
Hormone Binding and Signaling
- Steroid hormones bind to and activate receptors within cells
- Cyclic adenosine monophosphate (cAMP) is the second messenger released inside the cell when a water-soluble hormone binds to a membrane receptor
Hormone Regulation
- Hormone secretion is controlled by negative feedback, stimulatory hormonal signals, and neural signals
- Negative feedback is the most common type of feedback system that regulates hormonal secretions
Glands and Hormones
- The hypothalamus is the major integrating link between the nervous system and endocrine system
- Exocrine glands secrete their products into ducts
- Steroid hormones are made from cholesterol
- Down-regulation is the process by which a hormone is present in excess and there is a decrease in the number of receptors
- Water-soluble hormones include peptides and proteins
Endocrine System Functions
- The main function of the endocrine system is to regulate various bodily functions, including growth and development, metabolism, and reproductive processes
- Insulin decreases blood glucose levels, while glucagon increases blood glucose levels
- The adrenal cortex is responsible for secreting mineralocorticoids
- Aldosterone is responsible for increasing sodium and water reabsorption and decreasing potassium reabsorption
Reproductive System
- The ovaries produce gametes in females
Stress and Glucocorticoids
- High concentrations of glucocorticoids during stress can cause physiological effects such as glucose release, fat mobilization, and suppression of the immune system
- Chronic stress is associated with diseases such as hypertension, diabetes, and ulcers
- Exhaustion occurs during stress due to depletion of energy stores
- Stress is not related to gigantism
- Interleukin-1 (IL-1) links stress and immunity by stimulating the immune response
Glands and Hormones (continued)
- The pineal gland is attached to the roof of the third ventricle inside the brain
- The testes produce sex hormones related to the development and maintenance of male sexual characteristics
- The thymus secretes hormones related to immunity, promoting the proliferation and maturation of T cells
- Adipose tissue, the pancreas, and the heart also secrete hormones, acting as paracrines and autocrines in most body tissues
- Extreme, unusual, or long-lasting stress can trigger bodily changes such as hypertension, atherosclerosis, and suppressed immunity
Pituitary Hormones
- The most plentiful anterior pituitary hormone is prolactin
- Thyroid-stimulating hormone (TSH) stimulates the thyroid gland to produce thyroxine
- Luteinizing hormone (LH) stimulates ovulation in females
- Prolactin (PRL) stimulates milk production in lactating females
- Calcitonin, produced by the parafollicular cells of the thyroid gland, lowers the blood level of calcium
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Description
Test your knowledge on the regulatory functions of parathyroid hormone (PTH) and its role in maintaining calcium and phosphate homeostasis. Explore how PTH affects osteoclast activity and understand the connection between blood calcium levels and the secretion of calcitonin and PTH.