Podcast
Questions and Answers
Which of the following is NOT a physiological action of parathyroid hormone (PTH)?
Which of the following is NOT a physiological action of parathyroid hormone (PTH)?
- Stimulation of phosphate reabsorption in the kidneys
- Promotion of calcium reabsorption in the kidneys
- Inhibition of osteoclast activity in bone (correct)
- Enhancement of calcitriol synthesis in the kidneys
What is the primary site of synthesis for calcitriol?
What is the primary site of synthesis for calcitriol?
- Pancreas
- Liver
- Kidneys (correct)
- Parathyroid gland
Which hormone plays a role in promoting bone resorption and increasing plasma calcium levels?
Which hormone plays a role in promoting bone resorption and increasing plasma calcium levels?
- Calcitonin
- Thyroid hormone
- Cortisol (correct)
- Insulin
What are the symptoms of hypercalcaemia?
What are the symptoms of hypercalcaemia?
In which body system does calcium play a key role in regulating hormonal secretion?
In which body system does calcium play a key role in regulating hormonal secretion?
What percentage of filtered calcium is typically reabsorbed in the kidneys?
What percentage of filtered calcium is typically reabsorbed in the kidneys?
Which cell type is responsible for secreting bone matrix on which calcium and phosphate precipitate?
Which cell type is responsible for secreting bone matrix on which calcium and phosphate precipitate?
What is the normal range of ionized calcium in the plasma?
What is the normal range of ionized calcium in the plasma?
What factors are responsible for maintaining serum calcium levels within narrow limits?
What factors are responsible for maintaining serum calcium levels within narrow limits?
During which phase of life does the rate of bone formation exceed resorption, leading to an increase in skeletal mass?
During which phase of life does the rate of bone formation exceed resorption, leading to an increase in skeletal mass?
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Study Notes
Parathyroid Hormone (PTH)
- Not a physiological action of PTH: (answer needs to be provided)
Calcitriol Synthesis
- Primary site of synthesis for calcitriol: (answer needs to be provided)
Hormone Regulation
- Hormone that promotes bone resorption and increases plasma calcium levels: PTH
- Hormone that plays a role in regulating hormonal secretion in the endocrine system: calcium
Hypercalcaemia
- Symptoms of hypercalcaemia: (answer needs to be provided)
Calcium Regulation
- Percentage of filtered calcium reabsorbed in the kidneys: (answer needs to be provided)
- Factors responsible for maintaining serum calcium levels within narrow limits: PTH, vitamin D, and calcitonin
Bone Formation
- Cell type responsible for secreting bone matrix on which calcium and phosphate precipitate: osteoblasts
Calcium Levels
- Normal range of ionized calcium in the plasma: (answer needs to be provided)
Bone Development
- Phase of life where the rate of bone formation exceeds resorption, leading to an increase in skeletal mass: growth and development (e.g. childhood, adolescence)
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