Results and stats for "Calcium homeostasis: hormones"

Answer the questions in your head, click "Show answer", and mark yourself.

Rate this quiz

0 vote(s) cast.

Leaderboard

- 0.0s
- 57
- 1.
- Anon.
- 0.0s
- 57
- 1.
- Anon.
- 0.0s
- 57
- 1.
- Anon.
- 0.0s
- 55
- 4.
- Anon.
- 0.0s
- 53
- 5.
- Anon.
- 0.0s
- 52
- 6.
- Anon.
- 0.0s
- 50
- 7.
- Anon.
- 0.0s
- 49
- 8.
- sophie [3^rd]
- 0.0s
- 49
- 8.
- Anon.
- 0.0s
- 49
- 8.
- Anon.

How you did compared to others

Average score: 43.1
Total plays: 33

%
	Score

Comments

Related quizzes

Most correctly guessed answers

- - PTH [...]crease plasma Ca2+ levels.
  - increases
  - 69.7%
- - Vitamin D is synthesized upon exposure to [...].
  - sunlight
  - 69.7%
- - Which disease does vitamin D deficiency cause in children?
  - Rickets
  - 66.7%
- - What 3 groups are most at risk of vitamin D deficiency in the UK?
  - Infants and children in the North (expecially those born in winter and breast-fed); Asian children and women (especially vegetarians and those who expose little skin); Housebound elderly
  - 66.7%
- - In which 2 organs is vitamin D hydroxylated to activate it?
  - Liver and kidney
  - 66.7%
- - Vitamin D [...]creases Ca2+ plasma levels.
  - increases
  - 66.7%
- - Which hormone is released from the parathyroid gland in response to low plasma Ca2+ levels?
  - PTH
  - 66.7%
- - 1-alpha-hydroxylase is needed to activate vitamin [...].
  - D
  - 66.7%
- - Hypoparathyroidism leads to [...]calcaemia.
  - hypocalcaemia
  - 66.7%
- - Vitamin D [...]creases the reabsorption of Ca2+ in the kidney.
  - increases
  - 66.7%
- - What effect does oestrogen deficiency have on bone?
  - Leads to osteoporosis
  - 66.7%
- - PTH increases renal Ca2+ [...]tion.
  - increases
  - 63.6%
- - PTH is released into the blood in response to low plasma levels of which ion?
  - Ca2+
  - 63.6%
- - Hyperparathyroidism leads to [...]calcaemia.
  - hypercalcaemia
  - 63.6%
- - Calcitonin is secreted when plasma Ca2+ levels are [...].
  - high
  - 63.6%
- - Why is vitamin D not an essential vitamin?
  - Because it can be synthesized in the skin in the presence of sunlight
  - 63.6%
- - There are vitamin D receptors on osteo[...]asts.
  - osteoblasts
  - 63.6%
- - There are PTH receptors on osteo[...]asts.
  - osteoblasts
  - 60.6%
- - Do vegan diets contain vitamin D?
  - No
  - 60.6%
- - What does a person's dietary requirement of vitamin D depend on?
  - Exposure to sunshine
  - 60.6%
- - Vitamin D receptors are found on osteo[...]asts.
  - osteoblasts
  - 60.6%
- - PTH [...]creases phosphate plasma levels.
  - decreases
  - 60.6%
- - Vitamin D [...]creases phosphate plasma levels.
  - increases
  - 60.6%
- - PTH inhibits [...] synthesis in osteoblasts.
  - collagen
  - 60.6%
- - Are there PTH receptors on osteoclasts?
  - No
  - 57.6%
- - Which disease does vitamin D deficiency cause in adults?
  - Osteomalacia
  - 57.6%
- - PTH [...]creases Ca2+ and phosphate uptake from the gut.
  - increases
  - 57.6%
- - Vitamin D is [...]ed once in the liver and again in the kidney to activate it.
  - hydroxylated
  - 57.6%
- - What effect does PTH have on collagen synthesis in osteoblasts?
  - Inhibition
  - 57.6%
- - Are there vitamin D receptors on osteoblasts?
  - Yes
  - 57.6%
- - Vitamin D [...]creases the reasorption of phosphate in the kidney.
  - increases
  - 57.6%
- - Glucocorticoids [...]crease Ca2+ absorption.
  - decrease
  - 57.6%
- - Glucocorticoids [...]crease Ca2+ excretion.
  - increase
  - 57.6%
- - Are there PTH receptors on osteoblasts?
  - Yes
  - 54.5%
- - Can Ca2+ levels be effectively controlled in the absence of calcitonin?
  - Yes
  - 54.5%
- - Thyroid hormone [...]crease bone resorption.
  - increases
  - 54.5%
- - Calcitonin [...]creases osteoclast activity.
  - decreases
  - 51.5%
- - Calcitonin [...]creases plasma Ca2+ levels.
  - decreases
  - 51.5%
- - Through which mechanism does vitamin D promote transcription?
  - Steroid hormone (transported to DNA)
  - 51.5%
- - Calcitonin [...]creases plasma phosphate levels.
  - decreases
  - 51.5%
- - Which 2° messenger is involved in the activation of PTH secretion in response to low Ca2+ levels?
  - cAMP
  - 51.5%
- - Which 2° messenger is involved in inhibiting osteoblast collagen synthesis in response to PTH?
  - cAMP
  - 51.5%
- - Calcitonin is secreted by the [...] or [...] cells of the thyroid.
  - C or parafollicular
  - 51.5%
- - Where in the body is vitamin D synthesized in its inactive form?
  - Skin
  - 51.5%
- - How does PTH binding to osteoblasts affect osteoclast activity?
  - Secretion of cytokines which stimulate osteoclasts
  - 48.5%
- - What effect does PTH have on the reabsorbtion of (PO4)2-?
  - Inhibition
  - 48.5%
- - PTH [...]creases renal phosphate reabsorption.
  - decreases
  - 48.5%
- - Which enzyme needed for vitamin D activation does PTH activate?
  - 1-alpha-hydroxylase
  - 48.5%
- - Are there vitamin D receptors on osteoclasts?
  - No
  - 48.5%
- - Which population is most at risk of vitamin D intoxication?
  - Infants
  - 48.5%
- - What are the symptoms of vitamin D intoxication (2)?
  - Nausea and vomiting; Hypercalcaemia and ectopic calcification
  - 48.5%
- - Which part of the cell does vitamin D act on to stimulate Ca2+ absorption?
  - Plasma membrane
  - 45.5%
- - Which 2° messenger is involved in the inhibition of PTH secretion in response to low Ca2+ levels?
  - IP3
  - 42.4%
- - Which 2° messenger is involved in the inhibition of osteoclast activity in response to calcitonin?
  - cAMP
  - 39.4%
- - Hypoparathyroidism due to receptor malfunction is called [...].
  - pseudohypoparathyroidism
  - 36.4%
- - Hypoparathyroidism due to mutant PTH is called [...].
  - pseudoidiopathic hypoparathyroidism
  - 30.3%
- - Vitamin D promotes the synthesis of which protein family?
  - Calbindins
  - 24.2%