Advertisements
Advertisements
प्रश्न
Exchange of calcium between bone and extracellular fluid takes place under the influence of certain hormones. What will happen if very less amount of Ca++ is in the extracellular fluid?
Advertisements
उत्तर
If a very less amount of Ca++ is in the extracellular fluid then parathyroid hormone (PTFI) acts on bones and stimulates the process of bone resorption (dissolution/demineralisation). PTH also stimulates the reabsorption of Ca2+ by the renal tubules and increases Ca2+ absorption from the digested food.
APPEARS IN
संबंधित प्रश्न
Describe the important steps in muscle contraction.
Answer the following question.
How is the structure of sarcomere suitable for the contractility of the muscle? Explain its function according to sliding filament theory.
Answer the following question.
How does the structure of actin and myosin help in muscle contraction?
Name the filaments present in the sarcomere.
Explain the sliding-filament theory of muscle contraction.
Which are involved in muscle contraction?
Exchange of calcium between bone and extracellular fluid takes place under the influence of certain hormones. What will happen if more of Ca++ is in extracellular fluid?
Radha was running on a treadmill at a great speed for 15 minutes continuously. She stopped the treadmill and abruptly came out. For the next few minutes, she was breathing heavily/fast. Answer the following questions.
How did her breathing rate change?
What is the source of energy for muscle contraction?
Calcium ion concentration in blood affects muscle contraction. Does it lead to tetany in certain cases? How will you correlate fluctuation in blood calcium with tetany?
Explain sliding filament theory of muscle contraction with neat sketches.
Discuss the role of Ca2+ ions in muscle contraction. Draw neat sketches to illustrate your answer.
