inositol

[drkooks]

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can someone explain the relation between inositol and intracellular calcium?


and is salivary secretion an active or passive process why??

 

[32pearls]

Good question abt salivation,never thought of it like that. Shouldn't salivation be both active & passive?? Because in a healthy individual it is produced continuously & produced in excess when stimulated. In other words ,salivary flow is more during parasympathetic stimulation & slows down at rest & really slow while sleeping.
Lets wait for a better answer !👍

 

[skabbaraju]

can someone explain the relation between inositol and intracellular calcium?


and is salivary secretion an active or passive process why??

Good questions.
1. Inositol opens the ca+2 channels on sarcoplasmic reticulum and helps in releasing Ca+2 into the sarcoplasm. This is useful in muscle contraction as u know.
2. Salivary secretion ? may be a passive process. I definitely don't think its an active process. It is mainly under neural control and is affected by physiological states. The pH of saliva is usually maintained by water movement across membranes.

 

[shreyalokray]

Salivary secretion is definitely an active process.

An active process is one which consumes energy. This usually involves the hydrolysis of ATP to ADP and ~Pi (free phosphate). The primary saliva secretion is produced in the "secretory units" of the saliva glands and involves the transport of sodium, potassium and chloride ions across the secretory cell outer membrane. These ions are moved using pumps such as the Na/K/Cl co-transporter and the Na/K pump which use energy.