Which choice is not a unit of stiffness?

 Pain receptors 

 Bitter receptors sense 

 Diabetes insipidus is caused by 

 __________ controls hormone concentrations. 

Given the timber subject to axial force and resisted by a bolt in double-shear, determine the block-shear stress in the timber.  Provide your answer in psi, but do not include units in your answer.

 Compared to the nervous system, the endocrine system 

 The secretion of parathyroid hormone is controlled primarily by the 

 Cushing syndrome 

 Hyperparathyroidism