Which choice is not a unit of stiffness?

 Bitter receptors sense 

 Pain receptors 

 Diabetes insipidus is caused by 

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.

 __________ controls hormone concentrations. 

 Compared to the nervous system, the endocrine system 

 Hyperparathyroidism 

 Cushing syndrome 

 The secretion of parathyroid hormone is controlled primarily by the