During the early 1900's, unions were viewed by the law as voluntary organizations of individuals and, since U.S. law valued individual liberty and freedom above all else, unions and workers were allowed relative freedom to use whatever means they could to protect their wages and working conditions.

Receptors that in general produce an action potential in response to a receptor potential are ________ receptors.

A) phasic
B) primary
C) secondary
D) tonic

Explain the four ethical principles embodied by conservation biology.

The molecule that connects a growing polypeptide chain and mRNA is called:

A) tRNA.
B) RNA polymerase.
C) rRNA.
D) a promoter.
E) a ribosome.

Changes in blood pH are detected by:

A) interoceptors.
B) exteroceptors.
C) mechanoreceptors.
D) proprioceptors.
E) thermoreceptors.

Which of the following is an accurate comparison of Alzheimer and Parkinson diseases?

A) In both cases, the patient slowly loses memory and slowly drifts into inactivity.
B) In both cases, the patient becomes increasingly excited and overstimulated.
C) Patients with Alzheimer disease produce too much beta amyloid, while those with Parkinson produce too little dopamine.
D) Patients with Alzheimer disease produce too little beta amyloid, while those with Parkinson disease produce too little dopamine.
E) Patients with Alzheimer disease produce too much beta amyloid, while those with Parkinson disease produce too much dopamine.