Statistically speaking, the experimental hypothesis is generally referred to as the __________ hypothesis

In which stage of the general adaptation syndrome does an increased risk of illness occur?

a. alarm b. resistance c. exhaustion d. in every stage

Which transmitter below induces muscle movement and is the primary transmitter secreted by efferent axons of the central nervous system?

a. acetylcholine b. GABA c. serotonin d. glycine e. glutamate