QUESTION 14 What is the function of the presynaptic "autoreceptors" in axon terminals? a. To release substances into the blood Ob. To detect transmitter concentrations in the cleft Oc. To release neurotransmitters into extracellular fluid O d. To release the neurotransmitter acetylcholine QUESTION 15 What distinguishes the ANS from the somatic motor system? a. The ANS excites its peripheral targets. Ob. The ANS balances synaptic excitation and inhibition. Oc. The ANS has a single function. Od. The ANS constitutes total neural output.

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Stress

Stress is defined as the feeling of being overwhelmed or unable to cope with emotional or mental pressure. Any event or action that makes a person annoyed, furious, or nervous can trigger it. Chemical changes in the body caused by stress can cause blood pressure, blood sugar levels, and heart rate to rise.