1. A SYSTEM OF GLANDS THAT RELEASE HORMONES INTO THE BODY TO REGULATE IT:
a) circulatory system
b) nervous system
c) endocrine system
d) digestive system

2. AN ORGAN IN THE BODY THAT PRODUCES A PARTICULAR CHEMICAL:
a) glands
b) hormones
c) insulin
d) acetylcholine

3. TO CONTROL ITS AMOUNT OR FREQUENCY:
a) control
b) transfer
c) measure
d) regulate

4. A SUBSTANCE THAT CAUSES A BODY´S CELLS TO PERFORM A PARTICULAR ACTION:
a) insulin
b) hormones
c) acetylcholine
d) glands

5. A HORMONE THAT REGULATES THE AMOUNT OF SUGAR IN BLOOD:
a) endorphin
b) acetylcholine
c) insulin
d) norepinephrine

6. A CHEMICAL THAT TRANSMITS A SIGNAL FROM ONE NEURON TO ANOTHER:
a) glands
b) neurotransmitters
c) hormones
d) neuromodulators

7. A HORMONE THAT THE BRAIN PRODUCES UNDER STRESS, WHICH ACTS AS A NEUROTRANSMITTER AND CONTROLS FUNCTIONS SUCH AS HEART RATE AND BLOOD PRESSURE:
a) insulin
b) endorphin
c) acetylcholine
d) norepinephrine

8. A HORMONE THAT ACTS AS A NEUROTRANSMITTER AFFECTING SENSATIONS OF PLEASURE AND PAIN:
a) endorphin
b) acetylcholine
c) norepinephrine
d) insulin

9. A NETWORK OF NEUROTRANSMITTERS THAT TRANSMIT INFORMATION TO MULTIPLE SYSTEMS IN THE BODY AT ONCE:
a) hormones
b) glands
c) neuromodulators
d) neurotransmitters

10. A NEUROMODULATOR THAT ALLOWS THE SPINAL CORD TO CONTROL MUSCLES, AMONG OTHER FUNCTIONS:
a) acetylcholine
b) endorphin
c) norepinephrine
d) insulin