Answer:
provides protection to the valves and heart chambers.
Explanation:
It refers to ow much energy is expanded while exercising.
Answer:
<em><u>The answer is</u></em>: <u>Stimulating.</u>
<u />
Explanation:
<u>Classification of drugs according to their effects on the nervous system</u>:
DEPRESSORS. Alcohol. Opioids: heroin, morphine, methadone. ...
STIMULANTS. Major stimulants: amphetamines and <u>cocaine</u>. Minor stimulants: nicotine, caffeine.
DISTURBING. Hallucinogens: LSD, mescalina, peyote. Cannabis derivatives: hashish, marijuana.
<em><u>The answer is</u></em>: <u>Stimulating.</u>
