Best brainly meme 100%
Would copy and paste spam on peoples profile's.
Answer:
b. The rats press the lever least when cocaine is presented.
Explanation:
Reinforcement or reward refers to the physiological processes by which a given behavior, such as drug use, becomes habitual. This occurs when neurons release the neurotransmitter dopamine to the nucleus accumbens (NAc) after drug use.
In tobacco, nicotine is the main component triggering of the reinforcement. Once inside the brain, nicotine activates nicotinic receptors, which in turn contributes to the reinforcement mechanism. Following repeated exposure to nicotine, a neuroadaptation process is established for some (but not all) effects of nicotine. Increased brain nAChRs (acetylcoline receptors) are observed in response to desensitization of these nicotine-mediated receptors. This desensitization can play an important role in the development of tolerance and dependence.
The fact that nicotine is a weak reinforcer, means that maybe the rat already had an neuroadaptation with this drug, not feeling anything with this drug anymore, and thats why he would prefer other drug, like cocaine, pressing the lever of nicotine less often.
I believe Toxocariasis is the answer you need
Answer:
Bone pain, numbness, fatigue, mental fogginess, etc.
Explanation:
Multiple myeloma is a type of cancer which forms in plasma cell (a type of white blood cell). Plasma cell makes antibodies which help the body in fighting against infections but in the case of Multiple myeloma cancer cells crowd out the healthy blood cells and gets accumulate in the bone marrow and rather than creating antibodies cancer cells starts producing harmful abnormal proteins that can cause complications.
It's symptoms include:
- Bone pain, especially in chest and spine.
- Numbness in legs.
- Mental fogginess.
- Infections.
- Weight loss.
- Loss of appetite.
