Final answer:
Carcinoid tumors are not strongly associated with smoking, and the paraneoplastic syndrome associated with these tumors is Cushing's syndrome due to some of them producing ACTH. Smoking is linked to several other cancers, and UV radiation to skin cancers. Common cancer signs include unexplained weight loss and persistent fatigue.
Step-by-step explanation:
Carcinoid tumors are a type of neuroendocrine tumor that typically arise in the gastrointestinal tract or lungs. While many types of cancer are related to smoking, carcinoid tumors have not been strongly associated with smoking. The paraneoplastic syndrome that is associated with carcinoid tumors is Cushing's syndrome. This occurs due to production of ACTH (adrenocorticotropic hormone) by some carcinoid tumors, leading to an overproduction of cortisol, hence causing Cushing's syndrome.
When discussing types of cancers associated with chemicals in cigarettes, it's important to note lung cancer, throat cancer, esophageal cancer, and bladder cancer among others. UV radiation primarily causes skin cancers such as melanoma, basal cell carcinoma, and squamous cell carcinoma. Signs of cancer can include unexplained weight loss, persistent fatigue, changes in bowel or bladder habits, persistent cough or hoarseness, and lumps or thickened areas in tissues.