There actually could be a lot of reasons why your dog is trembling. My own dog trembles but only when she's begging not to go outside or something. This is a good website to read more info about dog trembling.
http://petcare.suite101.com/article.cfm/why_is_my_pet_shivering
this website talks about more serious illnesses though.
Your dog is ill, please go to the vet, your pet could have an illness causing this.
Go to the vet NOW
A dog would be panting because as a stuctural adaptaion . My answer is no because a dog would be panting because is hot.
Yes and no. If the dog has been playing ball, panting is the way dogs sweat. If the dog is giving birth, panting accompanies labor and delivery. If the dog is wounded and the wound is painful and infected, panting is an indication of pain.
to have a dog
Dog panting is physical because certain muscles make it happen - blinking in animals is also physical.
My dog has been panting all day.The wolf sat in the corner, panting and eyeing up the prey he has saved for dinner.
The dog is panting because of the excesssive heat.
Evaporative Cooling.
Katherine A dog
Yes, they do this when they are panting.
Panting is effective at cooling a dog off when it's too hot. Dogs can't sweat so panting is the only natural way for it to cool themselves off.
Well if it just panting it's a dog but if it's talking to you it's call me crazy, a werewolf.
Dogs expel heat in their bodies by panting.