Many tiny hair-like cilia protrude from the olfactory receptor cell's dendrite into the mucus covering the surface of the olfactory epithelium. The surface of these cilia is covered with olfactory receptors, a type of G protein-coupled receptor.
Respiration -10 to 30. The normal respiratory rate for dogs is 16 to 20 breaths per minute. The normal heartrate is 70 to 160 bpm. Large dogs tend to have slower heart rates so your dog should be in the 70 to 120 bpm range. This varies according to the cardiovascular fitness of the dog, too.
A dog respiratory rate under 10 breaths per minute is considered abnormal, and so is a rate of more than 30 breaths per minute. If your pet's respiratory rate is abnormal, this may be due to a wide range of illnesses.An increased respiratory rate may be indicative of:1  Heat stroke.2  Exhaustion.3  Poisoning. dog respiratory rate under 10 breaths per minute is considered abnormal, and so is a rate of more than 30 breaths per minute. If your pet's respiratory rate is abnormal, this may be due to a wide range of illnesses. An increased respiratory rate may be indicative of: 1  Heat stroke. 2  Exhaustion. 3  Poisoning.