Muscle is excitable because it can be stimulated in order to cause contraction. Stimulation comes from the nervous system via electric signals/action potential that travels frâ¦om neuron through axon to muscle tissue.
Breed Profile--Written By Tiami Coleburg Breed: Labrador Retriever Owner Level: Suitable for some active and involved first time owners. Average Life Span: 12-14 years Average Weight: Male weights range 65-80 pounds. Female weights range 55-70 pounds. Average Weight Male height ranges from 22 1/2 to 24 1/2 inches high at the shoulder. Female height ranges from 21 1/2 to 23 1/2 inches at the shoulder. Color And Coat: True Labrador Retrievers only come in: black, shades of chocolate, and yellow.
Male Labrador Retriever: On average, 60 to 80 lbs., but some can weigh as much as 100 lbs. or more. Female Labrador Retriever: 55 to 70 lbs. Male Chesapeake Bay Retriever: â¦ 65 to 80 lbs. Female Chesapeake Bay Retriever: 55 to 70 lbs.n okay breeder will charge $250-300. A great breeder will charge much more. If you are buying from a breeder, make sure the parents have hip, elbow, a â¦ nd eye certifications.