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.
At birth, a Labrador puppy from average parents and an average litter (6 puppies) weighs about 1 pound or less. During the first 8 weeks of its life the puppy gains about 2 pounds a week. An 8 week old Labrador puppy weighs between 11 and 17 pounds.From 8 weeks to 26 weeks (6 months) this growth proceeds in about the same way-an average six month old Labrador weighs between 50 and 60 pounds.Dogs are heavier than bitches.udging your Lab's weight this way ensures that it is right for him and not just right for the average member of the breed. It is almost always possible to adjust the feeding schedule to ensure proper weight in a puppy fed primarily dog food.