Describe how summations occurs in muscle cells
What will be an ideal response?
Twitch summation and tetanus can be achieved by increasing the frequency at which a muscle is stimulated to contract. This causes the muscle to contract before it can completely relax so that contractions are added, or summed up, on each other. This action produces a stronger contraction than a single stimulation. In tetanus, the muscle is stimulated so quickly that it does not have the chance to rest at all between stimulations and a smooth, maximal strength contraction occurs.
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Sympathetic innervation of the digestive system
A. relaxes GI sphincters. B. stimulates GI gland secretions. C. promotes digestive activity. D. vasoconstricts blood vessels to the GI tract. E. stimulates peristalsis.
The surgical procedure that cuts a dog's vocal cords to soften barking is known as ________________________________________
Fill in the blank(s) with correct word
Chewing increases which of the following secretions?
a. salivary secretion. b. gastric secretion. c. pancreatic secretion. d. both (a) and (b) above. e. all of these answers.
During resting conditions, ________ is synthesized to store energy.
A. Ca2+ B. creatinine C. pyruvate D. creatine phosphate E. lactate