1
Q
What is tetanus
A
A single action potential from a motor neurone will produce a single contraction in the muscle fibres innervated by the motor neuron . Isolated contraction is called a twitch
2
Q
Explain summation
A
Muscles can be activated to contact many times even before it has time to relax
- At high frequencies of activation there is a build up of tension called summation
Complete tetanus - reaches maximum level of tension
3
Q
Types of visceral smooth muscle
A
ntestine
* Uterus
* Bladder
* Ureters
* Ducts of exocrine glands
* Precapillary sphincters
* Small blood vessels e.g. arterioles
4
Q
Types of multiunit smooth muscle
A
Cilliary muscle
* Iris
* Piloerector muscles
* Large arteries and veins
* Arteriovenous shunt vessels
* Bronchial smooth muscle
