Excitation Contraction Coupling

Q.

What triggers the release of calcium from the sarcoplasmic reticulum?

Q.

Which type of tissue is responsible for receiving, interpreting and producing a response to stimuli?

1. Muscle tissue

2. Nervous tissue

3. Epithelial tissue

4. Connective tissue

Q. At the neuromuscular junction, nerve impulses are carried across the synaptic cleft by neurotransmitters.

1. True
2. False

Q.

Which of the following statements is not correct?

1. An action potential is propagated along sarcolemma and down the T - tubules.

2. The tiny gap between the innervating neuron and the sarcolemma of the muscle fiber it is innervating, is called the T - tubule

3. Triads in skeletal muscle consist of 2 T-tubules and a cisternae

4. Acetylcholine at the neuromuscular junction is broken down by acetylcholinesterase, and this terminates the stream of action potentials along the muscle fiber surface.