1. Your threshold stimulus voltage when the electrodes were placed in the muscle
ID: 3522789 • Letter: 1
Question
1. Your threshold stimulus voltage when the electrodes were placed in the muscle: 2. Your threshold stlmulus voltage when the electrodes were placed on the nerves DATA FOR EXERCISE 5.1 V. REVIEW ACTIVITIES FOR EXERCISE 5.1 Test Your Knowledge 1. Arrange these structures in decreasing order of size: sarcomere, fibril, alaments, fber 2. The electrical events conducted along the cel( plasma) membrane that stimulate contraction are called and 4. 5. 6. respectively What substance couples electrical excitation to muscle contraction? The substance named in question 4 is stored in which intracellular organelle? The substance named in question 4 binds to a regulatory proteln known as which in turn is bound to an inhibitory protein called 7. The neuro transmitter chemical that stimulates contraction of skeletal muscl est Your Understanding ts and the bands. Then, describe and lustrate how the structure of a Then, describe Draw a sarcomere and label the parts changes during muscle contraction. 8. starting from the moment ACh binds to its receptors in the sarcolemma 9. Trace the course of events Ca2 enters the sarcoplasmExplanation / Answer
1) Decreasing order of size
a) Muscle fibre - daimeter ranging from micrometer to millimeter.
b) Filaments - 10-50 micrometer
c) Sarcomere - 1.6 - 2.2 micrometer
d) Fibrils - 10-100 nanometer
2) The electrical events conducted along the cell (plasma) membrane that stimulate contraction are called Action potential.
3) Actin and myosin comprise the thin and thick filaments respectively.
4) The substance that couples electrical excitation to muscle contraction is Calcium (Ca2+).
5) Calcium is strored in Sarcoplasmic reticulum.
6) Calcium binds to a regulatory protein known as Troponin and binds to inhibitory protein known as Tropomyosin.
7) The neurotransmitter chemical that stimulates contraction of skeletal muscles is called Acetylcholine (Ach).
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.