Physio Gonsalves Lab 5.1-5.3, 7.1
Question and answers correctly solved
2025
Arrange these structures in decreasing order of size: sarcomere, fibril,
filaments, fiber: - correct answer 1. Fiber
2. Fibril
3. Sarcomere
4. Filament
The electrical events conducted along the cell (plasma) membrane that
stimulate contraction are called - correct answer action potentials
Actin and myosin comprise the and filaments, respectively. - correct answer
thick, thin
What substance couples electrical excitation to muscle contraction? - correct
answer Ca2+
Ca2+ is stored in which intracellular organelle - correct answer sarcoplasmic
reticulum
Ca2+binds to a regulatory protein known as which in turn is bound to an
inhibitory protein called - correct answer troponin, tropomyosin
the neurotransmitter chemical that stimulates contraction of skeletal muscles -
correct answer acetylcholine or ACH
Question and answers correctly solved
2025
Arrange these structures in decreasing order of size: sarcomere, fibril,
filaments, fiber: - correct answer 1. Fiber
2. Fibril
3. Sarcomere
4. Filament
The electrical events conducted along the cell (plasma) membrane that
stimulate contraction are called - correct answer action potentials
Actin and myosin comprise the and filaments, respectively. - correct answer
thick, thin
What substance couples electrical excitation to muscle contraction? - correct
answer Ca2+
Ca2+ is stored in which intracellular organelle - correct answer sarcoplasmic
reticulum
Ca2+binds to a regulatory protein known as which in turn is bound to an
inhibitory protein called - correct answer troponin, tropomyosin
the neurotransmitter chemical that stimulates contraction of skeletal muscles -
correct answer acetylcholine or ACH
