Answer:
4, 3 5, 1, 2.
Explanation:
The events of muscle contraction begins from the presynaptic neuron, which cause the influx of Ca+, and the release of acetycholine neurotransmitter into the synaptic cleft.
The Ach, binds with the receptors in the sarcolemma, leading to opening of Ligand gated Na+ channels. Therefore Na+diffuses in, causing depolarization, and propagation of action potential along the sarcolemma spreading to the T-tubules.
This is followed by opening of Calcium channels leading exist of Ca+ from the sarcoplasmic reticulum.
The Calcium binds with the troponin, and Tropomysoin exposed the myosin binding sites on the actin filament.Thus cross-bridge is formed by the myosin head with thin filaments which shortened the sarcomere, leading to contraction of muscle fibres.
Answer:
I believe it is B.
I am not sure if I am right, sorry if I am wrong.
Explanation:
Answer: Cells undergo mitosis in order to promote growth or to repair damage.
Explanation:
Answer:
Air moves out of the lungs when the pressure in the lungs is greater than the pressure in the atmosphere.
<span>The correct answer to the question above is snapping turtle and rattlesnake. The snapping turtle and rattlesnake is a pair of organisms that is mostly closely related to primates. They are both reptiles and from the same classification.</span>