The nerve system communicates with basically all the systems in your body to help them function, and so does the cardiovascular system. Without these two systems, your body will not have the capacity to live.
Answer:
The net products of (glycolysis) are 2 ATP, 2 NADH, and 2 pyruvic acid molecules
Answer:
The source of Calcium (Ca⁺⁺) for the skeletal muscle cells is the sarcoplasmic reticulum, the main store of intracellular Ca⁺⁺.
Explanation:
Calcium (Ca⁺⁺) is an ion that plays an important role in muscle contraction, a process that requires high cytoplasmic concentrations of this ion to promote myofibrillary activity.
The sarcoplasmic reticulum (SR) -equivalent to the endoplasmic smooth reticulum- is an organelle that regulates the contractile activity of skeletal muscle. The two terminal cisterns of the SR attach to the T-tube, forming a triad, which surrounds the myofibrilla.
Once the muscle cell receives the signal to contract, the Ca⁺⁺ channels are opened and allow Ca⁺⁺ to enter the cell, promoting the exit of this cation from the SR and increased its cytoplasmic levels. This stimulates muscle contraction.
If sugar concentration within a cell is high/rises, then water will enter the cell increasing the volume of cytoplasm within the cell and hence the volume/size of the cell itself;
Alternatively, if the sugar concentration within a cell is low/falls, then water leave the cell decreasing the volume of cytoplasm withing the cell and thus the cell will get smaller.
Shunting is blood movement across the chambers of the heart.