the air and all the gasses
<u>Answer</u>:
The difference between systemic and pulmonary circulation is the Systemic circulation carries the blood between to the heart and body and the pulmonary circulation carries blood between the lungs and the heart.
<u>Explanation</u>:
Circulation of blood is of two types:
The systemic circulation and The pulmonary circulation.
The Systemic circulation carries the oxygenated blood from heart to the body through the arteries (aorta) and also carries back the deoxygenated blood from the body to the heart through veins (superior vena cava) and pulmonary circulation carries deoxygenated blood to the lungs from the heart and from the lungs to the heart.
In Pulmonary circulation the pulmonary artery is used to carry the deoxygenated blood to the lungs and the pulmonary vein is used to carry oxygenated blood to the heart from the lungs.
Answer:
A) increasing frequency of action potentials only.
Explanation:
If the muscle fibers begin the contraction with the sarcomere too elongated, the thick and thin filaments would be barely overlapping, forming few crossed bridges. On the contrary, if the sarcomere is too shortened so that the thick filaments reach the z-disks, the myosin is unable to find new fixation sites for cross-bridge formation and the tension decreases rapidly.
But to better understand how the contraction force increases, it should be noted that a single contraction does not represent the maximum force that a muscle fiber can develop. <u>The force generated by the contraction of a muscle fiber is increased, increasing the frequency with which the action potentials of the muscle stimulate said fiber,</u> that is to say that the nervous system controls part of this.
A potential muscular type action lasts between 1 and 3 ms. While muscle contraction can last 100 ms. If the repeated action potentials are separated by prolonged intervals of time, the muscle fiber has time to fully relax between the stimuli. If the action potentials continue to stimulate muscle fiber repeatedly at short intervals (high frequency), the relaxation between contractions decreases until the muscle fiber achieves a state of maximum contraction known as tetanus.
The carbon cycle by which carbon is exchanged among the biosphere, pedosphere, geosphere, hydrosphere, and atmosphere of the Earth.