Answer:
Both inhalation and exhalation depend on pressure gradients between the lungs and atmosphere, as well as the muscles in the thoracic cavity.
Explanation:
The thoracic cavity, or chest cavity, always has a slight, negative pressure which aids in keeping the airways of the lungs open. During the process of inhalation, the lung volume expands as a result of the contraction of the diaphragm and intercostal muscles (the muscles that are connected to the rib cage), thus expanding the thoracic cavity. Due to this increase in volume, the pressure is decreased, based on the principles of Boyle’s Law. This decrease of pressure in the thoracic cavity relative to the environment makes the cavity pressure less than the atmospheric pressure. This pressure gradient between the atmosphere and the thoracic cavity allows air to rush into the lungs; inhalation occurs. The resulting increase in volume is largely attributed to an increase in alveolar space because the bronchioles and bronchi are stiff structures that do not change in size.During this process, the chest wall expands out and away from the lungs. The lungs are elastic; therefore, when air fills the lungs, the elastic recoil within the tissues of the lung exerts pressure back toward the interior of the lungs. These outward and inward forces compete to inflate and deflate the lung with every breath. Upon exhalation, the lungs recoil to force the air out of the lungs. The intercostal muscles relax, returning the chest wall to its original position. During exhalation, the diaphragm also relaxes, moving higher into the thoracic cavity. This increases the pressure within the thoracic cavity relative to the environment. Air rushes out of the lungs due to the pressure gradient between the thoracic cavity and the atmosphere. This movement of air out of the lungs is classified as a passive event since there are no muscles contracting to expel the air.
<span>The feature that would distinguish euglena from cyanobacteria is the
membrane-bound nucleus.</span> Also, cyanobacteria do not have
flagella, while euglena does. Cyanobacteria is a prokaryotic organism and thus, doesn’t have a nucleus, but unlike heterotrophic prokaryotes, cyanobacteria have internal membranes (thylakoids).
<span>Euglena is a eukaryotic organism which contains chloroplast for the photosynthesis.</span>
Answer:
I'm looking for the answer too but unless the person has seen the question and answer choices no one can help you because you don't have answer choices.
Explanation:
Hope this encourages you or notifies you to put answer choices.
Answer:
Systosolic blood pressure
Explanation:
The systosolic blood pressure occurs when the heart is contracting and pushing the blood round the body. It is more important than diastolic blood pressure.
When the heart beats, it contracts and pushes blood through the arteries to the rest of your body.
This force creates pressure on those blood vessels which are the arteries, producing the systolic blood pressure as compared to diastolic blood pressure that measures the lowest block pressure between heartbeats.
The answer would be mitochondria
The primary form of energy that the cell use are come from ATP. The body could produce ATP through different path of metabolism, but the highest amount of ATP produced from electron transport chain. Mitochondria is the main organelle of the cell that produce ATP because it allow the cells to do electron transport chain.
