Question

T/F: blood volume is finite, but blood can be moved from one compartment (organ) to another or where ever it is needed

Answer 1

Blood volume is indeed finite, but the cardiovascular system can efficiently redistribute blood to different tissues based on demand, like during exercise or after a meal. The circulatory system includes the cardiovascular system and is not limited to lung circulation only. Plasma proteins contribute to osmotic pressure but generally do not cross the capillary walls via facilitated diffusion.

Step-by-step explanation:

True or false: blood volume is finite, but blood can be moved from one compartment (organ) to another or wherever it is needed. This statement is true. The circulatory system is adept at redirecting blood flow to different parts of the body depending on the physiological demands. While the volume of blood in the body is indeed finite, the cardiovascular system can allocate resources efficiently. For instance, during exercise, more blood is directed towards the skeletal muscles, heart, and lungs, while after eating, the digestive system receives more blood. The brain, however, maintains a stable supply of blood in various conditions.

Regarding another question, the statement that the circulatory system brings blood to and from the body, while the cardiovascular system brings blood to and from the lungs only, is false. The circulatory system includes the cardiovascular system, which circulates blood throughout the entire body, not just to and from the lungs.

The plasma proteins generally do not cross the capillary cell membrane via facilitated diffusion; they are typically retained within the blood vessels due to their large size, contributing to the blood's osmotic pressure and helping maintain fluid balance between blood vessels and tissues.

Answer 2

Blood volume in the body is finite, but the cardiovascular system dynamically allocates blood to various organs as needed, based on activity and metabolic demands. This efficient management ensures that all tissues receive appropriate blood flow for optimal function. The process is regulated by pressure-driven mechanisms such as filtration and reabsorption.

Step-by-step explanation:

The statement that blood volume is finite, but blood can be moved from one compartment (organ) to another or wherever it is needed is true. Blood flow is the process of moving blood throughout the body to provide oxygen, and nutrients, and remove waste from tissues. This flow is determined by the cardiovascular system through a network of blood vessels, including arteries, veins, and capillaries. The heart is the driving force that pumps blood throughout these vessels, moving it from areas of higher pressure to areas of lower pressure. Due to variable demands on the body, blood flow is dynamically adjusted, with more blood directed to different tissues based on their current needs. For instance, during exercise, increased blood flow to skeletal muscles, the heart, and lungs is necessary, while post-meal blood is preferentially directed towards the digestive system.

Moreover, movements such as filtration and reabsorption help to regulate the distribution of blood in the capillary beds, guided by pressures like hydrostatic and osmotic pressure. Thus, while the overall volume of blood in the body is limited, the cardiovascular system efficiently manages its distribution, ensuring all organs receive what they need for optimal function based on activity levels and metabolic demands.In the context of hematopoiesis, it's crucial to remember that blood is a mixture of cells and plasma, responsible for delivering essential substances to body cells and removing waste. This continuous cycle is vital for maintaining the homeostasis of our internal environment.