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The body regulates the concentration of blood plasma and body fluids primarily through homeostasis, involving mechanisms like osmoregulation and the actions of hormones such as antidiuretic hormone (ADH) and aldosterone. Osmoreceptors in the hypothalamus detect changes in plasma osmolarity, prompting thirst or the release of ADH to increase water reabsorption in the kidneys. Additionally, aldosterone helps control sodium levels, influencing water retention and blood volume. The kidneys play a crucial role by filtering blood and adjusting the excretion of water and electrolytes to maintain balance.
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Why use plasma concentration rather than blood concentration in monitoring drug concentration in the body?
Most compounds are given as their concentration in blood plasma as well as with the conditions of collection. It is a form of standardization used in order to compare results across laboratories and over time. As blood volume and percent hematocrit (a measure of red blood cells) are fairly constant relative to body mass using the concentration in plasma ensures consistency in measurement. Another factor is that red blood cells are not equilibrated with the concentration of all compounds outside the cell equally. Transportation of compounds across the cell membrane is regulated.
Is the concentration of glucose higher in cerebrospinal fluid or plasma?
The concentration of glucose is typically higher in plasma (blood) compared to cerebrospinal fluid because glucose is actively transported from blood into the brain. Normal CSF glucose levels are around 60-70% of plasma glucose levels.
What causes hemodilution?
Hemodilution is caused by an increase in the volume of plasma in the bloodstream, leading to a decreased concentration of blood cells and proteins. This can occur due to excessive fluid intake, infusion of large volumes of IV fluids, or conditions such as congestive heart failure or liver failure. Hemodilution can affect blood tests by altering the concentration of various blood components.
What is meant by a saline solution that is isotonic with blood plasma?
A saline solution that is isotonic with blood plasma has the same concentration of solutes as blood plasma, ensuring that there is no net movement of water across cell membranes. This balance helps to prevent cell shrinkage or swelling, making the solution ideal for medical applications such as intravenous drips.
Which plasma constituent is the main contributor to osmotic pressure?
Albumin is the main constituent in plasma that contributes to osmotic pressure. It helps maintain the balance of fluids between the blood and tissues by exerting osmotic pressure to keep fluid within the blood vessels.
What is hemo-concentration?
Hemoconcentration occurs when there is an increase in the concentration of blood cells as the result of the loss of plasma from the bloodstream. A decrease in volume of plasma and an increase in red blood circulating.
What is plasma viremia titer?
It is a way of representing the concentration of the virus particles in blood plasma
What osmometer cell sense?
chages in the concentration of blood plasma
When does FSH peak in concentration in the blood plasma?
Day 3
What is the normal concentration of sodium chloride in human blood plasma?
The normal concentration of sodium chloride in human blood plasma is around 0.9% or 9 grams per liter. This concentration is important for maintaining proper hydration levels and osmotic balance in the body. Any significant deviation from this concentration can lead to health issues.
Water passes from the tissue fluids into the blood capillaries mainly because?
lymph blood has a higher protein concentration than the tissue fluids
The presence of plasma proteins in the blood increases its what pressure as compared to tissue fluids?
venous
Why use plasma concentration rather than blood concentration in monitoring drug concentration in the body?
Most compounds are given as their concentration in blood plasma as well as with the conditions of collection. It is a form of standardization used in order to compare results across laboratories and over time. As blood volume and percent hematocrit (a measure of red blood cells) are fairly constant relative to body mass using the concentration in plasma ensures consistency in measurement. Another factor is that red blood cells are not equilibrated with the concentration of all compounds outside the cell equally. Transportation of compounds across the cell membrane is regulated.
What carries blood with high concentration of urea?
the blood plasma carries waste products, including urea.
What causes hemo-concentration?
When a person loses blood plasma, a rise in cellular concentration as well as protein concentration occurs. This is hemoconcentration when this occurs.
Is the concentration of glucose higher in cerebrospinal fluid or plasma?
The concentration of glucose is typically higher in plasma (blood) compared to cerebrospinal fluid because glucose is actively transported from blood into the brain. Normal CSF glucose levels are around 60-70% of plasma glucose levels.
If body cells lack ldl receptors the plasma concentration of ldl molecules?
increases and the blood cholesterol concentration increases.
