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What else can I help you with?
What does bone have that cartilage does not?
Bone is harder and more rigid than cartilage due to its mineralized matrix, predominantly composed of calcium and phosphorus. Bone also contains specialized cells like osteocytes, which are responsible for maintaining bone structure and function. Cartilage, on the other hand, is more flexible and resilient due to its high water content and lacks the mineralized matrix found in bone.
Nutrients diffuse quickly through cartilage matrix but very poorly through solid bone matrix true or false?
True. Cartilage matrix is avascular and has a high water content, allowing nutrients to diffuse quickly. In contrast, bone matrix is solid and less permeable, so nutrients diffuse less efficiently through it.
What is a biological oxygen demand?
A biological oxygen demand is another term for a biochemical oxygen demand - the amount of oxygen needed by aerobic microorganisms to decompose all the organic matter in a sample of water - used as a measure of pollution.
Does epinephrine decrease myocardial oxygen demand?
Yes, epinephrine can decrease myocardial oxygen demand by increasing coronary perfusion, improving cardiac output, and reducing systemic vascular resistance. However, high doses of epinephrine may increase myocardial oxygen demand due to its positive inotropic and chronotropic effects.
How much oxygen does the heart use at rest?
The heart utilizes around 60-70% of the oxygen it receives at rest. This high demand for oxygen is necessary for the heart to continue functioning properly and efficiently.
Will a cashier be in high demand or low demand?
it will be in high demand
What type of cartilage has a great deal of collagen in the matrix?
We call cartilage that is high in fiber fibrous cartilage. Fibrous cartilage is found in the intervertebral discs and pubic symphysis.
How much oxygen do we need?
On average, humans require about 2 liters of oxygen per minute at rest. This amount can increase during physical activity or in high-altitude environments to meet the body's higher demand for oxygen.
Why would erythropoiesis increase?
Erythropoiesis may increase in response to low oxygen levels in the blood, a condition known as hypoxia, which can occur due to high altitude, chronic lung disease, or anemia. The kidneys detect decreased oxygen and release more erythropoietin, a hormone that stimulates the production of red blood cells in the bone marrow. Additionally, increased physical activity or conditions that elevate the demand for oxygen can also trigger enhanced erythropoiesis.
What causes high venous oxygen saturation?
High venous oxygen saturation typically occurs when there is decreased tissue oxygen extraction, such as in states of decreased metabolism (e.g., hypothermia) or decreased oxygen demand (e.g., sedation). It can also happen in conditions with shunting of blood from arterial to venous circulation, such as with certain congenital heart defects.
Is being a pediatrician high or low demand?
HiGh demand.
What single structural characteristic accounts for the resilience of cartilage?
The resilience of cartilage is primarily due to its unique composition of water, collagen, and proteoglycans. The high water content allows cartilage to absorb shock and distribute loads, while the collagen provides strength and structure. The proteoglycans help maintain the cartilage's integrity and flexibility.
