Biology and Immunology Questions

Front

What is bile and where is it stored?

Back

Bile is a digestive fluid produced by the liver and stored in the gallbladder. It aids in the digestion of fats.

Front

What are active and passive immunity?

Back

Active immunity is the immunity that develops after exposure to a pathogen or vaccination, involving the immune system's memory. Passive immunity is the short-term immunity gained through the transfer of antibodies from another source.

Front

What is hydrostatic pressure in the context of the glomerular capillaries?

Back

Hydrostatic pressure is the force exerted by fluid in the glomerular capillaries that drives plasma through the filtration membrane into the capsular space.

Front

What is the nephron loop's role in the kidney?

Back

The nephron loop (loop of Henle) establishes the medullary osmotic gradient, which is crucial for water reabsorption.

Front

Where is pepsinogen secreted and what is its function?

Back

Pepsinogen is an inactive digestive enzyme secreted by the stomach, which is activated to pepsin in the acidic environment of the stomach to help digest proteins.

Front

What is the function of the gallbladder?

Back

The gallbladder stores and concentrates bile produced by the liver until it is needed for digestion.

Front

How does active immunity differ from passive immunity?

Back

Active immunity is long-lasting and involves the immune system's response to pathogens, while passive immunity is temporary and involves the transfer of antibodies.

Front

What is the significance of the efferent arteriole being narrower than the afferent arteriole?

Back

The narrower efferent arteriole increases hydrostatic pressure in the glomerular capillaries, enhancing filtration.

Front

What is the primary role of the collecting duct in the nephron?

Back

The collecting duct is responsible for the final concentration of urine and is influenced by hormones like ADH to regulate water reabsorption.

Front

What is the role of the proximal convoluted tubule?

Back

The proximal convoluted tubule reabsorbs the majority of filtered water, ions, and nutrients back into the bloodstream.