Asked by Miguel Vargas on Jul 26, 2024
Verified
A cell needs a receptor in order to absorb LDLs. A disease that interferes with the functioning of these LDL receptors would
A) increase serum cholesterol levels.
B) decrease serum cholesterol levels.
C) halt endocytosis.
D) promote endocytosis.
E) have no effect on serum cholesterol or endocytosis.
LDL Receptors
Proteins on cell surfaces that bind and internalize low-density lipoprotein (LDL) particles for degradation.
Serum Cholesterol
The total amount of cholesterol present in the serum portion of the blood, which is a key indicator in assessing an individual's risk for cardiovascular diseases.
Endocytosis
Bulk uptake of material through the cell membrane.
- Clarify the contribution of lipoproteins to the transport and breakdown of cholesterol.
- Gain an insight into the molecular principles governing nutrient absorption at the cellular level.
Verified Answer
FM
Fakhir MughalJul 31, 2024
Final Answer :
A
Explanation :
LDL receptors on cell surfaces are crucial for the uptake of LDL (low-density lipoprotein), which contains cholesterol. If these receptors are not functioning properly due to a disease, the cells cannot absorb LDL from the bloodstream efficiently, leading to increased levels of LDL and thus cholesterol in the blood serum.
Learning Objectives
- Clarify the contribution of lipoproteins to the transport and breakdown of cholesterol.
- Gain an insight into the molecular principles governing nutrient absorption at the cellular level.