1.4.3 Cholesterol

    Cards (50)

    • What substance synthesized from cholesterol aids in fat digestion?
      Bile acids
    • Cholesterol helps maintain membrane fluidity under different temperature conditions.
    • At low temperatures, cholesterol prevents close packing of fatty acid tails, increasing membrane fluidity.
    • What type of lipid is cholesterol?
      Steroid
    • Cholesterol contributes to the rigidity and fluidity of cell membranes.
    • Cholesterol is involved in the synthesis of steroid hormones like estrogen and testosterone.
    • What are the two main forms of lipoproteins that transport cholesterol in the blood?
      LDL and HDL
    • The steroid nucleus in cholesterol is made of four fused carbon rings.
    • Where is the hydroxyl group attached in the cholesterol structure?
      Ring A, position 3
    • The hydroxyl group in cholesterol allows it to interact with water due to its polarity.
    • What is the role of cholesterol in cell membranes at low temperatures?
      Increases fluidity
    • Match the lipoprotein with its role and effect on heart health:
      LDL ↔️ Transports cholesterol from liver to tissues; high levels increase heart disease risk
      HDL ↔️ Transports cholesterol from tissues to liver; high levels reduce heart disease risk
    • Order the effects of cholesterol on membrane fluidity under different temperature conditions:
      1️⃣ Low temperature: Prevents close packing of fatty acid tails
      2️⃣ Low temperature: Increases membrane fluidity
      3️⃣ High temperature: Interacts with phospholipid tails
      4️⃣ High temperature: Decreases membrane fluidity
    • Which steroid hormone is cholesterol a precursor for?
      Testosterone
    • Cholesterol is essential for maintaining the rigidity and fluidity of cell membranes.
    • What type of hormones is cholesterol a precursor for?
      Steroid hormones
    • At high temperatures, cholesterol interacts with phospholipid tails to decrease membrane fluidity.
    • What health risks are associated with high cholesterol levels?
      Cardiovascular disease and stroke
    • LDL transports cholesterol from the liver to tissues.
    • Cholesterol maintains the rigidity and fluidity of cell membranes
    • What are the two properties of cell membranes that cholesterol helps maintain?
      Rigidity and fluidity
    • Arrange the effects of cholesterol on membrane fluidity at different temperatures:
      1️⃣ Low temperature: Prevents close packing of fatty acid tails
      2️⃣ Low temperature: Increases membrane fluidity
      3️⃣ High temperature: Interacts with phospholipid tails
      4️⃣ High temperature: Decreases membrane fluidity
    • High cholesterol is linked to increased cardiovascular disease and stroke
    • High levels of HDL are protective against heart disease.
    • Match the lipoprotein with its function and health impact:
      LDL ↔️ Transports cholesterol to tissues ||| High levels increase plaque buildup
      HDL ↔️ Transports cholesterol to the liver ||| High levels reduce heart disease risk
    • LDL transports cholesterol from the liver to tissues
    • What is the primary function of HDL cholesterol?
      Remove cholesterol from tissues
    • LDL is commonly referred to as "bad cholesterol" because it increases the risk of heart disease.
    • Cholesterol is a type of lipid that functions as a steroid
    • Match the component of cholesterol with its description and function:
      Steroid Nucleus ↔️ Four fused carbon rings ||| Forms the backbone
      Hydroxyl Group (-OH) ↔️ -OH attached to ring A ||| Provides polarity
      Alkyl Side Chain ↔️ Fatty chain attached to ring D ||| Contributes to hydrophobic properties
    • What role does cholesterol play in cell membrane structure?
      Maintains rigidity and fluidity
    • Cholesterol is a precursor to steroid hormones such as estrogen and testosterone.
    • Cholesterol is used by the liver to produce bile acids, which aid in fat digestion
    • What two properties does cholesterol help maintain in cell membranes?
      Rigidity and fluidity
    • At low temperatures, cholesterol prevents the close packing of fatty acid tails, which increases membrane fluidity.
    • What does cholesterol ensure by maintaining membrane fluidity?
      Proper functioning of cells
    • At high temperatures, cholesterol interacts with phospholipid tails to increase membrane fluidity.
      False
    • What is the term for cholesterol deposits in arterial walls that increase the risk of heart disease?
      Arteriosclerosis
    • LDL carries cholesterol from the liver to tissues, while HDL transports it back to the liver for excretion.
    • Maintaining balanced LDL and HDL levels is crucial for cardiovascular health.