General physiology MCQ 14+

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• The organelles which incorporate a unit membrane are
  ক

  Golgi apparatus

  খ

  Lysosome

  গ

  Actin

  ঘ

  Nuclear envelope

  ঙ

  Ribosome
• Endocytosis is initiated by
  ক

  Coated pits.

  খ

  Clathrin coated vesicles.

  গ

  Non-clathrin coated vesicles.

  ঘ

  Endosomes

  ঙ

  Lysosomes
• Na+- K+ pump
  ক

  Cell volume is maintained.

  খ

  Constant pumping activity is carried out in all cells.

  গ

  Na+ is actively transported into the cell.

  ঘ

  K+ is passively transported into the cell.

  ঙ

  Equal number of Na+ - K+ is transported.
• Secondary active transport
  ক

  Allows the movement of molecules against their electrochemical gradients.

  খ

  Allows the movement of molecules by conformational changes is carrier proteins.

  গ

  Uses energy created by electrochemical gradient.

  ঘ

  Uses cellular ATP.

  ঙ

  Is a form of passive transport.
• During isotonic contraction of skeletal muscle, shortening occur in
  ক

  H band

  খ

  I band

  গ

  Sarcomere

  ঘ

  A band

  ঙ

  M line
• The examples of active transport are
  ক

  Na+- K+ pump in cell membrane

  খ

  Na +- H+ exchange in distal convoluted tubular cells

  গ

  Na+ linked glucose uptake by the enterocytes

  ঘ

  Cl-- HCO3- exchange in RBC membrane

  ঙ

  Na+- K+ leaking in the cell membrane
• Examples of active transport include
  ক

  Na+ reabsorption in the distal tubules of the kidney

  খ

  Ca++ uptake by sarcoplasmic reticulum of muscles

  গ

  Movement of O2 from pulmonary alveoli into blood

  ঘ

  Uptake of LDL cholesterol by the cells

  ঙ

  Chloride shift between RBC and plasma
• Substances entering cells through simple diffusion are
  ক

  Oxygen

  খ

  Carbon dioxide

  গ

  Long chain fatty acid

  ঘ

  Glucose

  ঙ

  Amino acid
• Primary active transport of hydrogen ion proton pump occurs in
  ক

  Gastric glands

  খ

  Cortical collecting ducts of the kidneys

  গ

  Osteoclasts of bone

  ঘ

  Ventricles of the brain

  ঙ

  Capillaries in the lungs
• Weight lifting can result in a dramatic increase in skeletal muscle mass. This increase in muscle mass is attributable to
  ক

  Fusion of a sarcomeres between two adjacent myofibrils

  খ

  Hypertrophy of individual muscle fiber

  গ

  Increase in skeletal muscle blood supply

  ঘ

  Increase in the number of glycolytic enzymes

  ঙ

  Increase in the number of neuromuscular junctions
• Simple diffusion and facilitated diffusion share the following characteristics
  ক

  Do not require ATP

  খ

  Saturation kinetics

  গ

  Transport solute along concentration gradient

  ঘ

  Can be blocked by specific inhibitors

  ঙ

  Require transport protein
• Substances that enter cells by simple diffusion are
  ক

  Oxygen

  খ

  Carbon dioxide

  গ

  Nitrogen

  ঘ

  Glucose

  ঙ

  Aminoacid
• Positive feedback is useful in
  ক

  Blood clotting

  খ

  Child birth

  গ

  Generation of nerve signals

  ঘ

  Regulation of CO2 in ECF

  ঙ

  Regulation of blood pressure
• Inhibition of Na+, K+-ATPase would result in increased
  ক

  Intracellular Ca++ concentration

  খ

  Intracellular Na+ concentration

  গ

  Intracellular K+ concentration

  ঘ

  Na+-glucose cotransport

  ঙ

  Na+-Ca++ counter transport