CSS - PMS - CCE - PCS - General Science
Organs
An insulin deficiency is most directly associated with dysfunction of which organ?
A. Pancreas
B. Liver
C. Spleen
D. Thyroid
Correct Answer: A
Insulin is secreted by beta cells in the pancreatic islets.
CSS - PMS - CCE - PCS - General Science
Organs
Dialysis primarily substitutes for the function of which organs?
A. Lungs
B. Kidneys
C. Liver
D. Pancreas
Correct Answer: B
Dialysis partially replaces the kidneys' role in removing wastes and excess fluid.
CSS - PMS - CCE - PCS - General Science
Organs
Damage to which organ most directly causes jaundice when bilirubin metabolism is impaired?
A. Liver
B. Heart
C. Brain
D. Bladder
Correct Answer: A
The liver processes and excretes bilirubin; dysfunction can lead to jaundice.
CSS - PMS - CCE - PCS - General Science
Organs
Which organ produces intrinsic factor required for vitamin B12 absorption?
A. Stomach
B. Liver
C. Pancreas
D. Colon
Correct Answer: A
Parietal cells of the stomach produce intrinsic factor, essential for vitamin B12 absorption in the ileum.
CSS - PMS - CCE - PCS - General Science
Organs
Which organ is responsible for producing surfactant that prevents alveolar collapse?
A. Lungs
B. Liver
C. Kidneys
D. Pancreas
Correct Answer: A
Type II pneumocytes in the lungs produce pulmonary surfactant.
CSS - PMS - CCE - PCS - General Science
Organs
Which organ is primarily responsible for maintaining blood filtration and electrolyte balance?
A. Kidneys
B. Liver only
C. Spleen
D. Gallbladder
Correct Answer: A
Kidneys regulate electrolytes, fluid volume and remove metabolic wastes.
CSS - PMS - CCE - PCS - General Science
Organs
Which organ converts ammonia into urea?
A. Liver
B. Kidney
C. Lung
D. Stomach
Correct Answer: A
The liver detoxifies ammonia by converting it into urea.
CSS - PMS - CCE - PCS - General Science
Organs
Which organ produces most clotting factors?
A. Liver
B. Kidney
C. Spleen
D. Thyroid
Correct Answer: A
Most coagulation factors are synthesized by the liver.
CSS - PMS - CCE - PCS - General Science
Organs
Which organ produces most plasma proteins such as albumin?
A. Liver
B. Kidney
C. Spleen
D. Pancreas
Correct Answer: A
The liver synthesizes albumin and many other plasma proteins.
CSS - PMS - CCE - PCS - General Science
Organs
Which organ is the main site of red blood cell destruction under normal conditions?
A. Spleen
B. Heart
C. Pancreas
D. Thyroid
Correct Answer: A
The spleen plays a major role in removing aged red blood cells from circulation.
CSS - PMS - CCE - PCS - General Science
Organs
Which organs are primarily responsible for excreting urea from the blood?
A. Kidneys
B. Lungs
C. Skin only
D. Pancreas
Correct Answer: A
The kidneys filter urea from the blood and excrete it in urine.
CSS - PMS - CCE - PCS - General Science
Organs
Which organ is the main site of urea formation?
A. Liver
B. Kidney
C. Stomach
D. Lung
Correct Answer: A
Urea is synthesized mainly in the liver through the urea cycle and later excreted by the kidneys.
CSS - PMS - CCE - PCS - General Science
Organs
Which organ is known as the 'graveyard of red blood cells' in many general science texts?
A. Spleen
B. Kidney
C. Pancreas
D. Thyroid
Correct Answer: A
The spleen removes aged and damaged red blood cells, which is why it is traditionally called the graveyard of RBCs.
CSS - PMS - CCE - PCS - General Science
Organs
Which organ is located in the mediastinum between the lungs?
A. Heart
B. Kidney
C. Spleen
D. Liver
Correct Answer: A
The heart occupies the middle mediastinum between the lungs.
CSS - PMS - CCE - PCS - General Science
Organs
Which organs are located retroperitoneally on the posterior abdominal wall?
A. Kidneys
B. Lungs
C. Heart
D. Ovaries only
Correct Answer: A
The kidneys are retroperitoneal organs situated on the posterior abdominal wall.
CSS - PMS - CCE - PCS - General Science
Organs
Which organ lies behind the stomach and has both digestive and hormonal functions?
A. Pancreas
B. Spleen
C. Thymus
D. Bladder
Correct Answer: A
The pancreas lies retroperitoneally behind the stomach and has exocrine and endocrine roles.
CSS - PMS - CCE - PCS - General Science
Organs
Which membranes protect the brain and spinal cord?
A. Meninges
B. Pleurae
C. Peritoneum
D. Pericardium
Correct Answer: A
The meninges consist of dura mater, arachnoid mater and pia mater.
CSS - PMS - CCE - PCS - General Science
Organs
Which membrane lines much of the abdominal cavity and covers many abdominal organs?
A. Pleura
B. Peritoneum
C. Pericardium
D. Meninges
Correct Answer: B
The peritoneum lines the abdominal cavity and covers many abdominal organs.
CSS - PMS - CCE - PCS - General Science
Organs
Which is the largest and strongest bone in the human body?
A. Humerus
B. Femur
C. Tibia
D. Fibula
Correct Answer: B
The femur is the longest, largest and strongest bone in the human body.
CSS - PMS - CCE - PCS - General Science
Organs
Which bones primarily protect the heart and lungs?
A. Ribs
B. Femur
C. Tibia
D. Radius
Correct Answer: A
The rib cage protects the heart and lungs.