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CSS - PMS - CCE - PCS - General Science Practice

Human Organs – Major Organs, Functions, Systems & Important Facts MCQs

Study the major organs of the human body, their locations, functions and related organ systems. This topic covers the heart, brain, lungs, liver, kidneys, stomach, intestines, pancreas, spleen, skin and other important organs. Specially prepared for CSS, PMS, CCE, PCS, FPSC, PPSC and General Science competitive exams with exam-focused facts and MCQs.

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Human Organs – Major Organs, Functions, Systems & Important Facts

Human Organs – Major Organs, Functions, Systems & Important Facts MCQs With Answers

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CSS - PMS - CCE - PCS - General Science Organs
Which part of the inner ear is primarily responsible for hearing?
A. Cochlea
B. Semicircular canals
C. Eustachian tube
D. Pinna
Read Theory
Correct Answer: A
The cochlea converts sound vibrations into nerve impulses.
CSS - PMS - CCE - PCS - General Science Organs
Which organ is responsible for hearing and balance?
A. Eye
B. Ear
C. Nose
D. Tongue
Read Theory
Correct Answer: B
The inner ear contains structures for both hearing and equilibrium.
CSS - PMS - CCE - PCS - General Science Organs
Which transparent structure focuses light onto the retina?
A. Lens
B. Sclera
C. Choroid
D. Optic disc
Read Theory
Correct Answer: A
The lens changes shape to focus light on the retina.
CSS - PMS - CCE - PCS - General Science Organs
Which part of the eye contains photoreceptor cells?
A. Cornea
B. Retina
C. Lens
D. Iris
Read Theory
Correct Answer: B
The retina contains rods and cones, the photoreceptor cells.
CSS - PMS - CCE - PCS - General Science Organs
Which part of the eye controls the amount of light entering?
A. Retina
B. Iris
C. Optic nerve
D. Sclera
Read Theory
Correct Answer: B
The iris adjusts pupil diameter and therefore regulates incoming light.
CSS - PMS - CCE - PCS - General Science Organs
Which organ is responsible for vision?
A. Ear
B. Eye
C. Nose
D. Tongue
Read Theory
Correct Answer: B
The eye receives and focuses light and converts it into neural signals for vision.
CSS - PMS - CCE - PCS - General Science Organs
Where do sperm mature and become motile after leaving the testes?
A. Epididymis
B. Prostate
C. Urethra
D. Seminal vesicle
Read Theory
Correct Answer: A
Sperm mature and are stored in the epididymis.
CSS - PMS - CCE - PCS - General Science Organs
Which male organ contributes fluid to semen and lies below the bladder?
A. Prostate gland
B. Thyroid gland
C. Adrenal gland
D. Pituitary gland
Read Theory
Correct Answer: A
The prostate lies below the bladder and contributes secretions to semen.
CSS - PMS - CCE - PCS - General Science Organs
Fertilization usually occurs in which organ?
A. Uterus
B. Fallopian tube
C. Ovary
D. Cervix
Read Theory
Correct Answer: B
Fertilization most commonly occurs in the ampullary region of the fallopian tube.
CSS - PMS - CCE - PCS - General Science Organs
In which organ does a fetus normally develop?
A. Ovary
B. Uterus
C. Cervix
D. Vagina
Read Theory
Correct Answer: B
The uterus supports implantation and fetal development.
CSS - PMS - CCE - PCS - General Science Organs
Which female reproductive organs produce ova and estrogen?
A. Uterus
B. Ovaries
C. Cervix
D. Fallopian tubes
Read Theory
Correct Answer: B
The ovaries produce ova and secrete hormones including estrogen and progesterone.
CSS - PMS - CCE - PCS - General Science Organs
Which male reproductive organs produce sperm and testosterone?
A. Prostate glands
B. Testes
C. Seminal vesicles
D. Epididymides
Read Theory
Correct Answer: B
The testes produce sperm and secrete testosterone.
CSS - PMS - CCE - PCS - General Science Organs
Where is urine initially collected after formation within the kidney?
A. Renal pelvis
B. Urethra
C. Bladder
D. Prostate
Read Theory
Correct Answer: A
Urine drains through calyces into the renal pelvis before entering the ureter.
CSS - PMS - CCE - PCS - General Science Organs
Which organ activates vitamin D to its hormonally active form?
A. Kidney
B. Spleen
C. Stomach
D. Gallbladder
Read Theory
Correct Answer: A
The kidney converts vitamin D to calcitriol, its active hormonal form.
CSS - PMS - CCE - PCS - General Science Organs
Which kidney-produced hormone stimulates red blood cell production?
A. Insulin
B. Erythropoietin
C. Thyroxine
D. Aldosterone
Read Theory
Correct Answer: B
The kidneys produce erythropoietin, which stimulates red blood cell production in bone marrow.
CSS - PMS - CCE - PCS - General Science Organs
Which organ helps regulate acid-base balance by excreting hydrogen ions and conserving bicarbonate?
A. Kidneys
B. Spleen
C. Gallbladder
D. Skin only
Read Theory
Correct Answer: A
The kidneys play a major role in long-term regulation of acid-base balance.
CSS - PMS - CCE - PCS - General Science Organs
Which tube carries urine from the bladder to the outside of the body?
A. Ureter
B. Urethra
C. Renal artery
D. Vas deferens
Read Theory
Correct Answer: B
The urethra conducts urine from the bladder to the exterior.
CSS - PMS - CCE - PCS - General Science Organs
Which tubes carry urine from the kidneys to the bladder?
A. Urethra
B. Ureters
C. Bronchi
D. Bile ducts
Read Theory
Correct Answer: B
The ureters transport urine from each kidney to the urinary bladder.
CSS - PMS - CCE - PCS - General Science Organs
Which blood vessels carry blood to the kidneys?
A. Renal arteries
B. Renal veins
C. Pulmonary arteries
D. Hepatic veins
Read Theory
Correct Answer: A
Renal arteries deliver blood from the abdominal aorta to the kidneys.
CSS - PMS - CCE - PCS - General Science Organs
What is the functional unit of the kidney?
A. Neuron
B. Nephron
C. Alveolus
D. Hepatocyte
Read Theory
Correct Answer: B
The nephron is the microscopic functional unit responsible for filtration and urine formation.
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