Human Body
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Excretory System (Kidneys, Nephron)
SubtopicExcretory System (Kidneys, Nephron) under Human Body for Grade 7 ICSE.
Preview questions (no answers)
- 1.
Which of these is the correct path for blood entering the kidney?
A.Aorta to Renal Artery
B.Vena cava to Renal Vein
C.Ureter to Kidney
D.Bladder to Urethra
- 2.
What is the approximate capacity of the adult urinary bladder when full?
A.10 liters
B.0.5 liters
C.5 liters
D.0.01 liters
- 3.
Which of these waste products is excreted through the skin as well as the kidneys?
A.Carbon dioxide
B.Excess salts
C.Undigested food
D.Oxygen
- 4.
Where does the filtration of blood actually occur within the kidney?
A.In the ureter
B.In the nephrons
C.In the bladder
D.In the renal vein
- 5.
Which gland is situated like a cap on the top of each kidney, though it is not part of the excretory system?
A.Thyroid gland
B.Adrenal gland
C.Pituitary gland
D.Pancreas
- 6.
How do the kidneys contribute to maintaining the body's internal pH level?
A.By exhaling carbon dioxide
B.By secreting or reabsorbing hydrogen ions ()
C.By producing bile
D.By breaking down glycogen
- 7.
What role does the sphincter muscle play at the junction of the urinary bladder and urethra?
A.It filters urine one last time
B.It controls the release of urine from the bladder
C.It produces urine
D.It reabsorbs salt into the body
- 8.
During micturition, which of the following events occurs simultaneously?
A.Contraction of the detrusor muscle and relaxation of the urethral sphincters.
B.Relaxation of the detrusor muscle and contraction of the urethral sphincters.
C.Contraction of both the detrusor muscle and the urethral sphincters.
D.Closure of the ureters and opening of the renal pelvis.
- 9.
Which of the following is NOT a true function of the kidney in maintaining homeostasis?
A.Regulation of blood pH
B.Regulation of water balance (osmoregulation)
C.Production of urea from ammonia
D.Regulation of electrolyte concentration
- 10.
Identify the correct anatomical relationship:
A.The ureter is the tube that carries urine from the bladder to the outside.
B.The urethra is the tube that carries urine from the kidney to the bladder.
C.The renal artery carries oxygenated, waste-rich blood to the kidney.
D.The renal vein carries deoxygenated, waste-rich blood away from the kidney.
Download the worksheet for Human Body - Excretory System (Kidneys, Nephron) to practice offline. It includes additional chapter-level practice questions.
Nervous System (Brain, Spinal Cord, Neurons)
SubtopicNervous System (Brain, Spinal Cord, Neurons) under Human Body for Grade 7 ICSE.
Preview questions (no answers)
- 1.
What type of nerve is the optic nerve?
A.Motor
B.Sensory
C.Mixed
D.Cranial-Motor
- 2.
The spinal cord is protected by the vertebral column, which is made of 33 small bones called:
A.Ribs
B.Carpals
C.Vertebrae
D.Femurs
- 3.
Which of these acts as the receptor organ in a reflex arc when we touch a hot plate?
A.Muscles
B.Spinal cord
C.Skin
D.Motor nerve
- 4.
The space through which a neurotransmitter moves to reach the next neuron is the:
A.Axon terminal
B.Synaptic cleft
C.Cell membrane
D.Myelin gap
- 5.
In the human peripheral nervous system, nerves are classified based on where they originate. According to the classification shown in the diagram, what is the correct number of pairs represented by 'X'?
A.33 pairs
B.12 pairs
C.31 pairs
D.10 pairs
- 6.
Where does the brain meet the spinal cord?
A.At the base of the skull
B.At the top of the cerebrum
C.In the middle of the neck
D.Behind the eyes
- 7.
Which of the following is an effector organ?
A.Skin
B.Eye
C.Muscle
D.Ear
- 8.
Which of these correctly describes the 'Myelin Sheath'?
A.A continuous layer of protein covering the dendrites.
B.A fatty, insulating layer found around many axons.
C.The outer membrane of the brain.
D.The fluid-filled space between the skull and the brain.
- 9.
If a person's Cerebrum is injured, they would most likely lose the ability to:
A.Breathe automatically.
B.Balance while standing.
C.Remember their own name.
D.Circulate blood through the body.
- 10.
What is the primary role of the 'Thalamus' in the human brain?
A.Regulating muscle tone and posture.
B.Acting as a relay station for sensory impulses to the cerebrum.
C.Controlling the secretion of tears.
D.Executing the command for reflex actions.
Download the worksheet for Human Body - Nervous System (Brain, Spinal Cord, Neurons) to practice offline. It includes additional chapter-level practice questions.
Preview questions (no answers)
- 1.
The automatic withdrawal of a limb from a painful stimulus is often called a:
A.Pain reflex
B.Withdrawal reflex
C.Push reflex
D.Stretch reflex
- 2.
If you step on a sharp object, the impulse travels through which neuron first?
A.Motor neuron
B.Sensory neuron
C.Relay neuron
D.Effector neuron
- 3.
Which part of the reflex arc is the last to receive the electrical impulse?
A.Sensory neuron
B.Relay neuron
C.Motor neuron
D.Effector
- 4.
What triggers the 'startle reflex' in an infant?
A.A soft touch
B.A sudden loud noise
C.Eating food
D.Sleeping
- 5.
Which of the following factors does NOT affect the speed of a reflex action?
A.The length of the reflex arc
B.The number of synapses involved
C.The person's level of conscious concentration
D.The presence of a myelin sheath on the neurons
- 6.
Which sequence correctly tracks an impulse after it leaves the in the spinal cord?
A.Relay neuron -> Motor neuron -> Muscle
B.Relay neuron -> Sensory neuron -> Skin
C.Relay neuron -> Brain -> Motor neuron
D.Relay neuron -> Receptor -> Effector
- 7.
When a bright light is shone into the eye, the of the iris contract. This is a:
A.Conditioned reflex
B.Spinal reflex
C.Cerebral reflex
D.Voluntary action
- 8.
A person is born without the ability to perform any 'Inborn Reflexes'. What is the most likely cause?
A.A genetic defect in the development of the spinal cord or peripheral nerves.
B.A lack of schooling or environmental exposure.
C.Failure of the cerebral cortex to develop.
D.A blockage in the digestive system affecting energy.
- 9.
What is the biological significance of the 'synaptic delay' in a reflex arc?
A.It is the time taken for neurotransmitters to diffuse across the gap between neurons.
B.It is the time required for the muscle to physically move.
C.It is the time the brain takes to approve the reflex action.
D.It is the time used by the myelin sheath to recharge the impulse.
- 10.
Which of the following describes the correct orientation of a 'Sensory Neuron'?
A.Dendrites at the receptor, cell body in the dorsal root ganglion, axon terminal in the spinal cord.
B.Dendrites in the spinal cord, cell body in the ventral root, axon terminal at the muscle.
C.Dendrites at the muscle, cell body in the brain, axon terminal in the spinal cord.
D.Dendrites in the brain, cell body in the spinal cord, axon terminal at the receptor.
Download the worksheet for Human Body - Reflex Actions to practice offline. It includes additional chapter-level practice questions.