20
Minutes
30
Questions
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Marking
Q1. A person is able to move his hands and legs but has lost the sense of touch. Which part of the nervous system is affected?
Motor neurons
Sensory neurons
Brain
Spinal cord
Q2. Why do we feel sleepy after a heavy meal?
More blood goes to digestive system
Brain stops working
Body temperature increases
Oxygen level decreases
Q3. In desert plants, stomata open at night and close during day. This adaptation is to:
Prevent water loss through transpiration
Absorb more carbon dioxide
Increase photosynthesis
Avoid predators
Q4. A person has goitre with swelling in the neck. What should be added to his diet?
Iodized salt
More proteins
Vitamin C
Calcium
Q5. Chemical coordination in animals is achieved through:
Nervous system
Hormones secreted by endocrine glands
Both nervous and endocrine systems
Blood circulation only
Q6. The time taken to respond to a stimulus in reflex action is minimum because:
Brain is not involved
Impulse travels very fast
Distance between receptor and effector is small
Spinal cord gives direct command
Q7. A plant placed in a room with light coming from one window. After few days the plant:
Grows straight up
Bends away from window
Bends towards window
Shows no change
Q8. Why are some patients of diabetes treated by giving injections of insulin?
Insulin stimulates pancreas
Insulin increases blood sugar
Insulin converts excess glucose to glycogen
Insulin is destroyed in stomach if taken orally
Q9. The junction between axon of one neuron and dendrite of another neuron is called:
Node
Synapse
Joint
Connection
Q10. A student touched a cactus plant and immediately withdrew his hand. This action is controlled by:
Cerebrum
Cerebellum
Spinal cord
Medulla
Q11. Which gland is called the master gland and why?
Thyroid, controls metabolism
Pituitary, controls other glands
Pancreas, controls blood sugar
Adrenal, controls stress response
Q12. A person cannot maintain balance while walking. Which part of the brain is most likely affected?
Cerebrum
Cerebellum
Medulla
Pons
Q13. The electrical impulse travels in a neuron from:
Dendrite → Axon → Cell body → Axon terminal
Cell body → Dendrite → Axon → Axon terminal
Dendrite → Cell body → Axon → Axon terminal
Axon → Cell body → Dendrite
Q14. If a plant is placed horizontally on the ground, the stem will bend and grow:
Downwards due to positive geotropism
Upwards due to negative geotropism
Horizontally without bending
Randomly in any direction
Q15. A person's pancreas is removed surgically. Which hormone supplement must be given externally?
Thyroxine
Adrenaline
Insulin
Growth hormone
...and 15 more challenging questions available in the interactive simulator.