20
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30
Questions
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Marking
Q1. Q1. A person accidentally touches a hot plate. He immediately pulls his hand away. What is the correct pathway of the reflex arc in this case?
Receptor â Motor neuron â Spinal cord â Sensory neuron â Effector
Receptor â Sensory neuron â Spinal cord â Motor neuron â Effector
Receptor â Spinal cord â Sensory neuron â Motor neuron â Effector
Receptor â Brain â Motor neuron â Effector
Q2. Q2. A patient has suffered damage to the cerebellum due to an accident. Which function will be most affected?
Memory and intelligence
Posture and balance
Vision and hearing
Breathing and heart rate
Q3. Q3. If the dendrites of a neuron are damaged, which function will be impaired?
Transmission of impulses away from cell body
Reception of information from other neurons
Release of neurotransmitters
Generation of nerve impulses
Q4. Q4. During an emergency situation, a person's heart beats faster and pupils dilate. Which hormone is responsible?
Insulin
Thyroxine
Adrenaline
Growth hormone
Q5. Q5. A plant's shoot bends towards light while the root bends away from light. This is an example of:
Positive phototropism in both
Negative phototropism in both
Positive phototropism in shoot and negative in root
Negative phototropism in shoot and positive in root
Q6. Q6. A person suffered a spinal cord injury. His reflex actions are normal but voluntary actions are affected. Which part is damaged?
Spinal cord completely severed
Connection between spinal cord and brain
Only brain
Peripheral nerves
Q7. Q7. Why is the response of plants slower than animals?
Plants do not have nervous system
Plants have chemical coordination only
Plant cells do not move
Both A and B
Q8. Q8. A diabetic patient takes insulin injection. Why is insulin not given orally?
It tastes bad
It is a protein and will be digested in stomach
It is expensive
It causes stomach ulcers
Q9. Q9. If iodine is deficient in diet, which gland and hormone will be affected?
Pituitary gland and growth hormone
Thyroid gland and thyroxine
Pancreas and insulin
Adrenal gland and adrenaline
Q10. Q10. A potted plant is placed horizontally. After a few days, the shoot will:
Grow horizontally
Grow downwards
Grow upwards showing negative geotropism
Stop growing
Q11. Q11. Synapse is the junction between:
Two neurons
Neuron and muscle
Two muscles
Both A and B
Q12. Q12. A person's blood sugar level is always high even after taking insulin. What could be the reason?
Insulin receptors on cells are not working
Pancreas is not producing insulin
Liver is producing excess glucose
Person is eating too much sugar
Q13. Q13. What is the main difference between reflex action and walking?
Reflex action is involuntary while walking is voluntary
Reflex is controlled by brain while walking by spinal cord
Reflex is slow while walking is fast
No difference
Q14. Q14. The gap between two neurons is called synapse. What is present in this gap?
Air
Neurotransmitters
Blood
Lymph
Q15. Q15. A student observed that a touch-me-not plant closes its leaves when touched. This movement is due to:
Growth of cells
Changes in turgor pressure
Phototropism
Geotropism
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