What is the main function of the nervous system in animals?
a) Digestion
b) Control and coordination
c) Blood circulation
d) Excretion
Answer: b

Which part of the brain is responsible for maintaining posture and balance?
a) Forebrain
b) Midbrain
c) Cerebellum
d) Hypothalamus
Answer: c

What type of receptors detect smell?
a) Gustatory receptors
b) Photoreceptors
c) Olfactory receptors
d) Thermoreceptors
Answer: c

What is a reflex arc?
a) A pathway in the spinal cord for reflex actions
b) A connection in the brain for conscious actions
c) A muscle responsible for reflex actions
d) A sensory receptor for detecting stimuli
Answer: a

How does phototropism occur in plants?
a) By the movement of water in cells
b) Through the synthesis of hormones at the shoot tip
c) Via electrical impulses in plant tissues
d) By contraction of specialized proteins in cells
Answer: b

Which of the following hormones regulates metabolism?
a) Testosterone
b) Thyroxin
c) Insulin
d) Cytokinin
Answer: b

Which plant hormone promotes cell division?
a) Gibberellins
b) Auxins
c) Cytokinins
d) Abscisic acid
Answer: c

What is the main difference between reflex action and voluntary action?
a) Reflex action is slower than voluntary action
b) Reflex action is controlled by the brain
c) Reflex action is involuntary and quick
d) Reflex action requires conscious thinking
Answer: c

Why is iodized salt recommended in the diet?
a) To enhance the immune system
b) To prevent goiter
c) To improve muscle function
d) To increase calcium absorption
Answer: b

What connects the nervous and muscular systems in animals?
a) Hormones
b) Synapse
c) Neurons
d) Reflex arcs
Answer: d

What is the structural and functional unit of the nervous system?
a) Brain
b) Neuron
c) Axon
d) Synapse
Answer: b

What happens at the synapse between two neurons?
a) Nerve impulses are converted to chemical signals.
b) Nerve impulses stop.
c) Nerve impulses change direction.
d) Nerve impulses bypass the brain.
Answer: a

Which part of the neuron receives information?
a) Axon
b) Dendrite
c) Synapse
d) Myelin sheath
Answer: b

Which type of movement in plants is independent of growth?
a) Tropic movements
b) Phototropism
c) Seismonastic movements
d) Geotropism
Answer: c

What is the primary function of adrenaline in animals?
a) Promote growth
b) Stimulate digestion
c) Prepare the body for fight or flight
d) Regulate blood sugar levels
Answer: c

Which hormone regulates blood sugar levels in the body?
a) Thyroxin
b) Insulin
c) Testosterone
d) Adrenaline
Answer: b

What part of the brain is responsible for thinking?
a) Midbrain
b) Cerebellum
c) Forebrain
d) Hindbrain
Answer: c

Which plant hormone is responsible for growth in stem length?
a) Gibberellins
b) Auxins
c) Cytokinins
d) Abscisic acid
Answer: a

How does the sensitive plant (Mimosa pudica) respond to touch?
a) By secreting hormones
b) By sending electrical impulses
c) By changing water content in cells
d) By rapid growth
Answer: c

Which structure protects the human brain?
a) Skull
b) Spinal cord
c) Cerebrospinal fluid
d) Both a and c
Answer: d

Which part of the nervous system controls reflex actions?
a) Brain
b) Spinal cord
c) Peripheral nerves
d) Forebrain
Answer: b

What is the role of auxin in phototropism?
a) Inhibits cell growth
b) Stimulates growth on the shaded side
c) Promotes water absorption
d) Affects cell division
Answer: b

Which endocrine gland secretes adrenaline?
a) Thyroid
b) Adrenal gland
c) Pancreas
d) Pituitary gland
Answer: b

How are hormones transported in the human body?
a) By nerves
b) Through blood
c) By lymphatic vessels
d) By synapses
Answer: b

What is the full form of CNS in the nervous system?
a) Central Nervous System
b) Cerebral Nervous System
c) Coordinated Nerve Signal
d) Cranial Nerve System
Answer: a

What triggers a reflex action?
a) Brain thinking
b) Environmental stimulus
c) Hormonal changes
d) Voluntary action
Answer: b

Which hormone is responsible for cell division in plants?
a) Gibberellins
b) Auxins
c) Cytokinins
d) Abscisic acid
Answer: c

How is the movement of tendrils in plants caused?
a) By chemical signals in the stem
b) By uneven growth on different sides
c) By electrical impulses
d) By water absorption
Answer: b

What is the role of the medulla in the human brain?
a) Thinking
b) Maintaining posture
c) Controlling involuntary actions
d) Regulating hunger
Answer: c

Which type of receptors detect taste?
a) Olfactory receptors
b) Gustatory receptors
c) Photoreceptors
d) Thermoreceptors
Answer: b

How does adrenaline prepare the body for emergencies?
a) By slowing the heart rate
b) By dilating blood vessels in the digestive system
c) By increasing oxygen supply to muscles
d) By promoting sleep
Answer: c

What is the term for the junction between two neurons?
a) Axon
b) Dendrite
c) Synapse
d) Nerve impulse
Answer: c

Which hormone is involved in controlling blood sugar levels?
a) Adrenaline
b) Insulin
c) Thyroxin
d) Estrogen
Answer: b

What protects the spinal cord in humans?
a) Skull
b) Rib cage
c) Vertebral column
d) Cerebrospinal fluid
Answer: c

Which part of the hindbrain controls voluntary actions?
a) Medulla
b) Cerebellum
c) Midbrain
d) Hypothalamus
Answer: b

Which hormone is responsible for regulating metabolism?
a) Insulin
b) Thyroxin
c) Estrogen
d) Adrenaline
Answer: b

What happens if auxin accumulates on the shaded side of a plant?
a) The plant stops growing.
b) The shaded side grows faster.
c) The plant bends away from the light.
d) The plant bends toward gravity.
Answer: b

How are endocrine glands different from exocrine glands?
a) Endocrine glands release hormones into ducts.
b) Endocrine glands release hormones directly into the blood.
c) Endocrine glands do not produce hormones.
d) Endocrine glands control reflex actions.
Answer: b

What is the primary function of cytokinins in plants?
a) Inhibit growth
b) Promote fruit ripening
c) Stimulate cell division
d) Promote water loss
Answer: c

What is the function of sensory neurons?
a) Transmit impulses from the brain to muscles
b) Detect stimuli and transmit signals to the brain
c) Control voluntary actions
d) Release hormones
Answer: b

Which part of the brain regulates hunger and thirst?
a) Cerebellum
b) Hypothalamus
c) Medulla
d) Cerebrum
Answer: b

What is the role of abscisic acid in plants?
a) Promote cell division
b) Inhibit growth
c) Stimulate flowering
d) Encourage water absorption
Answer: b

Which organ releases insulin?
a) Liver
b) Adrenal gland
c) Pancreas
d) Thyroid
Answer: c

What happens during geotropism in plants?
a) Shoots grow towards light.
b) Roots grow towards gravity.
c) Shoots grow away from gravity.
d) Both b and c.
Answer: d

What is the function of motor neurons?
a) Carry signals to the brain
b) Transmit impulses to muscles
c) Detect environmental stimuli
d) Regulate involuntary actions
Answer: b

What is the purpose of cerebrospinal fluid?
a) Transmit electrical impulses
b) Protect the brain from shocks
c) Control reflex actions
d) Promote oxygen supply to the brain
Answer: b

Which part of the neuron transmits signals away from the cell body?
a) Dendrite
b) Synapse
c) Axon
d) Receptors
Answer: c

What is hydrotropism?
a) Movement towards gravity
b) Movement towards light
c) Movement towards water
d) Movement towards heat
Answer: c

What is the role of the pituitary gland?
a) Regulate blood sugar
b) Control growth and development
c) Maintain water balance
d) Stimulate digestion
Answer: b

Which hormone controls puberty in males?
a) Thyroxin
b) Testosterone
c) Insulin
d) Estrogen
Answer: b

Which part of the nervous system is involved in reflex actions?
a) Spinal cord
b) Cerebellum
c) Hypothalamus
d) Cerebrum
Answer: a

What is the role of gibberellins in plants?
a) Promote flowering
b) Inhibit growth
c) Promote stem elongation
d) Control water loss
Answer: c

Which hormone is responsible for the development of female reproductive organs?
a) Thyroxin
b) Testosterone
c) Estrogen
d) Insulin
Answer: c

What is the main function of the cerebrum?
a) Maintaining posture
b) Controlling involuntary actions
c) Thinking and voluntary actions
d) Reflex coordination
Answer: c

Which part of the brain controls the rate of heartbeat?
a) Cerebrum
b) Cerebellum
c) Medulla
d) Hypothalamus
Answer: c

What happens to plant cells when auxin is concentrated on one side?
a) They grow longer.
b) They shrink.
c) They stop dividing.
d) They die.
Answer: a

What is the function of the peripheral nervous system?
a) Process information from sense organs
b) Send signals to voluntary muscles
c) Connect the central nervous system to the rest of the body
d) Regulate reflex arcs
Answer: c

What type of action is breathing classified as?
a) Reflex action
b) Voluntary action
c) Involuntary action
d) Both involuntary and reflex action
Answer: d

What is chemotropism?
a) Response to light
b) Response to water
c) Response to chemicals
d) Response to gravity
Answer: c

Which part of the brain coordinates voluntary actions?
a) Cerebellum
b) Hypothalamus
c) Midbrain
d) Medulla
Answer: a

What is the function of adrenaline during a stressful situation?
a) Increase heart rate
b) Decrease blood pressure
c) Stimulate digestion
d) Promote sleep
Answer: a

Which hormone regulates carbohydrate metabolism?
a) Adrenaline
b) Thyroxin
c) Insulin
d) Estrogen
Answer: b

What is the gap between two neurons called?
a) Axon terminal
b) Synapse
c) Dendrite
d) Myelin gap
Answer: b

Which part of the brain controls blood pressure?
a) Cerebellum
b) Hypothalamus
c) Medulla
d) Cerebrum
Answer: c

Which hormone is responsible for regulating the menstrual cycle in females?
a) Estrogen
b) Testosterone
c) Insulin
d) Adrenaline
Answer: a

How does light affect the growth of shoots in plants?
a) It inhibits growth.
b) It causes even growth on all sides.
c) It promotes faster growth on the shaded side.
d) It promotes growth on the lighted side.
Answer: c

What protects the brain from mechanical shocks?
a) Skull
b) Cerebrospinal fluid
c) Both a and b
d) Spinal cord
Answer: c

What does the spinal cord do in reflex actions?
a) Processes sensory inputs.
b) Directly connects sensory and motor neurons.
c) Sends signals to the brain.
d) Controls voluntary actions.
Answer: b

Which plant hormone helps in ripening of fruits?
a) Auxins
b) Ethylene
c) Cytokinins
d) Abscisic acid
Answer: b

Which gland is known as the “master gland”?
a) Thyroid gland
b) Pituitary gland
c) Adrenal gland
d) Pancreas
Answer: b

How do plant cells change shape during movement?
a) By electrical signals
b) By absorbing water
c) By producing auxin
d) By dividing rapidly
Answer: b

Which hormone prepares the body for emergencies?
a) Insulin
b) Thyroxin
c) Adrenaline
d) Testosterone
Answer: c

What is a reflex arc?
a) Pathway of voluntary actions
b) A quick pathway for reflexes
c) Hormonal response mechanism
d) Pathway for muscle growth
Answer: b

What part of the brain regulates body temperature?
a) Cerebrum
b) Medulla
c) Hypothalamus
d) Cerebellum
Answer: c

Which hormone promotes growth in plants?
a) Abscisic acid
b) Ethylene
c) Gibberellins
d) Cytokinins
Answer: c

What is the function of insulin?
a) Regulate blood sugar levels
b) Promote growth
c) Control reflexes
d) Stimulate metabolism
Answer: a

Which hormone inhibits growth in plants?
a) Auxins
b) Cytokinins
c) Gibberellins
d) Abscisic acid
Answer: d

What are gustatory receptors responsible for?
a) Detecting smell
b) Detecting taste
c) Detecting light
d) Detecting temperature
Answer: b

Which system transmits electrical impulses?
a) Nervous system
b) Endocrine system
c) Digestive system
d) Excretory system
Answer: a

What controls involuntary actions like heartbeat?
a) Cerebrum
b) Medulla
c) Cerebellum
d) Forebrain
Answer: b

What does the cerebellum control?
a) Thinking
b) Posture and balance
c) Reflex actions
d) Blood pressure
Answer: b

What is the role of thyroxin?
a) Control blood sugar
b) Regulate metabolism
c) Increase heart rate
d) Stimulate digestion
Answer: b

What does the endocrine system use to send signals?
a) Electrical impulses
b) Hormones
c) Neurons
d) Reflex arcs
Answer: b

Which type of neuron transmits signals from sense organs to the brain?
a) Sensory neurons
b) Motor neurons
c) Interneurons
d) Reflex neurons
Answer: a

What is the primary function of auxins in plants?
a) Stimulate cell elongation
b) Control water absorption
c) Promote seed germination
d) Inhibit growth
Answer: a

What is the target tissue for adrenaline?
a) Only heart tissue
b) All tissues in the body
c) Only muscle tissues
d) Only brain tissues
Answer: b

What causes the movement of Mimosa leaves?
a) Hormones
b) Electrical impulses
c) Changes in water content
d) Rapid cell division
Answer: c

What does the forebrain primarily do?
a) Controls balance
b) Controls involuntary actions
c) Processes sensory inputs and thinking
d) Coordinates reflex actions
Answer: c

What does the cerebrum handle?
a) Reflex actions
b) Voluntary actions
c) Involuntary actions
d) Hormonal release
Answer: b

Which hormone regulates sleep-wake cycles?
a) Adrenaline
b) Melatonin
c) Estrogen
d) Thyroxin
Answer: b

How do hormones travel in plants?
a) Through ducts
b) By diffusion
c) By nerve signals
d) Through the spinal cord
Answer: b

What regulates sugar levels in diabetes patients?
a) Insulin injections
b) Thyroxin supplements
c) Testosterone
d) Adrenaline
Answer: a

What are involuntary actions controlled by?
a) Cerebrum
b) Cerebellum
c) Medulla and spinal cord
d) Forebrain
Answer: c

Which hormone causes growth spurts in teenagers?
a) Adrenaline
b) Growth hormone
c) Thyroxin
d) Insulin
Answer: b

Which hormone is deficient in goiter?
a) Thyroxin
b) Insulin
c) Estrogen
d) Adrenaline
Answer: a

What is the function of the adrenal glands?
a) Regulate heartbeat
b) Release adrenaline
c) Stimulate growth
d) Control digestion
Answer: b

Which cells detect light in the human eye?
a) Photoreceptors
b) Gustatory receptors
c) Olfactory receptors
d) Reflex receptors
Answer: a

What is the function of growth hormone?
a) Regulate blood sugar
b) Promote cell elongation in plants
c) Stimulate overall body growth
d) Control reflexes
Answer: c

What connects the brain and the spinal cord?
a) Midbrain
b) Cerebellum
c) Medulla
d) Cerebrum
Answer: c

What enables plants to respond to gravity?
a) Geotropism
b) Phototropism
c) Chemotropism
d) Hydrotropism
Answer: a