$CATEGORY: Science - Khan Academy/7.Control and Coordination/7.Control and Coordination--Animals-Nervous Sytem

//Multiple Choice

What is the primary function of a reflex action? {
    ~Voluntary movement of muscles
    =Rapid response to a stimulus without conscious thought
    ~Control of body temperature
    ~Release of hormones
}

Which part of the nervous system is primarily involved in reflex actions? {
    ~Brain
    =Spinal cord
    ~Peripheral nerves
    ~Cerebellum
}

Which of the following is an example of a reflex action? {
    ~Thinking about a math problem
    =Moving your hand away from a hot object
    ~Speaking in a conversation
    ~Writing an essay
}

What is the correct sequence of events in a reflex arc? {
    ~Effector → Sensory neuron → Receptor → Motor neuron → Spinal cord
    =Receptor → Sensory neuron → Spinal cord → Motor neuron → Effector
    ~Spinal cord → Receptor → Sensory neuron → Motor neuron → Effector
    ~Motor neuron → Receptor → Spinal cord → Sensory neuron → Effector
}

Which of the following acts as the effector in a reflex arc? {
    ~Sensory neuron
    ~Brain
    =Muscle or gland
    ~Spinal cord
}

//True or False

Reflex actions are always voluntary. {F}

The reflex arc bypasses the brain for faster response. {T}

The effector in a reflex arc is always a muscle. {F}

Reflex actions help the body respond to danger quickly. {T}

The motor neuron carries signals from the receptor to the spinal cord. {F}

//Fill in the blanks

A reflex action is an automatic response to a __________. {
    =Stimulus
    ~Motor neuron
    ~Effector
}

The pathway followed by nerve impulses during a reflex action is called a __________. {
    ~Neural network
    =Reflex arc
    ~Circuit loop
}

The __________ is the part of the reflex arc that receives the stimulus. {
    ~Effector
    =Receptor
    ~Motor neuron
}

In a reflex arc, the __________ neuron transmits the signal from the spinal cord to the effector. {
    ~Sensory
    =Motor
    ~Inter
}

The __________ coordinates the reflex action without involving the brain. {
    ~Peripheral nerves
    =Spinal cord
    ~Cerebellum
}

//Numericals



//Match the following

Match the following items from Column A with their correct corresponding options from Column B\:
{
=Reflex action -> Involuntary and immediate response
=Reflex arc -> Pathway of nerve impulses
=Sensory neuron -> Carries signals to the spinal cord
=Motor neuron -> Carries signals to the effector
=Effector -> Muscle or gland that acts on stimulus
}

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