Reflex Arc

Q.

Reflex action in the body is controlled by ___________.

1. ANS

2. CNS

3. PNS

4. All of these

Q.

Any change in the environment to which an organism responds is called

1. Stimulus

2. Tropism

3. Tonocity

4. Response

Q.

The neuron which carries nerve impulse from receptors to spinal cord is ________.

1. motor neuron

2. relay neuron

3. afferent neuron

4. efferent neuron

Q.

Fill in the blanks:

The spinal cord is the center of ______action.

Q.

Classify the following actions as simple reflex or conditioned reflex:

1. Playing the guitar.
2. Removing your hand suddenly when pricked by a thorn.
3. Applying brakes suddenly when a dog crosses the path.
4. Blinking of eyelids on exposure to light.
5. Tying one’s shoelace.

Q.

The cyton of reflex in central nervous system and autonomic nervous system is

1. Motor

2. Mixed

3. Sensory

4. All of these

Q.

In a reflex arc, ______________ connects different neurons together and sends the signal from one neuron to another.

1. Interneuron

2. Motor Neuron

3. Sensory Neuron

4. Synapse

Q.

The function of reflex arcs and reflex action mechanism is primarily to ___________.

1. get faster response

2. maintain homeostasis

3. decrease burden of handling more nerve impulses on brain

4. All of these

Q.

Reflex arc is ____.

1. instantaneous response without thought

2. pathway of impulses to and from spinal cord

3. pathway of impulse to effector organs

4. response to external stimuli

Q. What forms the main path for the impulses, from and to the brain in a reflex action?

1. Nerves
2. Spinal cord
3. Muscles
4. All of the above

Q.

Label the following diagram:

1. 1-spinal cord, 2-effector, 3-sensory neuron, 4-afferent neuron, 5-interneuron, 6-receptor

2. 1-effector, 2-spinal cord, 3-sensory neuron, 4-afferent neuron, 5-interneuron, 6-receptor

3. 1- Spinal cord, 2-receptor, 3-sensory neuron, 4-interneuron, 5-motor neuron, 6-effector

4. 1- Receptor, 2-spinal cord, 3-sensory neuron, 4-afferent neuron, 5-interneuron, 6-effector