Understanding Neurons and Reflexes

What is the primary function of a neuron?

• To transmit information throughout the nervous system.

• To produce hormones for the body.

• To provide structural support to tissues.

• To store memories in the brain.

Which part of the neuron receives signals from other neurons?

• Axon

• Dendrites

• Myelin sheath

• Soma

What is the gap between two neurons called?

• dendrite

• neurotransmitter

• synapse

• axon

What role does the myelin sheath play in nerve impulse transmission?

• The myelin sheath slows down nerve impulse transmission by blocking signals.

• The myelin sheath is responsible for producing neurotransmitters in the synapse.

• The myelin sheath connects neurons directly to muscles for faster response.

• The myelin sheath speeds up nerve impulse transmission by insulating axons and facilitating saltatory conduction.

Which ion is essential for nerve impulse transmission?

• Sodium (Na+) and Potassium (K+) ions

• Magnesium (Mg2+) ions

• Chloride (Cl-) ions

• Calcium (Ca2+) ions

What is a reflex arc?

• A reflex arc is a neural pathway that mediates a reflex action.

• A reflex arc is a type of sensory organ.

• A reflex arc is a part of the digestive system.

• A reflex arc is a type of muscle contraction.

In a reflex arc, which type of neuron carries signals to the muscles?

• Cognitive neuron

• Interneuron

• Motor neuron

• Sensory neuron

What is the role of sensory neurons in a reflex arc?

• Sensory neurons are responsible for muscle contraction in reflexes.

• Sensory neurons inhibit signals in the reflex arc.

• Sensory neurons detect stimuli and transmit signals to the central nervous system in a reflex arc.

• Sensory neurons only function in voluntary movements.

What happens to the body during a reflex action?

• The response is always a conscious decision made by the individual.

• The brain processes the stimulus before any response occurs.

• The body responds quickly to a stimulus without involving the brain, resulting in an immediate motor response.

• The body takes time to analyze the situation before reacting.

What is the role of interneurons in the nervous system?

• Interneurons transmit signals from sensory neurons to motor neurons.

• Interneurons are responsible for the production of hormones.

• Interneurons connect sensory neurons directly to muscles.

• Interneurons only function in voluntary movements.