Relay Pathways Flashcards
(15 cards)
What is a monosynaptic reflex?
A reflex that involves only one synapse between the sensory neuron and the motor neuron.
True or False: Polysynaptic reflexes involve multiple synapses.
True
Fill in the blank: The simplest form of a reflex arc is a __________ reflex.
monosynaptic
What is the main difference between monosynaptic and polysynaptic reflexes?
Monosynaptic reflexes involve one synapse, while polysynaptic reflexes involve multiple synapses.
Which type of reflex is faster: monosynaptic or polysynaptic?
Monosynaptic reflexes are faster.
Give an example of a monosynaptic reflex.
The patellar reflex (knee-jerk response).
In a polysynaptic reflex, what additional component is often involved?
Interneurons.
True or False: All reflexes are polysynaptic.
False
What role do interneurons play in polysynaptic reflexes?
They connect sensory neurons to motor neurons and can integrate multiple signals.
Multiple Choice: Which of the following is NOT a characteristic of monosynaptic reflexes?
A) Fast response
B) Involves one synapse
C) Involves interneurons
D) Simple reflex arc
C) Involves interneurons
What is the typical response time for a monosynaptic reflex?
Approximately 20-40 milliseconds.
Fill in the blank: In a polysynaptic reflex, the sensory neuron synapses with __________ before activating the motor neuron.
interneurons
True or False: Monosynaptic reflexes are more complex than polysynaptic reflexes.
False
What is one advantage of polysynaptic reflexes over monosynaptic reflexes?
They allow for more complex responses and integration of multiple sensory inputs.
Describe the pathway of a monosynaptic reflex arc.
Sensory neuron → spinal cord → motor neuron.
