Reflex System Flashcards
What is a reflex?
A reflex is an automatic, rapid response to a stimulus.
What is the pathway of a reflex action called?
The pathway of a reflex action is called a reflex arc.
True or False: Reflex actions are controlled by the brain.
False: Reflex actions are controlled by the spinal cord.
Fill in the blank: The main components of a reflex arc include a _____, an _____, and an _____ neuron.
receptor, sensory, and motor
What role does the interneuron play in a reflex arc?
The interneuron connects sensory and motor neurons within the spinal cord.
Multiple Choice: Which of the following is NOT a component of the reflex arc? A) Receptor B) Interneuron C) Hormone D) Effector
C) Hormone
What is the function of the effector in a reflex arc?
The effector produces the response to the stimulus.
Name one example of a reflex action.
The knee-jerk reflex.
True or False: Reflex actions are slower than voluntary actions.
False: Reflex actions are faster than voluntary actions.
What type of neuron carries impulses away from the central nervous system?
Motor neurons.
Fill in the blank: In a reflex arc, the _____ detects the stimulus.
receptor
Multiple Choice: Which part of the nervous system is primarily involved in reflex actions? A) Peripheral B) Central C) Autonomic D) Somatic
B) Central
What happens during the synapse in a reflex arc?
Neurotransmitters are released to transmit signals between neurons.
True or False: Reflex arcs can operate independently of the brain.
True.
What is the role of sensory neurons in a reflex arc?
They carry impulses from the receptors to the spinal cord.
Fill in the blank: The _____ is the part of the reflex arc that performs the action.
effector
Multiple Choice: Which reflex is an example of a spinal reflex? A) Blinking B) Withdrawal C) Breathing D) Thinking
B) Withdrawal
What is the purpose of a reflex action?
To protect the body from harm by providing a quick response to stimuli.
Short answer: How does the body benefit from reflex actions?
They allow for quick reactions to potentially harmful stimuli, minimizing injury.
What is the difference between a reflex action and a voluntary action?
A reflex action is automatic and occurs without conscious thought, while a voluntary action requires conscious control.
Describe the reflex arc?
Stimulus, receptor, sensory neuron, relay neuron, CNS, relay neuron, motor neuron, effector, response
