Nerves & reflex arcs Flashcards
What is the word for a change in the environment that a receptor cell responds to?
A stimulus
What is the name of the system that enables humans to react to their environment?
The nervous system
What is the word for an organ or tissue that brings about the response in a reflex action?
Effector
Which organ system coordinates the actions of the body?
The system nervous
What is the name of the junction between two neurones?
Synapse
True or false? Neurones carry signals by moving neurotransmitters from their dendrons to their axons and out through a synapse with another cell.
False
What stimuli are receptors in the nose and tongue sensitive to?
Chemicals
Where in the nervous system is information from receptors taken to for processing?
Brain
The brain coordinates the __________ to a stimulus. What word completes this sentence?
Response
What organ in the body usually reacts to temperature first?
Skin
In a reflex action, where do sensory and relay neurones meet?
Synapse
Nerve cells can form many branches. How does this relate to their function?
they form networks with other nerve cells
Neurotransmitters are received in the dendron and then cause an __________ impulse to be sent along the axon. What word completes the sentence?
Electrical
