The Brain Flashcards
Explain why a person may die if the medulla is damaged
-Controls vital processes, heartbeat, breathing
-which will stop when it’s damaged
What is reflex action
A rapid involuntary response to a stimulus
The spinal cord is damaged on a persons lower back, Explain why the person will no control over their skeletal muscles of their legs
-The impulses from the cerebrum, are not transmitted, to the skeletal muscles
Part that produces reaction in Reflex Arc
Effector
Why a Synapse is significant
It ensures that the impulse is transmitted in one direction
Describe the pathway of the impulse in this reflex arc to bring about the knee-jerk reaction.
-The impulse is transmitted from the receptors in the patellar tendon
-through the sensory neuron
-and the Synapse
-to the Motor Neuron
-and to the quadriceps muscle
Symptom of Alzheimers disease
Worsening ability to remember new information
Explain how the speed of transmission of impulses will differ if neuron 1 has myelin Sheath and neuron 2 does not
-impulses will be transmitted faster in neuron 1
-Because of the presence of a myelin sheath in neuron 1
Explain why a person will feel stimulus but will not be able to respond if a motor neuron is damaged
-Impulses from the sensory neuron
-will be transmitted to the CNS
-the impulse will not reach the effector
Contains sensory neuron
Dorsal Root
What produces a reaction
The Effector
What is responsible for converting a stimulus into an impulse
Receptor
Name the part of the neuron which transmits an impulse towards the cell body
Dendrite
Name Two structures which protect the spinal cord
-Meninges
-cerobrospinal cord
Which part of a neuron by multiple sclerosis
-Myelin sheath
Regulates heartbeat and breathing rate
Medulla Oblongata
Coordinates movement while walking
Cerebellum
Interprets what you see
Cerebrum
Significant of reflex action
Helps to protect the body by reacting quickly
Passes signals from one neuron to another
Interneuron
Effect of the disorder multiple sclerosis
The muscle not receive the signal to contract
Difference between sensory and motor neuron
-Sensory, transports the impulse from the receptor to central nervous system,
- Motor, Transport the impulse from the CNS to the effectors
Name the component that slows down the heart rate when an emergency situation had passed
Parasympathetic Nervous System
Name the nerve cells that make up the nervous tissue
Neurons
