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Reflexes
If your hand touches a hot object the reflex response is to move it away very quickly!

Reflexes

This Biology quiz is called 'Reflexes' and it has been written by teachers to help you if you are studying the subject at middle school. Playing educational quizzes is a fabulous way to learn if you are in the 6th, 7th or 8th grade - aged 11 to 14.

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The nervous system allows an organism to react to its surroundings and coordinate its behavior, improving its chances of survival. This middle school Biology quiz takes a closer look at reflexes - the most primitive, yet fundamental, automatic response mechanism. Our reflexes allow us to take action without thinking, but how? Well, the mechanism works like this - in a reflex reaction, a stimulus is received by receptors and an automatic, rapid response is generated by the central nervous system without the involvement of the brain.

1.
The synapse between the sensory and relay neurones is within which part of the body?
The brain
The heart
The spinal cord
The muscles
The bundle of neurons in the spinal cord is referred to as the central nervous system
2.
The last cell in the reflex is which type of neuron?
Motor
Sensory
Intermediate
Relay
Also called an effector as it makes the body do something
3.
The first cell in the reflex is which type of neuron?
Motor
Relay
Sensory
Intermediate
These detect stimuli
4.
If the effector is a gland, what would the response be?
A release of blood
The release of a hormone
A muscle contraction
A muscle expansion
Glands are part of the endocrine system and are where hormones are produced
5.
Which of the following is an example of an effector?
The heart
The liver
The kidneys
The muscles
Effectors are the output organs for reflexes and they include both muscles and glands
6.
What is the name for the connection between two nerve cells?
Junction
Synapse
Gap
Transmitter
The nerve impulse is usually transmitted from neuron to neuron by a chemical
7.
What is the correct order of the reflex arc?
Motor - relay - sensory
Sensory - motor - relay
Sensory - relay - motor
Relay - sensory - motor
The brain is not involved, although the relay neuron does send a message to the brain so that the animal is aware of what is happening
8.
A reflex arc consists of a chain of which type of cells?
Brain
Neurons
Muscle
Liver
Nerve cells are called neurons (sometimes spelled with an 'e' as neurones)
9.
Which of the following is not true of reflexes?
Faster than hormonal responses
Brain not involved
Act for a short time
Brain involved
Although there is a connection to the brain, the nerve impulses that cause the reflex pass only through the central nervous system. Going through the brain would slow things down
10.
Your hand touches a hot object. What is the reflex response?
To grab hold of the object
To throw the object
To move the hand away swiftly
To think about what to do
Reflexes are very fast and do not involve thinking. This protects the organism from dangers such as a hot object
Author:  Donna Maria Davidson

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