WorksheetsA2 Biology nervous system
Total questions: 15
Worksheet time: 1hrs 13mins
Name
Class
Date
1.
A nerve is
a)
a neurone
b)
a cell which always has a dendron
c)
a bundle of neurones
d)
all options are incorrect
2.
This diagram shows a
a)
sensory neurone
b)
motor neurone
c)
relay neurone
d)
association neurone
3.
The myelin sheath around an axon is made
a)
of ions
b)
of carbohydrates
c)
from Schwann cells
d)
of cytoplasm
4.
In a motor neurone there is
a)
a dendron but no axon
b)
a dendron and an axon
c)
an axon but no dendron
d)
none of these options is correct
5.
When the neurone is not conducting a nerve impulse the membrane is
a)
polarised
b)
depolarised
c)
repolarised
d)
action potential
6.
When an action potential is generated, the inside of the membrane becomes
a)
positive relative to the outside
b)
negative relative to the outside
c)
polarised
d)
filled with potassium ions
7.
Threshold stimulus means that
a)
the size of the action potential does not change
b)
only one impulse is conducted at a time
c)
a certain level of stimulus is required to generate an action potential
d)
the membrane becomes repolarised quickly after an action potential passes
8.
The time following an action potential in which no new action potential can be generated is called
a)
the refractory period
b)
the nerve impulse
c)
the stationary phase
d)
the threshold period
9.
The speed of nerve transmission is greatest when there is
a)
a myelin sheath
b)
saltatory conduction
c)
thick axon
d)
all options are correct
10.
A motor neurone is used to
a)
link the eye to the brain
b)
connect the spinal cord to the thigh muscle
c)
communicate within the brain
d)
detect a stimulus
11.
In this diagram of a motor neurone, the dendrites are labelled
a)
1
b)
2
c)
3
d)
4
12.
In this diagram of a motor neurone, label 4 shows the
a)
dendron
b)
myelin sheath
c)
cell body
d)
node of Ranvier
13.
The central nervous system consists of
a)
the brain
b)
the brain and spine
c)
the spinal cord and brain
d)
the major nerves and the brain
14.
The resting potential of a neurone membrane is
a)
-70mV
b)
70mV
c)
70V
d)
40mV
15.
The "all-or-nothing" law states that
a)
a certain stimulus intensity is needed to generate an action potential
b)
the action potential is of a fixed size regardless of the stimulus intensity
c)
the axon needs time to repolarise after an action potential is formed
d)
that the impulse only travels in one direction
100 %
