The tutor for the first-year psychology group is dealing with the topic of impulse conduction in the
human nervous system. After the group discussion, the tutor asks the students the following
questions to test their knowledge of the study material.
The part of the neuron that is responsible for...
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1 PYC1501 – Basic Psychology
PYC1501 (RPY1501) EXAM PREPARATION – Assignments and Exams
This document is an easy to read compilation of past UNISA Assignment and Exam Questions and
Answers
Answers are motivated by a combination of:
• Page references to the prescribed textbook
• Short summaries and/or content regarding the relevant topic(s) in question. (Incorrect
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alternatives)
Assignments covered are:
• Assignment 01 for Semester 1 2015
• Assignment 02 for Semester 1 2015
• Assignment 01 for Semester 2 2015
• Assignment 02 for Semester 2 2015
• Assignment 01 for Semester 1 2016
• Assignment 02 for Semester 1 2016
• Assignment 01 for Semester 2 2016
• Assignment 02 for Semester 2 2016
• Assignment 01 for Semester 1 2018
• Assignment 02 for Semester 1 2018
• Assignment 01 for Semester 2 2018
• Assignment 02 for Semester 2 2018
• Assignment 92 (Self-test)
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The tutor for the first-year psychology group is dealing with the topic of impulse conduction in the
human nervous system. After the group discussion, the tutor asks the students the following
questions to test their knowledge of the study material.
The part of the neuron that is responsible for receiving information signals from other neurons is
called ___.
1. Myelin sheath
2. boutons
3. dendrites
4. soma
Answer: The correct answer is 3
Refer: A-Z of Psy, pg. 88
Reasoning: The soma receives messages from other neurons through its dendrites.
Question 2
The part of the neuron that facilitates synaptic transmission of a signal to another neuron is called
___.
1. dendrites
2. boutons
3. axon
4. myelin sheath
Answer: The correct answer is 2
Refer: A-Z of Psy, pg. 90
Reasoning: The bouton vesicles of the telondendron release the neurotransmitters into the
synaptic cleft.
Question 3
The electrical charge resulting from the difference between the positive and negative ions outside
and inside the cell membrane is called ___.
1. the action potential
2. a threshold
3. the resting membrane potential
4. the refractory period
Answer: The correct answer is 3
Refer: A-Z of Psy, pg. 67
Reasoning: The resting membrane potential is an electrical charge brought about by the
difference between the positive and negative ions inside and outside the neuron.
This is also called a condition of readiness.
Question 4
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3 PYC1501 – Basic Psychology
Which of the following statement(s) about the neuron, based on the diagram is (are) correct?
1. In accordance with all-or-nothing-law, neurons A, B, C and D will conduct an impulse at
exactly the same speed, or not at all
2. In comparison with neurons A, C and D, neuron B can conduct impulses at the highest speed
and amplitude
3. In comparison with neurons A, B and C, neuron D will conduct impulses at the highest
frequency
4. 1 and 3
Answer: The correct answer is 2
Refer: A-Z of Psy, pg. 70
Reasoning: Although the strength and speed of an impulse is constant in a particular neuron, it
can vary with nerve fibres of different thickness. The larger the nerve fibre (the
greater the diameter or width), the stronger the impulse and the faster it is
conducted.
Question 5
In the myelinated neuron, the myelin sheaths are separated by a small gap called (an) ___ that
facilitates the neural impulse to jump from one point to another.
Answer: The correct answer is 4
Refer: A-Z of Psy, pg. 89
Reasoning: The gaps (approximately 1 micrometer wide) formed between myelin sheath cells
along the axons are called Nodes of Ranvier. Since fat serves as a good insulator, the
myelin sheaths speed the rate of transmission of an electrical impulse along the
axon.
Question 6
Low serotonin levels are associated with ___ just as dopamine deficiency is associated with
Parkinson’s disease.
1. seasonal depression
2. muscle spasm
3. suppression of pain
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