1
BIOD 152 EXAMS/ ALL MODULES 1-5 COMPLETE STUDY
GUIDE QUESTIONS and answers 2025\2026
BIOD 152 module 1 Exam Questions with Answers.
What causes the differences in intensity of a sensation? - ANSWER -
Due to the number of neurons stimulated and the frequency with
which they are stimulated
An impulse from a neuron moves in both directions T or F - ANSWER -
False
What is meant by neuron signals being electrochemical in nature? -
ANSWER - The signal moves from electrical (through the neuron) to
chemical (in the synapse) to electrical again once the signal reaches the
next neuron
What is the chemical portion of neuron signal transmission? - ANSWER -
neurotransmitters
, 2
How is an impulse passed from one nerve cell to another? -
ANSWER - There is a minute fluid-filled space, called a
synapse, between the axon terminal of the sending neuron
and the dendrite of the receiving neuron. When a nerve impulse
reaches the end of an axon, neurotransmitters are released into the
synapse. These bind with a receptor on the next neuron, opening Na+
gates in the receiving dendrite which causes depolarization and the
impulse is carried
Describe the movement of nerve impulses in the PNS - ANSWER - the
PNS receives impulses from the sensory organs via the afferent division
and then relays signals or impulses from the CNS to muscles and glands
via the efferent division
What are the 2 divisions of the efferent division of the PNS? - ANSWER -
somatic system and autonomic system
What is the function of the sympathetic nervous system? - ANSWER -
activates and prepares the body for vigorous muscular activity, stress,
and emergencies
What is the function of the parasympathetic nervous system? -
ANSWER - operates during normal situations, permits digestion, and
conserves energy.
What is controlled by the somatic and autonomic nervous systems -
ANSWER - The somatic system controls the movements of skeletal
, 3
muscles, skin, and joints. The autonomic system nerves
control the glands and smooth muscles of the internal
organs
What is the difference between anatomy and physiology? –
ANSWER - Anatomy- study of the structure of body parts
Physiology- study of the functions of the body
The physiology of the body depends on the anatomy of the body
How does the nervous system work? –
ANSWER - receives and processes info and sends out signals to the
muscles and glands to elicit an response
List the 2 parts of the nervous system. –
ANSWER - CNS and PNS (central nervous system and peripheral nervous
system)
How are the parts of the central nervous system protected? –
ANSWER - The skull protects the brain and the vertebrae protect the
spinal cord
What are the collections of cell bodies in the CNS called? - ANSWER -
Nuclei
, 4
What are the collection of nerve axons in the CNS called? -
ANSWER - Tracts
What is included in the peripheral nervous system? - ANSWER - cranial
nerves and spinal nerves
What are the collections of cell bodies inside in the PNS called? -
ANSWER - Ganglia
What are the collections of nerve axons in the PNS called? - ANSWER -
Nerves
What are the 2 divisions of the PNS? - ANSWER - afferent and efferent
What are the 2 divisions of the autonomic nervous system? - ANSWER -
sympathetic and parasympathetic
label components of a neuron - ANSWER - see image
List 3 unusual characteristics of neurons - ANSWER - Neurons do not
undergo mitosis (cell division), require enormous amounts of fuel being
able to survive just minutes without oxygen and can last an entire
human lifetime
List the 3 parts that all neurons contain - ANSWER - dendrites, cell body,
axon
BIOD 152 EXAMS/ ALL MODULES 1-5 COMPLETE STUDY
GUIDE QUESTIONS and answers 2025\2026
BIOD 152 module 1 Exam Questions with Answers.
What causes the differences in intensity of a sensation? - ANSWER -
Due to the number of neurons stimulated and the frequency with
which they are stimulated
An impulse from a neuron moves in both directions T or F - ANSWER -
False
What is meant by neuron signals being electrochemical in nature? -
ANSWER - The signal moves from electrical (through the neuron) to
chemical (in the synapse) to electrical again once the signal reaches the
next neuron
What is the chemical portion of neuron signal transmission? - ANSWER -
neurotransmitters
, 2
How is an impulse passed from one nerve cell to another? -
ANSWER - There is a minute fluid-filled space, called a
synapse, between the axon terminal of the sending neuron
and the dendrite of the receiving neuron. When a nerve impulse
reaches the end of an axon, neurotransmitters are released into the
synapse. These bind with a receptor on the next neuron, opening Na+
gates in the receiving dendrite which causes depolarization and the
impulse is carried
Describe the movement of nerve impulses in the PNS - ANSWER - the
PNS receives impulses from the sensory organs via the afferent division
and then relays signals or impulses from the CNS to muscles and glands
via the efferent division
What are the 2 divisions of the efferent division of the PNS? - ANSWER -
somatic system and autonomic system
What is the function of the sympathetic nervous system? - ANSWER -
activates and prepares the body for vigorous muscular activity, stress,
and emergencies
What is the function of the parasympathetic nervous system? -
ANSWER - operates during normal situations, permits digestion, and
conserves energy.
What is controlled by the somatic and autonomic nervous systems -
ANSWER - The somatic system controls the movements of skeletal
, 3
muscles, skin, and joints. The autonomic system nerves
control the glands and smooth muscles of the internal
organs
What is the difference between anatomy and physiology? –
ANSWER - Anatomy- study of the structure of body parts
Physiology- study of the functions of the body
The physiology of the body depends on the anatomy of the body
How does the nervous system work? –
ANSWER - receives and processes info and sends out signals to the
muscles and glands to elicit an response
List the 2 parts of the nervous system. –
ANSWER - CNS and PNS (central nervous system and peripheral nervous
system)
How are the parts of the central nervous system protected? –
ANSWER - The skull protects the brain and the vertebrae protect the
spinal cord
What are the collections of cell bodies in the CNS called? - ANSWER -
Nuclei
, 4
What are the collection of nerve axons in the CNS called? -
ANSWER - Tracts
What is included in the peripheral nervous system? - ANSWER - cranial
nerves and spinal nerves
What are the collections of cell bodies inside in the PNS called? -
ANSWER - Ganglia
What are the collections of nerve axons in the PNS called? - ANSWER -
Nerves
What are the 2 divisions of the PNS? - ANSWER - afferent and efferent
What are the 2 divisions of the autonomic nervous system? - ANSWER -
sympathetic and parasympathetic
label components of a neuron - ANSWER - see image
List 3 unusual characteristics of neurons - ANSWER - Neurons do not
undergo mitosis (cell division), require enormous amounts of fuel being
able to survive just minutes without oxygen and can last an entire
human lifetime
List the 3 parts that all neurons contain - ANSWER - dendrites, cell body,
axon
