3.5.3 Nervous System FMQuiz Homework Solution
Q. True or False. Motor neurons conduct impulses
towards the central nervous system.
A. FALSE
Q. What are interneurons or association neurons?
A. Nerves that link two neurons
Q. State one function of the hypothalamus of the
brain.
A. Homeostasis; Endocrine function
Q. What is a neuron?
A. Nerve cell
Q. Briefly explain the role of neurotransmitter
substances.
A. Carries impulse across synaptic cleft and triggers
impulse in next neuron
Q. State a function for the Myelin sheath.
A. Insulation; Protection; Speeds impulse
Q. What is white matter?
A. Many axons; Much myelin; Few cell bodies
Q. State one function of the cerebellum of the
brain.
A. Movement; Balance; Coordination
Q. Give a function of dendrites.
A. Receives and carries impulses to the cell body
Q. What term is used for glands that secrete
hormones?
A. Endocrine
Q. What is a sensory neuron?
A. Nerve that carries impulse from receptor
towards CNS
Q. State one function of the medulla oblongata of
the brain.
A. Involuntary muscle control
Q. State a function for Schwann cells.
A. Produces myelin sheath
Q. Name the small gaps between neurons.
A. Synaptic cleft; Synapse
Q. What is the central nervous system?
A. Brain and spinal cord
Q. Neurons produce neurotransmitter substances.
What is their function?
A. To carry impulse across synapse
Q. TRUE or FALSE. A motor neuron carries impulses
to the brain.
A. FALSE
Q. What is peripheral nervous system?
A. Nerves leading to and from CNS; Nerves not in
CNS
Q. Give an example of a reflex action in humans.
A. Knee-jerk
Q. Why are reflex actions important in humans?
A. Fast response; Defence against injury
Q. What is a motor neuron?
A. Nerve that carries impulse away from CNS to
effector
Q. Give one way in which a nervous response
differs from a hormonal response.
A. Faster; Shorter-lived; Electrical in nature
Q. State one function of the cerebrum of the brain.
A. Language; Reason; Consciousness; Senses;
Memory; Intelligence; Emotions
Q. What is grey matter?
A. Cell bodies of neurons; Few axons; Little myelin
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