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 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. Give a function of dendrites.
A. Receives and carries impulses to the cell body
Q. What is a sensory neuron?
A. Nerve that carries impulse from receptor towards CNS
Q. State a function for Schwann cells.
A. Produces myelin sheath
Q. What is the central nervous system?
A. Brain and spinal cord
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. 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
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 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. What term is used for glands that secrete hormones?
A. Endocrine
Q. State one function of the medulla oblongata of the brain.
A. Involuntary muscle control
Q. Name the small gaps between neurons.
A. Synaptic cleft; Synapse
Q. Neurons produce neurotransmitter substances. What is their function?
A. To carry impulse across synapse
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
Page 1 of 1