Concept explainers
Introduction: Neuron is a basic functional unit of nervous system. The human brain consists of about 100 billion neurons. Neurons are the specialized cells of nervous system that makes a complex network for the transmission of messages.
Answer to Problem 1RQ
Correct answer: “All neural signals begin with a stimulus that activates a receptor”.
Explanation of Solution
Neural signal is a rapid and efficient network of nervous system. It carries various messages to and from the brain and spinal cord to all over the body and transfer signals across different parts of the body.
A stimulus is the prompt or a change in the environment of the neuron which illicit the movement of electrical impulse through the neurons in the body. This in turn creates a cascade of reactions that lead to the brain or the spinal cord through which a response is generated.
Thus, stimulus activates a receptor which results in the beginning of neural signals.
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Chapter 13 Solutions
Human Physiology: An Integrated Approach (8th Edition)
- CNS is composed of _____________ and ______________.arrow_forwardThe _______________ nervous system conducts impulses from the brain and spinal cord to the skeletal muscles.arrow_forwardNeurons in the ____________ in the _____________ respond best to the form and shape of complex images as opposed to single lines or dots.arrow_forward
- The ___________ ganglion contains the somas of neurons that carry sensory signals to the spinal cord.arrow_forwardThe ____________ is a period of time in which a neuron is producing an action potential and cannot respond to another stimulus of any strength.arrow_forwardA myelinated nerve fiber can produce action potentials only in specialized regions called _____________ .arrow_forward
- Neurons that convey information to the CNS are called sensory, or ___________ , neurons.arrow_forwardThe sciatic nerve is the largest nerve in the body. True or falsearrow_forwardNerves from the left side of the brainare mostly linked to the ______________side of the body, and vice versa.arrow_forward
- In the CNS, myelin is produced by glial cells called ___________ .arrow_forwardA presynaptic nerve fiber cannot cause ther neurons in its _________ to fire, but it can make them more sensitive to stimulation from other presynaptic fibers.arrow_forwardA/An _____ synapse is formed when a presynaptic neuron synapses with the cell body of a postsynaptic neuronarrow_forward
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