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Nervous System Overview Quiz

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Questions and Answers

What is the primary role of receptors in the nervous system?

To detect stimuli and send electrical impulses to the CNS (correct)

To inhibit neuronal communication

To coordinate responses without CNS involvement

To send impulses to muscles directly

Which components make up the central nervous system?

Spinal cord and peripheral nerves

Brain and spinal cord (correct)

Muscles and sensory neurons

Brain, heart, and spinal cord

In the response pathway, what occurs after the sensory neuron sends impulses to the CNS?

The stimulus is ignored

Muscles overreact to the stimulus

Electrical impulses are sent back to the receptors

The CNS coordinates an appropriate response (correct)

What triggers the response in the reflex arc pathway?

Muscle contraction resulting from an effector Signup and view all the answers

Which of the following correctly describes the sequence of events from stimulus to response?

Stimulus → Receptor → Coordination → Response → Effector Signup and view all the answers

What is the first step of a reflex arc process?

Stimulus detected by receptor Signup and view all the answers

Which part of the reflex arc is responsible for transmitting the electrical impulse from the CNS to the muscle?

Motor neurone Signup and view all the answers

What happens at the synapse in a reflex arc?

Chemical signals trigger impulses in adjacent neurones Signup and view all the answers

How does the electrical impulse travel in the sensory neurone of a reflex arc?

It travels as a continuous signal without interruption Signup and view all the answers

What is the role of the effector in a reflex arc?

To trigger a response, such as muscle contraction Signup and view all the answers

Study Notes

Nervous System Process Overview

Stimulus triggers a response via receptors, the central nervous system (CNS), and effectors.

Central Nervous System (CNS)

The CNS consists of the brain and spinal cord, and associated nerves.

Receptors and their Function

Receptors detect stimuli and transmit electrical impulses to the CNS via neurons.

Example of a Response Pathway

A heat stimulus on the finger (receptor) results in a muscle contraction (effector response). The pathway involves a sensory neuron, CNS processing, and a muscle effector.

Reflex Arc Components and Function

Sensory neurons receive stimuli, relay neurons transmit impulses across synapses, and effectors (muscles) cause the response. Chemical diffusion plays a key role at synapses.

Reflex Arc Step-by-step

Stimulus detection by receptors initiates the process.
Sensory neurons transmit electrical impulses to the CNS.
Synaptic transmission involves chemical diffusion to relay neurons.
Relay neurons relay the impulse to another synapse.
Chemical release triggers impulses in motor neurons.
Motor neurons transmit impulses to effectors.
Effectors (e.g., muscles) contract, producing the response (e.g., pulling away from heat).

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Description

Test your understanding of the nervous system processes, including the roles of receptors, the central nervous system (CNS), and effectors. This quiz also covers the reflex arc and how stimuli are detected and processed. Perfect for students studying biology or human anatomy.