What is the peripheral nervous system?

It is all the nervous tissue outside the brain and spinal cord, made up of the sensory and motor neurones that connect the central nervous system to receptors and effectors.

Which effectors does the autonomic nervous system supply?

The autonomic nervous system supplies smooth muscle, cardiac muscle and glands.

How does the number of neurones between the central nervous system and the effector differ in somatic and autonomic pathways?

A somatic pathway uses a single motor neurone running all the way from the central nervous system to the muscle, whereas an autonomic pathway uses two neurones with a synapse in a ganglion between them.

What are the two divisions of the autonomic nervous system?

The autonomic nervous system is divided into the sympathetic and the parasympathetic divisions.

OCR A-Level Biology B H422

The Developing Cell: Cell Division and Cell Differentiation

Topic overview The cell cycle and mitosis Apoptosis in growth and repair Stem cells and cell differentiation

The Developing Individual: Meiosis, Growth and Development

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The Development of Species: Evolution and Classification

Topic overview Classification and the species concept Evidence for classification and DNA barcoding Phylogenetic trees, hominids and the evolution of language Human adaptations, natural selection and evolution Plant adaptations and how they are investigated Measuring biodiversity and genetic diversity

Cells and Microscopy

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Plant Reproduction

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The Nervous System and the Identification and Consequences of Damage

Topic overview Organisation of the nervous system and nervous tissue The structure and function of the human brain The structure of motor, sensory and relay neurones Resting potential and the action potential Synapses and the integration of responses Reflexes, reaction times and their investigation Brain scans and the consequences of nervous system damage Drugs, brain function and dependency

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The Effect of Ageing on the Nervous System

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The Heart and Monitoring Heart Function

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Transport Systems in Mammals

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Transport Systems in Plants

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The Nervous System and the Identification and Consequences of Damage

Organisation of the nervous system and nervous tissue

3 things to know
Components 01, 02 and 03

Overview

Recall questions on the central and peripheral nervous systems, somatic and autonomic pathways, the sympathetic and parasympathetic divisions and their neurotransmitters and effects, grey and white matter in the spinal cord, myelin, dorsal root ganglia, and calculating magnification.

What you need to know

Answer each one before you reveal it.

Your recallNot started

Key term

How is the mammalian nervous system divided, and what does each division supply?

Key term

Which two structures make up the central nervous system?

Key term

Which effectors does the somatic nervous system supply?

Questions from this subtopic

Each one with the model answer underneath.

1
Which two structures make up the central nervous system?
Model answer
The central nervous system consists of the brain and the spinal cord.
2
What is the peripheral nervous system?
Model answer
It is all the nervous tissue outside the brain and spinal cord, made up of the sensory and motor neurones that connect the central nervous system to receptors and effectors.
3
Which effectors does the somatic nervous system supply?
Model answer
The somatic nervous system supplies skeletal muscle, giving voluntary control of movement.
4
Which effectors does the autonomic nervous system supply?
Model answer
The autonomic nervous system supplies smooth muscle, cardiac muscle and glands.
5
How does the number of neurones between the central nervous system and the effector differ in somatic and autonomic pathways?
Model answer
A somatic pathway uses a single motor neurone running all the way from the central nervous system to the muscle, whereas an autonomic pathway uses two neurones with a synapse in a ganglion between them.
6
What are the two divisions of the autonomic nervous system?
Model answer
The autonomic nervous system is divided into the sympathetic and the parasympathetic divisions.

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The Developing Cell: Cell Division and Cell Differentiation

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Cells and Microscopy

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