Nervous System Components

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Questions and Answers

What are the three main components that make up the nervous system?

The brain, the spinal cord, and nerves.

What two components make up the central nervous system?

The brain and the spinal cord.

Where do nerves bring messages to/from, in the form of nerve impulses?

Nerves bring messages as nerve impulses from sensory organs, which contain receptors to the CNS. Nerves also carry messages from the CNS to effectors.

What is the role of the CNS in processing nerve impulses?

The CNS sorts information and processes it. Signup and view all the answers

What carries messages from the CNS to trigger a response?

A different group of nerves. Signup and view all the answers

What are effectors and provide an example of one.

Effectors are usually muscles that carry out a response. An example would be bicep muscles contracting to lift a weight. Signup and view all the answers

What is described as the control center of the body?

The brain. Signup and view all the answers

Name three regions of the brain.

Cerebrum, cerebellum, and medulla. Signup and view all the answers

What functions does the cerebrum control?

Conscious actions, reasoning, and learning. Signup and view all the answers

What are the main functions of the cerebellum?

Balance and muscle co-ordination. Signup and view all the answers

What vital functions are controlled by the medulla?

Heart rate and breathing rate. Signup and view all the answers

How do sensory organs contribute to the function of the nervous system?

Sensory organs contain cells called receptors that receive messages as nerve impulses. Signup and view all the answers

Explain how the CNS is involved in triggering a response.

The CNS sorts information, processes it, and sends messages through nerves to effectors to trigger a response. Signup and view all the answers

Describe the relationship between the brain's function and its regions.

The brain is the control center of the body, and it has several different regions each with its own specialised function. Signup and view all the answers

If a person is having difficulty with balance and coordination, which part of the brain may be affected?

The cerebellum. Signup and view all the answers

What would happen if the medulla was damaged?

Potentially, issues with heart rate and breathing. Signup and view all the answers

How does the brain contribute to learning and reasoning?

The cerebrum controls conscious action, as well as reasoning and learning. Signup and view all the answers

Explain the role of nerves in relaying messages between the sensory organs and the muscles.

Nerves bring messages as nerve impulses from sensory organs to the CNS, and carry messages from the CNS to muscles to trigger a response. Signup and view all the answers

Discuss the importance of the brain and spinal cord working together as the central nervous system.

The brain is the control system of the body and spinal cord carries signals too and from the brain. Together they regulate the body. Signup and view all the answers

Why is it important for the CNS to sort and process information effectively?

The CNS needs to sort and process information quickly to trigger a response quickly. Signup and view all the answers

Flashcards

Nervous System Components

The nervous system is composed of the brain, the spinal cord, and the nerves.

Central Nervous System (CNS)

The brain and spinal cord make up the central nervous system.

Nerve Function in CNS

Nerves transmit messages as nerve impulses from sensory organs, which contain cells called receptors, to the CNS.