The Nervous System in Biology

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Which part of the nervous system consists of the brain and spinal cord?

Central nervous system (CNS) (correct)

Autonomic nervous system

Peripheral nervous system (PNS)

Enteric nervous system

What are the nerves that transmit signals from the body to the central nervous system called?

Motor nerves or efferent nerves

Sensory nerves or afferent nerves (correct)

Mixed nerves

Sympathetic nerves

When did nervous tissue first arise in wormlike organisms?

About 1 billion years ago

About 550 to 600 million years ago (correct)

About 100 million years ago

About 200 million years ago

Which subsystem of the peripheral nervous system mediates voluntary movement?

Somatic nervous system Signup and view all the answers

Which type of nerves serve both functions of transmitting signals from the body to the CNS and from the CNS to the body?

Spinal nerves Signup and view all the answers

What is the further subdivision of the autonomic nervous system that is responsible for rest and digest functions?

Parasympathetic nervous system Signup and view all the answers

What is the main function of the sympathetic nervous system?

To mobilize energy in emergencies Signup and view all the answers

Which type of cells provide structural and metabolic support in the nervous system?

Glia Signup and view all the answers

What is the role of the enteric nervous system?

To control the gastrointestinal system Signup and view all the answers

Which type of organisms have no nervous system at all?

Sponges, placozoans, and mesozoans Signup and view all the answers

What is the primary function of the parasympathetic nervous system?

To activate relaxation in organisms Signup and view all the answers

What is the purpose of cranial nerves?

To exit from the cranium Signup and view all the answers

What is the function of axons in neurons?

To send electrochemical impulses to other cells Signup and view all the answers

What do glial cells provide in the nervous system?

Structural and metabolic support Signup and view all the answers

Which animals have a nervous system consisting of a diffuse nerve net?

Anemones, hydras, corals, and jellyfish Signup and view all the answers

What is the role of the central nervous system?

To send signals from one part of the body to others Signup and view all the answers

The Nervous System in Biology

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