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sense organ-nerves-spinal cord-brain

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Virginia Von

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4y ago

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What is the cell body enclosed by?

The cell body, or soma, is enclosed by a cell membrane known as the plasma membrane. This membrane surrounds the cell body and separates the internal cellular environment from the external environment.


What body system processes and analyzes information?

The nervous system processes and analyzes information received from the body's sensory receptors. This information is then used to initiate appropriate responses or actions to maintain homeostasis and respond to the environment.


Exchange of gases between body and environment is called?

The exchange of gases between the body and the environment is called respiration. This process involves the inhalation of oxygen and the exhalation of carbon dioxide.


What part of the body sends a message to the brain?

Your nervous system sends messages from the body to the brain. Different kinds of Neurons are used to send each message, to allow your brain to know what is going on in your environment. The things that cause a reaction are called Stimuli. Messages are sent along nerve cells, or Neurons. For instance, if you prick your finger on a pin, a sensor in your skin called a Receptor sends a message of pain through a Sensory Neuron, to a Relay neuron in your Central Nervous System (which is your brain and spinal cord). The message is then sent through the CNS, to the brain, so your brain can decide how to react to the pain. The message is THEN sent through a motor neuron, which causes your muscles to move to react to the message. (Something that reacts to a message from a neuron is called an Effector- because it causes an effect.) In this case, the message from the motor neuron to the effector- your muscle- would make you pull your hand back, to get it away from the pin. In short: A change in your environment, like pain, is picked up by a Receptor. The message picked up by the Receptor is sent through a Sensory Neuron. The message is then sent through the Central Nervous System by Relay Neuron. Once the brain has decided what to do, it sends a message to the Motor Neuron. The Motor Neuron triggers an Effector (a muscle, or some chemical secretion) to react to the change. It may not be completely correct, but I'm 90% sure that's at least a rough, simple version.


Nerve impulses are received and transmitted to the cell body by?

Nerve impulses are received and transmitted to the cell body by dendrites, which are branched structures that extend from the cell body. Dendrites receive signals from other neurons or sensory receptors and transmit this information to the cell body for integration and processing.