Answer:
A sensory neuron.
Explanation:
The nervous system can be divided in two systems: the central nervous system and the peripheral nervous system. The central nervous system (CNS) is composed by the brain and the spinal cord. The peripheral nervous system (PNS) consists of the nerves and ganglia. Neurons are specialized cells that form the basic functional unit of the nervous system. There are three types of neurons: sensory, motor and interneurons. The sensory neurons are in charge of bringing signals into the CNS, and the motor neurons are in charge of carrying signals out of the CNS. The interneurons act as intermediaries, passing information between two neurons.
As the name implies, sensory neurons are activated by the senses, for example: sound, visible light, physical contact (heat and cold), chemical signals (smell and taste). The loss of sensation in one hand would be the result of a damaged sensory neuron.
Mostly because they are made up of living cells, but in the bigger picture they are not alive.
The increase in muscle tension that is produced by increasing the number of active motor units is called. recruitment. The type of contraction in which the muscle fibers do not shorten is called. isometric.
Answer:
• ecosystem. A community interacting with its physical environment through the transfer of energy and materials
Explanation:
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