The Shift in Pulse Rates on Daphnia

Essay by GloriamaUniversity, Bachelor'sA, May 2007

download word file, 8 pages 4.0

IntroductionIn the Nervous System is made of neurons, nervous systems, the Peripheral Nervous System, the Central Nervous System, Somatic Nervous System, the Autonomic Nervous Systems, the brain, and the spinal cord. There are three basic functions that are performed continuously in the nervous system: 1.) Receive sensory input from internal and external environments, 2.) Integrate the input, and 3.) Respond to stimuli. The spinal cord, the cortical and subcortical areas of the brain help process different kinds of sensory information through neuronal structures that function as information areas in the brain. The central nervous system (CNS) represents the largest part of the nervous system. Together with the peripheral nervous system, it has a fundamental role in the control of behavior. The Peripheral Nervous System is the part of the vertebrate nervous system constituting the nerves outside the central nervous system and including the cranial nerves, spinal nerves, and sympathetic and parasympathetic nervous systems.

The CNS is an intricate arrangement of interlinked compositions that requires intercommunication among distant neurons known as nervous cells and peripheral nerves, in order to incorporate and adjust the movement of several modular cerebral structures. Below are two samples of where the CNS is located in the human body (Sherwood, 180-181).

Figure 1: The brain and spinal cord (CNS)Figure 2: The brain with its divisional sensory information.

Information is transmitted from one neuron to the next under the form of nerve impulses known as synapses. There are two major types of synapses: the electrical synapses and the chemical synapses. Through this intercession of chemical substances that inhabit explicit receptors in the nerve cells known as neurotransmitters also have some neurotransmitters that are hormones from which instigated from different glands, for example, the adrenal, pituitary, pineal, and the liver. There are other neurotransmitters for example like serotonin,