Part I: Explain the communication process of neurons in the brain In your body you have nerve cells that are called neurons, but your brain has about one billion neurons. The neuron releases biochemical to receive and process information to other parts of your brain or body through the tiny fibers that extend out from the cell body called dendrites. The Neuron cell generates and conducts energy or electrical impulses that can be carried from one part of the brain to another part of the brain. These neurons have branch like matters that connect forming a network of wires that go throughout your body called axons. That is how your body parts interacts and communicate with each other.
Stimuli may be something like an extremely hot surface upon your skin. Interneurons transfer the signal toward the efferent neurons. These are the motor nerve fibers responsible for contracting the muscles in your arms to remove your hand from the hot surface. For the third question, there are actually several appropriate answers. However, we can focus in on Parkinson's disease (PD), which is essentially an issue with the neurotransmitter dopamine.
Its primary functions are producing, maintaining and repairing neurons along the long extension of the axons (Rodriquez, 2003). Moreover, it separates axons in the white matter of the brain by stopping nerves signals from short-circuiting. Furthermore, around most axons, the myelin furnishes a coating of electrical insulation that aids in preventing the shortage or loss of electrical signal from an action
The process in which when chemical massages are constantly being exchanged between neurons is called neurotransmission. Neurotransmission can also be defined as the process in which neurotransmitters travel between neurons. A resting neuron has a negative charge. Therefore there are more negative ions inside the axon than outside the axon. However, the fluid outside the axon has a positive charge.
Phineas Gage and role of the brain in cognitive function PSYC360 July 23 2012 This paper will discuss the role that cognitive function plays on the brain, as well as explaining how Phineas Gage’s accident support how the brain deals with cognitive function. Cognitive function includes all of perception such as sensing, reasoning, conception, imagining, and remembering. The brain is not one block; it breaks into several different functions of parts. There are three types of parts such as cerebrum, cerebellum, and brainstem. Among them, cerebrum is characteristic of the human being in the three parts of the brain.
The brain receives information by way of cells called neurons. These neurons have thousands of signals that are relayed to each other in the form of electric current. Chemical messengers, called neurotransmitters, medicate communication between neurons. Here is where nicotine comes to play. Nicotine works by attaching itself to receptors that bind the neurotransmitter called acetylcholine.
Nervous tissues - Conducts impulses organs from neurons. Simple squamous epithelium cells are made up of a single layer of epithelial cells. They are the point of contact for the epithelial tissue with the base membrane. They can be located in areas that face rapid diffusion and where little activity happens. Stratified epithelial cells consist of two or more layers of epithelial cells.
In the peripheral nervous system, nerve fibers of various diameters and functions (motor and sensory) are bundled together by connective tissue to form nerves. A compound action potential is the sum of all the action potentials occurring in the individual neurons of the whole nerve. The velocity of the compound action potential signal can be a measure and can indicate the state of health of the nerve. Diseases that damage the myelin, destroy neurons, or constrict the whole nerve will decrease the nerve's conduction velocity. The nerve conduction velocity is determined by recording the motor response of a muscle to the stimulation of its motor nerve at two or more points along the nerve course.
Therefore, platelets undergo degranulation the exocytosis of their cytoplasmic granules and release of factors that promote hemostasis. Aggregation is occurs when serotonin (vasoconstrictor), ADP (attracts more platelets and stimulates their degranulation), and thromboxane A2 (stimulates degranulation and vasoconstriction) are released. Thus it can quickly seal a small break in blood vessel. Coagulation is the last process of the hemostasis. It has three ways; intrinsic, extrinsic and common pathways.
Living creatures produce thousands of enzymes, and the reason for this is because; ‘most enzymes only catalyze one biochemical reaction’ (1), and many different enzymes are need to do this. Enzyme-substrate specificity, this is when ‘a typical enzyme only works on the substrates used in one reaction’ (1). This involves the substrate(s) that bind to the active site. Both active site’s and the substrate’s shape are a match. The reason for this is because; this allows the substrate to bind to the active site, which is known as the ‘lock and key model’.