which of the following represents activation of an “afferent” pathway?

Endocrine glands produce most of those chemical signals. Which of the following represents activation of an afferent pathway? the perception of being in a cold environment. An afferent signal is one that is conveyed to the control center so perceiving temperature is a sensory input. Continue reading.

A&P Mastering Ch 1 Flashcards | Quizlet

Study with Quizlet and memorize flashcards containing terms like Which of the following is an example of positive feedback? Which of the following represents activation of an afferent pathway? Which of the following is a typical effector in a feedback system? and more. Continue reading.

Overview of neuron structure and function – Khan Academy

www.khanacademy.org › science › biologyOverview of neuron structure and function – Khan Academy www.khanacademy.org › science › biology CachedOverviewHow do you know where you are right now?The human nervous systemClasses of neuronsSensory neuronsMotor neuronsInterneuronsThe basic functions of a neuronAnatomy of a neuronDendritesIntroduction to neurons and glia. How the structure of a neuron allows it to receive and transmit information. •The central nervous system (CNS) consists of the brain and the spinal cord. It is in the CNS that all of the analysis of information takes place. •The peripheral nervous system (PNS) which consists of the neurons and parts of neurons found outside of the CNS includes sensory neurons and motor neurons. Sensory neurons bring signals into the CNS and motor neurons carry signals out of the CNS. Diagram of the human nervous system. Central nervous system portions of the nervous system in the brain and spinal cord. Peripheral nervous system portions of the nervous system outside the brain and spinal cord. See full list on khanacademy.org Your ability to perceive your surroundings – to see hear and smell what’s around you – depends on your nervous system. So does your ability to recognize where you are and to remember if you’ve been there before. In fact your very capacity to wonder how you know where you are depends on your nervous system! If your perceptions indicate danger (“Oh no the house is on fire!”) your ability to act on that information also depends on your nervous system. In addition to letting you consciously process the threat your nervous system triggers involuntary responses like an increase in heart rate and blood flow to your muscles intended to help you cope with danger. All of these processes depend on the interconnected cells that make up your nervous system. Like the heart lungs and stomach the nervous system is made up of specialized cells. These include nerve cells (or neurons) and glial cells (or glia). Neurons are the basic functional units of the nervous system and they generate electrical signals called action potentials which allow them to quickly transmit information over long distances. Glia are also essential to nervous system function but they work mostly by supporting the neurons. In this article well take a closer look at neurons glia and nervous systems. Well see how the structure of neurons supports their function and how they can be organized into circuits that process information and generate a response. See full list on khanacademy.org In humans and other vertebrates the nervous system can be broadly divided into two sections the central nervous system and the peripheral nervous system. •The central nervous system (CNS) consists of the brain and the spinal cord. It is in the CNS that all of the analysis of information takes place. •The peripheral nervous system (PNS) which consists of the neurons and parts of neurons found outside of the CNS includes sensory neurons and motor neurons. Sensory neurons bring signals into the CNS and motor neurons carry signals out of the CNS. The cell bodies of some PNS neurons such as the motor neurons that control skeletal muscle (the type of muscle found in your arm or leg) are located in the CNS. These motor neurons have long extensions (axons) that run from the CNS all the way to the muscles they connect with (innervate). The cell bodies of other PNS neurons such as the sensory neurons that provide information about touch position pain and temperature are located outside of the CNS where they are found in clusters known as ganglia. See full list on khanacademy.org Based on their roles the neurons found in the human nervous system can be divided into three classes sensory neurons motor neurons and interneurons. See full list on khanacademy.org Sensory neurons get information about whats going on inside and outside of the body and bring that information into the CNS so it can be processed. For instance if you picked up a hot coal sensory neurons with endings in your fingertips would convey the information to your CNS that it was really hot. See full list on khanacademy.org Motor neurons get information from other neurons and convey commands to your muscles organs and glands. For instance if you picked up a hot coal it motor neurons innervating the muscles in your fingers would cause your hand to let go. See full list on khanacademy.org Interneurons which are found only in the CNS connect one neuron to another. They receive information from other neurons (either sensory neurons or interneurons) and transmit information to other neurons (either motor neurons or interneurons). For instance if you picked up a hot coal the signal from the sensory neurons in your fingertips would travel to interneurons in your spinal cord. Some of these interneurons would signal to the motor neurons controlling your finger muscles (causing you to let go) while others would transmit the signal up the spinal cord to neurons in the brain where it would be perceived as pain. See full list on khanacademy.org If you think about the roles of the three classes of neurons you can make the generalization that all neurons have three basic functions. These are to 1.Receive signals (or information). 2.Integrate incoming signals (to determine whether or not the information should be passed along). 3.Communicate signals to target cells (other neurons or muscles or glands). See full list on khanacademy.org Neurons like other cells have a cell body (called the soma). The nucleus of the neuron is found in the soma. Neurons need to produce a lot of proteins and most neuronal proteins are synthesized in the soma as well. Various processes (appendages or protrusions) extend from the cell body. These include many short branching processes known as dendrites and a separate process that is typically longer than the dendrites known as the axon. See full list on khanacademy.org The first two neuronal functions receiving and processing incoming information generally take place in the dendrites and cell body. Incoming signals can be either excitatory – which means they tend to make the neuron fire (generate an electrical impulse) – or inhibitory – which means that they tend to keep the neuron from firing. Most neurons receive many input signals throughout their dendritic trees. A single neuron may have more than one set of dendrites and may receive many thousands of input signals. Whether or not a neuron is excited into firing an impulse depends on the sum of all of the excitatory and inhibitory signals it receives. If the neuron does end up firing the nerve impulse or action potential is conducted down the axon. See full list on khanacademy.org Continue reading.

AP TEST 1 Flashcards | Quizlet

Which of the following represents activation of an afferent pathway? the cars speedometer The speedometer of a car provides information about the cars speed much like sensory organs provide the body with information. Continue reading.