how does the nervous system produce effects with such variation in time course?

How does the nervous system work?

The nervous system allows organisms to sense, organize, and react to information in the environment. The basic unit of the nervous system is the neuron. Synapses form between the neurons, allowing them to communicate to other neurons or other systems in the body. The general flow of information is that the peripheral nervous system (PNS) takes ...

What is the function of the central nervous system Quizlet?

How does the nervous system produce effects with such variation in time course? Selected Answer: Some neurotransmitters produce longer effects than others. Question 14 2 out of 2 points After you stare at a pattern of narrow lines long enough to fatigue certain feature detectors, you now stare at slightly wider lines.

How does the peripheral nervous system coordinate action and responses?

The nervous system plays a role in nearly every aspect of our health and well-being. It guides everyday activities such as waking up; automatic activities such as breathing; and complex processes such as thinking, reading, remembering, and …

What is the difference between stimulus response time and reaction time?

In addition to its potential impact on cardiac health, public health experts are concerned about the effect of high levels of caffeine exposure on the central nervous system and behavior. In the Day 1, Session 4, panel, moderated by Thomas J. Gould, Ph.D., Department of Psychology, Temple University, Philadelphia, Pennsylvania, panelists explored scientific evidence on the effects of …

How does the nervous system develop over time?

As you age, your brain and nervous system go through natural changes. Your brain and spinal cord lose nerve cells and weight (atrophy). Nerve cells may begin to pass messages more slowly than in the past. Waste products or other chemicals such as beta amyloid can collect in the brain tissue as nerve cells break down.Jul 25, 2020

How does the nervous system produce a response?

Based on the sensory input and integration, the nervous system responds by sending signals to muscles, causing them to contract, or to glands, causing them to produce secretions. Muscles and glands are called effectors because they cause an effect in response to directions from the nervous system.

How does the nervous system affect the nervous system?

The nervous system controls movement and balance, the five senses (sight, hearing, taste, smell, and touch), your thought processes, and how awake and aware you are. It includes the brain, the spinal cord, and all the nerves in the body.

How does the nervous system affect daily functioning?

It guides everyday activities such as waking up; automatic activities such as breathing; and complex processes such as thinking, reading, remembering, and feeling emotions. The nervous system controls: Brain growth and development. Sensations (such as touch or hearing)Oct 1, 2018

Which part of the nervous system is responsible for interpreting information and generating appropriate responses?

The brainThe brain is responsible for generating our thoughts as well as interpreting information from the PNS and responding appropriately. This process is made possible by tracts of nerve cells in the spinal cord which connect the brain to the PNS.

What is the main purpose of the nervous system?

The nervous system helps all the parts of the body to communicate with each other. It also reacts to changes both outside and inside the body. The nervous system uses both electrical and chemical means to send and receive messages.

Why is the nervous system the most important body system?

The human nervous system is responsible for coordinating every movement and action your body makes. More importantly, it controls every function inside the human body as well. For your heart to beat, your lungs to breath, and your feet to walk, your nervous system must be functioning properly.Jul 12, 2019

Why is the nervous system important essay?

Without the nervous system, humans would not be able to function. Nervous tissue is composed of cells called neurons, which allow the body to convey messages through electrical nerve impulses. Neurons help us make sense of stimulation, control muscle contractions, and coordinate many bodily functions and movements.Oct 26, 2018

What are three major functions of the nervous system?

The nervous system has three overlapping functions based on sensory input, integration, and motor output. At a more integrative level, the primary function of the nervous system is to control and communicate information throughout the body.Jan 3, 2021

How does the nervous system affect human behavior?

Your nervous system guides almost everything you do, think, say or feel. It controls complicated processes like movement, thought and memory. It also plays an essential role in the things your body does without thinking, such as breathing, blushing and blinking.May 12, 2020

Why is nervous system connected to fitness and why is it important to study?

The nervous system is not just responsible for stimulating muscle; it stimulates every tissue and organ within the body. It is therefore important that you understand the nervous system so that you can train clients safely and effectively. The nervous system and fitness go hand in hand.

How does the nervous system keep you alive?

It controls much of what you think and feel and what your body does. It allows you to do things like walk, speak, swallow, breathe and learn. It also controls how the body reacts in an emergency.

What are the two parts of the nervous system?

The nervous system can be broken down into two major parts—the central nervous system and the peripheral nervous system . The central nervous system , the main data center of the body, includes the brain and spinal cord. The peripheral nervous system includes all of the neurons that sense and communicate data to the central nervous system.

How are neurons connected to the nervous system?

Neurons are connected by synapses. innervate: To supply nerves to a tissue. The nervous system allows organisms to sense, organize, and react to information in the environment. The basic unit of the nervous system is the neuron.

What is the main communication system of the body?

The nervous system is the body’s main communication system; it gathers, synthesizes, and uses data from the environment. The most basic unit of the nervous system is the neuron, which serves as both a sensor and communicator of internal and external stimuli. The nervous system can be broken down into two major parts—the central nervous system ...

Which system controls voluntary movements?

The somatic nervous system controls voluntary movements such as those in the skin, bones, joints, and skeletal muscles. Both of these systems within the PNS work together with the CNS to regulate bodily function and provide reactions to external stimuli.

Which part of the brain controls the body's functions?

The brain is the main data center of the body, consisting of the cerebrum (which regulates higher-level functioning such as thought) and the cerebellum (which maintains coordination). The brain stem includes the midbrain, pons, and medulla, and controls lower-level functioning such as respiration and digestion.

What is the function of synapses?

Synapses form between the neurons, allowing them to communicate to other neurons or other systems in the body. The general flow of information is that the peripheral nervous system (PNS) takes in information through sensory neurons, then sends it to the central nervous system (CNS) to be processed.

Which part of the brain is responsible for the brain's motor and sensory functions?

cerebrum: In humans it is the largest part of the brain and is the seat of motor and sensory functions, as well as the higher mental functions such as consciousness, thought, reason, emotion, and memory. spinal cord: A thick, whitish cord of nerve tissue that is a major part of the central nervous system.

What is the role of the nervous system in our daily life?

The nervous system plays a role in nearly every aspect of our health and well-being. It guides everyday activities such as waking up; automatic activities such as breathing; and complex processes such as thinking, reading, remembering, and feeling emotions. The nervous system controls: Perception (the mental process of interpreting sensory ...

Why is it important to study the nervous system?

Studying and understanding the nervous system is important because it affects so many areas of human health and well-being. 1.

Why is perception important?

Studying and understanding the nervous system is important because it affects so many areas of human health and well-being. 1.

What are the phases of a muscle twitch?

Describe the three phases of a muscle twitch. Define wave summation, tetanus, and treppe. To move an object, referred to as a load, the muscle fibers of a skeletal muscle must shorten. The force generated by a contracting muscle is called muscle tension . Muscle tension can also be generated when the muscle is contracting against a load ...

What is the term for the increase in muscle tension?

When a skeletal muscle has been dormant for an extended period and then stimulated to contract, with all other things being equal, the initial contractions generate about one-half the force of later contractions. The muscle tension increases in a graded manner that to some looks like a set of stairs. This tension increase is called treppe, a condition where muscle contractions become more efficient. It’s also known as the “staircase effect” ( Figure 10.4.5 ).

Why is the skeletal muscle contracted?

Even if a muscle is not producing movement, it is contracted a small amount to maintain its contractile proteins and produce muscle tone. The tension produced by muscle tone allows muscles to continually stabilize joints and maintain posture.

What is the difference between eccentric and isometric contraction?

An eccentric contraction occurs as muscle tension diminishes and a muscle lengthens. This type of contraction is observed when the same hand weight is lowered in a slow and controlled manner by the biceps brachii. An isometric contraction occurs when a muscle produces tension without a change in muscle length.

What is isometric contraction?

An isometric contraction occurs when a muscle produces tension without a change in muscle length. Isometric contractions involve sarcomere shortening and increasing muscle tension, but do not move a load, as the force produced cannot overcome the resistance provided by the load.

What happens when a skeletal muscle fiber contracts?

As discussed previously, when a skeletal muscle fiber contracts, myosin heads attach to actin to form cross-bridges followed by the thin filaments sliding over the thick filaments as the heads pull the actin, and this results in sarcomere shortening, creating the tension of the muscle contraction. The cross-bridges can only form where thin and thick filaments overlap; thus, the length of the sarcomere has a direct influence on the force generated when the sarcomere shortens. This is called the length-tension relationship.

How long does a twitch last?

This isolated contraction is called a twitch. A twitch can last anywhere from a few milliseconds to 100 milliseconds, depending on the muscle fiber type.

What is stimulus in psychology?

stimulus is a change in the internal or external environment, causing a response. Information in the form of nerve impulses has to travel from the sense organ along nerves to the central nervous system (i.e. the brain or spinal cord) where it is processed.

How to determine the response?

decide upon a response. 1 Sensation: the time it takes to detect a sensory input from an object. 2 Perception/recognition: the time needed to recognize the meaning of the sensation. 3 Situational awareness: the time needed to recognise and understand the scene. 4 Response selection and programming: the time necessary to decide which and what response to make and to mentally program the movement.

How long does it take for sound to reach the ear?

It takes about 14-16 hundredths of a second to respond to an acoustic stimulus (excluding the time it takes for the sound to reach the ear), and 16-18 hundredths of a second to respond to optical stimuli.