Nervous System

The nervous system is responsible for receiving and processing stimuli from the external environment or within the body. This information is then relayed to the brain for interpretation and to coordinate appropriate responses through motor neurons. This ability to react to stimuli is crucial for survival and maintaining homeostasis.

A motor endplate is a large special synaptic contact between motor axons and each skeletal muscle fiber. Each muscle fiber forms one endplate. Its function is to transmit impulses from nerves to muscles.

The network of spinal nerves that supplies the pelvis and legs is known as the lumbosacral plexus. It is formed by the lower lumbar and sacral spinal nerves and gives rise to various nerves that innervate the lower extremities, including the sciatic nerve, femoral nerve, and obturator nerve. These nerves play a crucial role in motor and sensory functions of the pelvis and legs.

The central nervous system is made up of the brain and spinal cord. The brain is responsible for processing information, while the spinal cord acts as a pathway for transmitting messages between the brain and the rest of the body.

Yes, neurons are the basic building blocks of the nervous system. They are specialized cells that process and transmit information through electrical and chemical signals. Neurons play a key role in functions such as sensation, movement, reflexes, and cognition.

Both hormones and secretions of the nervous system are chemical messengers that help regulate various bodily functions. Hormones are produced by glands and released into the bloodstream to target distant organs, while nervous system secretions like neurotransmitters act locally at synapses to transmit signals between neurons. Both systems work together to maintain homeostasis and coordinate responses to internal and external stimuli.

The human brain does not have nerves. Nerves are part of the peripheral nervous system, which includes nerves outside the brain and spinal cord. The brain itself is made up of neurons, glial cells, and other supporting structures.

neuron. Neurons are specialized cells that transmit information through electrical and chemical signals. They form the building blocks of the nervous system and are responsible for processing and transmitting information throughout the body.

Parkinson's disease is a disorder of the nervous system that affects movement, leading to symptoms such as tremors, muscle stiffness, and difficulty with balance and coordination. It is caused by the degeneration of dopamine-producing neurons in the brain.

The basic functioning unit of the central nervous system is the neuron. Neurons are specialized cells that transmit information through electrical and chemical signals. They form intricate networks that facilitate communication within the brain and spinal cord.

The autonomic nervous system responds to the addition of epinephrine by causing an increase in heart rate, blood pressure, and blood flow to muscles. This is part of the "fight or flight" response, where the body prepares for intense physical activity or stress.

the main part of the nervous system are the brain the spinal cord and the neurons.

The Two MAIN parts of the nervous systems are the central and peripheral nervous

system.

THE CEREBELLUM IS PART OF THE NERVOUS SYSTEM

The autonomic nervous system regulates involuntary functions like heart rate and digestion, while the somatic nervous system controls voluntary movements. The autonomic nervous system has two branches: the sympathetic and parasympathetic nervous systems, which have opposing effects on the body. The somatic nervous system mainly controls skeletal muscle movement through motor neurons.

The neurotransmitter acetylcholine is released from neuron axon terminals and binds to nicotinic receptors on muscle cells, triggering muscle contraction.

Usually when we talk about reflexes -we are referring to two things: primary sensory processing (peripheral nervous system) followed by a motor response (central nervous system). These types of reflexes do not require higher-order cognitive function to occur - but the brain is made aware of what is going on, presumably so that we learn to avoid the harmful stimulus in the future.

For example, the accidental placement of a hand on a hot surface would usually result in an immediate withdrawal reflex. What's happening here is that pain receptors in the skin - in this case 'nociceptors' activated by thermal stimuli - send impulses to neurons in the spinal cord (the spinal cord is part of the central nervous system) that share circuits with neurons that control muscle contractions. These in turn fire, resulting in an immediate flexion (movement toward the body) of the affected limb.

Yes, the sodium-potassium ATPase pump helps maintain the resting membrane potential of cells by transporting three sodium ions out of the cell and two potassium ions into the cell for every ATP hydrolyzed. This generates a net positive charge outside the cell and a negative charge inside the cell, contributing to the overall negative resting membrane potential of the cell.

The parasympathetic nervous system (PNS) is the exact opposite of the sympathetic nervous system (SNS). It will usually stop, decrease, or slow down any kinds of action.

For example, the SNS will increase the heart rate when you exercise, while the PNS will decrease the heart rate when you stop exercising.

In the reflex arc, a muscle or gland is considered to be the effector. Its role is to respond to the stimulus provided by the sensory neuron and produce the appropriate action, such as muscle contraction or gland secretion.

1 system involves the spine and the brain. this is called the central nervous system.the second system only incolves the spinal chord. peripheral nervous system

somatic nervious system and the autonomic nervous system

the skull

When the electrical impulse from a nerve stops, the muscle relaxes and returns to its resting state. This is because the nerve impulse initiates the release of calcium ions in the muscle cells, leading to muscle contraction. When the nerve impulse stops, the calcium ions are reabsorbed, causing the muscle to relax.

A neurologist is a medical specialist who diagnoses and treats disorders related to the nervous system, which includes the brain, spinal cord, and nerves. They help patients with a range of conditions such as epilepsy, stroke, and multiple sclerosis.

1. The nervous system is composed of the peripheral nervous system (PNS) and the central nervous system (CNS)
2. Every neuron has a cell body and nerve fibers.
3. Neurons can be classified three different ways regarding their structure.- 1. Bipolar- has two nerve fibers, one arising from each end. 2. Unipolar- has a single nerve fiber that extends from the cell body and then divided into two branches. 3. Multipolar- have many nerve fibers arising from the cell body
4. There are two types of nerve fibers. Dendrites transmit impulses to the cell body and the axon transmits impulses away from the cell body.
5. Many axons are covered with myelin. Myelin is largely composed of a lipid protein. It forms around the axon and protects it.
6. Their are cells in the nervous system called Neuroglial cells. These cells fill spaces, support neurons, provide framework for structure, produce myelin, and carry out phagocytosis.
7. Sensory nerves- nerves that conduct impulses into the brain or spinal cord.
8. Motor nerves- nerves that carry impulses to muscles or glands.
9. Mixed nerves- consists of most nerves. These include both sensory and motor nerve fibers.
10. Meninges protect the CNS (brain and spinal cord). Meninges have three layers, the dura mater, arachnoid mater, and the pia mater.
11. The peripheral nervous system (PNS) can be divided into the somatic nervous system and the autonomic nervous system.