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What are blood vessel size directly and indirectly controlled by?

The vascular system signals for blood vessels to constrict or dilate. The nervous system, such as the spine, and the brain, work together to help blood vessels respond accordingly.


What branch of the autonomic nervous system causes dilation of the blood vessels supplying skeletal muscles and the heart?

The sympathetic system causes the vessels to constrict (shut blood to core systems) and is often called the fight or flight response. The parasympathetic system causes the vessels to relax and is often called the feed and breed response.


How does the sympathetic nervous system impact blood pressure regulation?

The sympathetic nervous system can increase blood pressure by causing blood vessels to constrict and the heart to beat faster. This response is part of the body's fight-or-flight reaction to stress or danger.


Do dendrites send or receive signals in the nervous system?

Dendrites receive signals in the nervous system.


How does an increase in sympathetic nervous system activity affect blood pressure?

An increase in sympathetic nervous system activity can lead to higher blood pressure. This is because the sympathetic nervous system releases hormones like adrenaline, which can cause blood vessels to constrict and the heart to beat faster, resulting in elevated blood pressure.


How does the sympathetic nervous system contribute to an increase in blood pressure?

The sympathetic nervous system increases blood pressure by releasing adrenaline, which causes blood vessels to constrict and the heart to beat faster and stronger. This response helps the body prepare for fight or flight situations.


What signals do the respiratory system depend on from the nervous system?

Nervous system sends controlling signals to respiratory system via nerves of autonomic system, these signals arise from breathing center of medulla .


What tissue transmits electrical signals?

neurons


How many nerves are in the nervous system?

There are billions of nerves in the nervous system. The nervous system is responsible for transmitting signals throughout the body.


What part of the nervous system sends signals to the muscles?

The motor neurons of the peripheral nervous system send signals from the central nervous system to the muscles, causing them to contract and move. These signals are transmitted through neurotransmitters released at the neuromuscular junction.


Cells that transmit electrical signals through the nervous system to various organs in the body are called?

Neurons are the cells that transmit electrical signals through the nervous system to various organs in the body. They are specialized cells that can receive, process, and transmit information via electrical and chemical signals.


What system controls organisms through chemical signals?

The nervous system