What function detects changes inside and outside the body?

What function detects changes inside and outside the body?

Millions of sensory receptors detect changes, called stimuli, which occur inside and outside the body. They monitor such things as temperature, light, and sound from the external environment.

Which nerves are responsible for external changes in the body?

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.

How the signals are conveyed to central nervous system in our body?

Sensory afferent neurons convey information from tissues and organs into the central nervous system. Efferent neurons transmit signals from the central nervous system to the effector cells and are sometimes called motor neurons. Interneurons connect neurons within specific regions of the central nervous system.

What are the three divisions of the nervous system?

The central nervous system (CNS) is the brain and spinal cord, and the peripheral nervous system (PNS) is everything else (Figure 8.2). The brain is contained within the cranial cavity of the skull, and the spinal cord is contained within the vertebral cavity of the vertebral column.

How does the nervous system coordinate movement of limbs etc?

To create voluntary movement the CNS processes sensory information supplied by the eyes, ears and other sense organs and receptors of the body. It then selects the appropriate response, plans, and then carries out the movement by sending nerve impulses through the motor branch of the peripheral nervous system.

What is the function of connective tissue in the body?

Connective tissue, as its name implies, binds the cells and organs of the body together and functions in the protection, support, and integration of all parts of the body.

What kind of tissue covers the exterior of the body?

Epithelial tissue, also referred to as epithelium, refers to the sheets of cells that cover exterior surfaces of the body, lines internal cavities and passageways, and forms certain glands.

Which is an example of an excitable tissue?

Nervous tissue is also excitable, allowing the propagation of electrochemical signals in the form of nerve impulses that communicate between different regions of the body (Figure 4.1. 1 ). The next level of organization is the organ, where several types of tissues come together to form a working unit.

Which is the next level of organization of tissues?

The next level of organization is the organ, where several types of tissues come together to form a working unit. Just as knowing the structure and function of cells helps you in your study of tissues, knowledge of tissues will help you understand how organs function.

the component of a connective tissue between the cells and fibers, supports cells, binds them together, and provides a medium through which substances are exchanged between the blood and cells. plays an active role in how tissues develop, migrate, proliferate, and change shape, and in how they carry out their metabolic functions.

Which is the most important tissue in the body?

Epithelial tissue. covers body surfaces; lines body cavities, hollow organs, and ducts (tubes); and forms glands. Connective tissue. protects and supports the body and its organs, binds organs together, stores energy reserves as fat, and provides immunity.

Why are mast cells important to connective tissue?

Mast cells are abundant alongside the blood vessels that supply connective tissue. They produce histamine, a chemical that dilates small blood vessels as part of the inflammatory response, the body’s reaction to injury or infection. Can also kill bacteria.

What does epithelial tissue do in the body?

Epithelial tissue covers body surfaces; lines body cavities, hollow organs, and ducts (tubes); and forms glands. protects and supports the body and its organs, binds organs together, stores energy reserves as fat, and provides immunity. generates the physical force needed to make body structures move.