Relationship between body systems and chemicals

Body system communication

relationship between body systems and chemicals

We are all familiar with many of the organ systems that comprise the body of Homeostasis is a term coined in to describe the physical and chemical The difference between homeostasis as a single cell performs it and what a. All of the systems within the body interact with one another to keep an organism These chemicals are important for metabolism, growth, water and mineral. Organs and organ systems represent the highest levels of the body's organization Chemicals — atoms or molecules that are the building blocks of all matter.

The stomach is involved only in the digestion of food as part of the digestive system. Organ systems, such as the digestive system, are collections of organs that perform a major function for the organism.

Homeostasis Back to Top Homeostasis is the maintenance of a stable internal environment. Homeostasis is a term coined in to describe the physical and chemical parameters that an organism must maintain to allow proper functioning of its component cells, tissues, organs, and organ systems.

Recall that enzymes function best when within a certain range of temperature and pH, and that cells must strive to maintain a balance between having too much or too little water in relation to their external environment. Both situations demonstrate homeostasis. Just as we have a certain temperature range or comfort zoneso our body has a range of environmental internal as well as external parameters within which it works best.

Multicellular organisms accomplish this by having organs and organ systems that coordinate their homeostasis. In addition to the other functions that life must perform recall the discussion in our Introduction chapterunicellular creatures must accomplish their homeostasis within but a single cell! Single-celled organisms are surrounded by their external environment. They move materials into and out of the cell by regulation of the cell membrane and its functioning.

Most multicellular organisms have most of their cells protected from the external environment, having them surrounded by an aqueous internal environment. This internal environment must be maintained in such a state as to allow maximum efficiency. The ultimate control of homeostasis is done by the nervous system. Often this control is in the form of negative feedback loops.

Heat control is a major function of homeostatic conditions that involves the integration of skin, muscular, nervous, and circulatory systems.

The difference between homeostasis as a single cell performs it and what a multicelled creature does derives from their basic organizational plan: The carting away of these wastes is accomplished in my body by the circulatory system in conjunction with the excretory system. For my house, I have the City of Phoenix sanitation department do that and get to pay each month for their service!

Neuroscience Resources for Kids - Body System Interaction

The ultimate control of homeostasis is accomplished by the nervous system for rapid responses such as reflexes to avoid picking up a hot pot off the stove and the endocrine system for longer-term responses, such as maintaining the body levels of calcium, etc.

Often this homeostatic control takes the form of negative feedback loops. There are two types of biological feedback: Negative feedback turns off the stimulus that caused it in the first place. When your house cools off below the temperature set by your thermostat, the heater is turned on to warm air until the temperature is at or above what the thermostat is set at. The thermostat detects this rise in temperature and sends a signal to shut off the heater, allowing the house to cool of until the heater is turned on yet again and the cycle or loop continues.

relationship between body systems and chemicals

Positive feedback causes an amplification of the stimulus by the reaction. Examples of each will be presented below.

Internal components of homeostasis: Concentration of oxygen and carbon dioxide pH of the internal environment Concentration of nutrients and waste products Concentration of salt and other electrolytes Volume and pressure of extracellular fluid Control Systems Back to Top Open systems are linear and have no feedback, such as a light switch.

Tissues, organs, & organ systems

Closed Systems has two components: Most physiological systems in the body use feedback to maintain the body's internal environment. Extrinsic Most homeostatic systems are extrinsic: Endocrine and nervous systems are the major control systems in higher animals. The nervous system depends on sensors in the skin or sensory organs to receive stimuli and transmit a message to the spinal cord or brain.

Sensory input is processed and a signal is sent to an effector system, such as muscles or glands, that effects the response to the stimulus.

relationship between body systems and chemicals

The endocrine system is the second type of extrinsic control, and involves a chemical component to the reflex. Sensors detect a change within the body and send a message to an endocrine effector parathyroidwhich makes PTH. PTH is released into the blood when blood calcium levels are low.

PTH causes bone to release calcium into the bloodstream, raising the blood calcium levels and shutting down the production of PTH. Some reflexes have a combination of nervous and endocrine response.

relationship between body systems and chemicals

The thyroid gland secretes thyroxin which controls the metabolic rate into the bloodstream. Falling levels of thyroxin stimulate receptors in the brain to signal the hypothalamus to release a hormone that acts on the pituitary gland to release thyroid-stimulating hormone TSH into the blood.

TSH acts on the thyroid, causing it to increase production of thyroxin. Intrinsic Local, or intrinsic, controls usually involve only one organ or tissue. When muscles use more oxygen, and also produce more carbon dioxide, intrinsic controls cause dilation of the blood vessels allowing more blood into those active areas of the muscles.

Eventually the vessels will return to "normal". Feedback Systems in Homeostasis Back to Top Negative feedback control mechanisms used by most of the body's systems are called negative because the information caused by the feedback causes a reverse of the response.

TSH is an example: Positive feedback control is used in some cases.

Body system communication

Input increases or accelerates the response. During uterine contractions, oxytocin is produced. Oxytocin causes an increase in frequency and strength of uterine contractions.

relationship between body systems and chemicals

This in turn causes further production of oxytocin, etc. Homeostasis depends on the action and interaction of a number of body systems to maintain a range of conditions within which the body can best operate.

Body Systems and Homeostasis Back to Top Eleven major organ systems are present within animals, although some animals lack one or more of them. The vertebrate body has two cavities: The head, or cephalic region, contains four of the five senses as well as a brain encased in the bony skull. These organ systems can be grouped according to their functions.

relationship between body systems and chemicals

The integumentary, skeletal, and muscular systems. Image from Purves et al. Muscular System shown in Figure 1 facilitates movement and locomotion. Driver The human body responds to hormones in a sustained, widespread way. Students will have heard about hormones especially in relation to pimples and the contraceptive pillbut they are likely to be confused about how they function. Their everyday experiences may mean that some students are more familiar with certain hormone functions such as diabeticsthan others such as happiness as a result of the actions of endorphins.

Tissues, organs, & organ systems (article) | Khan Academy

Students often hear about hormones in the media. For example, they may have heard that chickens are fed hormones and that when humans eat these chickens they are affected in different ways, such as faster maturation of children. However, students have little knowledge of how this may occur. They may also have heard about the use of growth hormone by athletes, though they are likely to be confused about its source or the details of its role.

Driver Scientific view Humans have two types of communication systems. These are the nervous system and the endocrine hormone system.

These systems regulate body processes through chemical and electrical signals that pass between cells. The pathways for this communication are different for each system. Responses of the hormone system affect cells that are likely to be widely distributed throughout the body, such as the hormones involved in sexual maturation, whereas the actions of nerves are likely to be more targeted.

Critical teaching ideas The nervous and endocrine systems are two forms of communication system in the human body that integrate, coordinate and respond to sensory information which is received by the human body from its surroundings.

In both the nervous and the endocrine system signals are passed from one cell to another by chemical communication.

In the nervous system, nerve cells send messages electrochemically: This response is targeted and short lived.