blood pressure increases. If a stimulus causes blood pressure to rise the following sequence of events occurs. Baroreceptors (the receptors) pressure-sensitive nerve cells located in the walls of certain blood vessel‚ detect the higher pressure. The baroreceptors send nerve impulses (input) to the brain (control center). The brain nerve impulses (output) to the heart and blood vessels (the effectors). Heart rate decreases and blood vessels dilate (widen)‚ which cause blood pressure to decrease (response)
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understand how a neuromuscular blocking agent works one must first understand the process of muscle contraction and what has to take place in order for us to be able to move our muscles. To create a muscle contraction your brain sends a message (nerve impulse) to your muscles via axon extensions. The end of this axon forms a union with a single muscle fiber; this union is called the neuromuscular junction. The axon terminal and the muscle fiber don’t actually touch at this junction; they are attached
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cord injury is harm to any a part of the funiculus or nerves at the tip of the epithelial duct and sometimes causes permanent changes in strength‚ sensation and different body functions below the location of the injury. What happens when you have a spinal cord injury? It can cause an accident that causes your vertebrae to interrupt may also harm your neural structure. And once the neural structure is broken‚ the route is closed. Nerve impulses can’t get through. This ends up in dysfunction and loss
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Homeostasis is when the body maintains a constant balance through a series of monitored adjustments. Homeostasis must occur in animals in order for them to maintain a constant balance‚ despite the changes in the internal or external environment. Cells in animals are dependent on the internal and external environment in order for them to function. Homeostasis allows to the body to maintain a constant value in order for the cells to stay constant. An example of homeostasis is Thermoregulation. Thermoregulation
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belief that the flow of animal spirits caused behaviors. He held a mechanistic view arrived at because of the statues of St. Germaine. Descartes thought humans followed the same pattern as the statues with water flowing through tubes‚ representing nerves and the fluid that result in muscle stimulation (Millis‚ n.d.). In 1664 Thomas Willis published Anatomy of the Brain. The publication viewed the brain’s structures as
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the body it makes it’s way to the spinal cord via the peripheral nervous system’s afferent nerves (nerves that carry impulses toward the CNS). Once the virus gets into the spinal cord‚ it’s quickly sent up to the brain‚ where it begins replicating itself inside the mind’s nerve cells‚ destroying them in the process (C.O.). When it reaches the brain it moves through the efferent nerves (they carry impulses from the CNS) to the salivary‚ glands‚ they cause increased salivation. The virus does that
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Tissues Tissues are sets of the same cells carrying out particular functions these include; epithelial‚ connective‚ muscle and nervous. Epithelial tissues are the inside layer of internal and external surfaces and body cavities‚ including ducts carrying secretions from glands. They may be composed of some layers of cells‚ called compound epithelia or just a single layer which is known as simple epithelia. The lowest or bottom layer of cells is attached to the basement membrane for support and
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ANIMAL ORGANIZATION AND HOMEOSTASIS QUIZ NOTE: THIS SECTION ALSO INCLUDES THE INTEGUMENTARY SYSTEM _____1. Which gives the correct sequence of increasing organizational complexity? a) organ‚ tissue‚ cell‚ organ system‚ organism b) cell‚ organ‚ organ system‚ tissue‚ organism c) cell‚ tissue‚ organ‚ organ system‚ organism d) organism‚ tissue‚ cell‚ organ system‚ organ e) tissue‚ cell‚ organ system‚ organism‚ organ _____2. Which type of tissue lines body cavities and covers body surfaces
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Question 1 Skeletal System The skeletal system is a strong yet light‚ flexible living framework that supports the body‚ protects delicate internal organs and makes movement possible. In addition‚ our bones store minerals while red bone marrow produces blood cells. Support The skeleton provides a frame that shapes the body and holds it up. Within the skeleton different characteristics of support can be identified. As the body’s main axis‚ the backbone provides support to the trunk with its upper
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inner ear consists of the spiral-shaped cochlea (an ancient Greek word for the shell of a snail). The passageways of the cochlea are lined with about 20‚ 000 microscopic hair cells that convert sound vibrations into nerve impulses which are then sent to the brain. Here‚ these impulses are interpreted as meaningful sounds. There are only 15‚000 hair cells to perform this analysis‚ and they pass the information to the auditory
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