Tissues are classified into four basic types: epithelium, connective tissue (includes cartilage, bone and blood), muscle, and nervous tissue. The primary tissue types work together to contribute to the overall health and maintenance of the human body. Chapter 3 Recorded Lecture. After studying this chapter, you will be able to: - Describe the structure and function of the cell membrane, including its regulation of materials into and out of the cell. Energy producing metabolism and the synthesis of the macromolecules used by the cell to maintain its structure and execute its function are the principal activities of the neuronal soma. For example, living cells require a water-based environment to survive in, and there are various physical (anatomical) and physiological mechanisms that keep all of the trillions of living cells in the human body moist. Find d dx log 4 3 x A 1 3 x ln 4 B 1 x ln 4 C 1 x D 3 x ln 4 E 3 x Page 1 of 11. Also, the oligodendrocyte forming a particular myelin internode (i. the myelin between two nodes) is seldom seen directly adjacent to the myelin-wrapped process. Chapter 3 - The Cellular Level of Organization - Anatomy & Physiology OER - LibGuides at Georgia Highlands College. Do not form synapses, - have essentially only one type of process, - retain the ability to divide, and.
5 (see enlarged view). For example, when the transfer of information occurs from an axon to axon or from one terminal to another, the synapse involved is called an axoaxonic synapse. Peroxisomes are small membrane bounded organelles that use molecular oxygen to oxidize organic molecules. In the Peripheral Nervous System (PNS), Schwann cells are responsible for the myelin formation.
Aggregations of cells in the human body be classified into four types of tissues: epithelial, connective, muscle, and nervous. Microglia, in contrast to the other types of glial cells, originate from embryonic mesoderm. Note: There is more than one correct answer. These fine sheet-like processes give the protoplasmic astrocyte cell body a "fuzzy" or murky appearance under the light microscope. Chapter 15 - The Autonomic Nervous System. Chapter 17 - The Endocrine System. 14, astrocytes form a complete lining around the external surface of the CNS (glial limitans) and around blood vessels (perivascular feet). The nucleus in neurons is spherical and ranges in diameter from 3 to 18 micrometers depending on the size of the neuron. Chapter 3 cells and tissues answer key page 42. At the distal-most end of the axon and its collaterales are small branches whose tips are button-shaped cytoplasmic enlargements called terminal boutons or nerve endings. As described in Chapter 6, it also acts as a receptive area for synaptic inputs from other cells. The cells composing a tissue share a common embryonic origin. This is the choroid plexus studied in the Laboratory that is responsible for the secretion, uptake and transport of substances to and from the CSF. One of the oldest, devised by Golgi in the late 1800's, is based on the complexity of the dendritic tree of the neuron. Through this approach cells are classified as unipolar, bipolar and multipolar neurons as shown in Figure 8.
Link to a gif showing dispersion/diffusion. Keep this theme in mind as you tour the inside of a cell and are introduced to the various types of cells in the body. They are composed of three subunits that are arranged to form a 10-nm diameter tubule. Note that epithelial tissue originates in all three layers, whereas nervous tissue derives primarily from the ectoderm and muscle tissue derives from the mesoderm. Glutamine is then transported to the neuron to be re-synthesized into glutamate (see Chapter 13). For example, they utilize and respond to different neurotransmitter(s). The zygote is described as omnipotent because it ultimately gives rise to all the cells in your body including the highly specialized cells of your nervous system. Connective tissue binds the various parts of the body together, providing support and protection.
In a chemical synapse the signal is carried by a diffusable neurotransmitter. This is because thin cytoplasmic bridges connect the region of the oligodendrocyte cell body to the external wrap of myelin. Chapter 24 - Metabolism and Nutrition. The membrane lines the joint cavity and contains fibroblasts that produce hyaluronan, which leads to the production of synovial fluid, a natural lubricant that enables the bones of a joint to move freely against one another. Epithelial tissues act as coverings, controlling the movement of materials across their surface. Muscle tissue allows the body to move and nervous tissues functions in communication. In Nissl stains, the fibrous astrocytes have a nucleus essentially the same as that of the protoplasmic type with a flecked appearance. C. Fibrous astrocytes. In some regions of the neuron ER is devoid of ribosomes and is termed smooth ER. Click the identified structures on the model neuron to move to the related section. Course Hero member to access this document. Because these cells start out developmentally as bipolar neurons and then become unipolar as they mature, they are called pseudo-unipolar cells. In this chapter, you will learn about the major components and functions of a prototypical, generalized cell and discover some of the different types of cells in the human body.
17, the surface facing the ventricle contains many microvilli and cilia.
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