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- Most has collagen and elastin fibers. a. muscle tissue b. nervous tissue c. connective tissue d. epithelical tissueConnective tissue is made of which three essential components? cells, ground substance, and carbohydrate fibers cells, ground substance, and protein fibers collagen, ground substance, and protein fibers matrix, ground substance, and fluidYou are watching cells in a dish spontaneously contract. They are all contracting at different rates; some fast, some slow. After a while, several cells link up and they begin contracting in synchrony. Discuss what is going on and what type of cells you are looking at.
- Identify and describe the tissues shown below.Figure 33.11 Which of the following statements about types of epithelial cells is false? Simple columnar epithelial cells line the tissue of the lung. Simple cuboidal epithelial cells are involved in the filtering of blood in the kidney. Pseudostratisfied columnar epithilia occur in a single layer, but the arrangement of nuclei makes it appear that more than one layer is present. Transitional epithelia change in thickness depending on how full the bladder is.Which of the following is the epithelial tissue that lines the interior of blood vessels? columnar pseudostratified simple squamous transitional
- Watch this video (http://openstaxcollege.org/l/musctissue) to learn more about muscle tissue. In looking through a microscope how could you distinguish skeletal muscle tissue from smooth muscle?Watch this short video (http://openstaxcollege.org/l/facialnerve) to see an examination of the facial nerve using some simple tests. The facial nerve controls the muscles of facial expression. Severe deficits will be obvious in watching someone use those muscles for normal control. One side of the face might not move like the other side. But directed tests, especially for contraction against resistance, require a formal testing of the muscles. The muscles of the upper and lower face need to be tested. The strength test in this video involves the patient squeezing her eyes shut and the examiner trying to pry her eyes open. Why does the examiner ask her to try a second time?Why are intercalated discs essential to the function of cardiac muscle? The discs maintain the barriers between the cells The discs pass nutrients between cells The discs ensure that all the cardiac muscle cells beat as a single unit The discs control the heart rate.
- The micrograph to the left shows cells from the lining of an airway leading to the lungs. The gold cells are ciliated and the darker brown ones secrete mucus. What type of tissue is this? How can you tell?Each level of biological organization has emergent properties that arise from the interaction of its component parts. For example, cells have a capacity for inheritance that molecules making up the cell do not. What are some emergent properties of specific types of tissues?The four primary types of tissue are __________________, _________, _________, and __________________.
