BIOL-2220 Study Guide - Midterm Guide: Earwax, Apocrine, Merocrine

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ambertermite938

28 Mar 2018

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Discuss the classifications of epithelial tissues how and why they are classified as they are and the functions of each. Epithelial cells are categorized by shape of the cell and layers present. Differentiate glandular epithelium from covering and lining epithelium. Glandular epithelium are the specialized cells that compose glands. These cells require energy to secrete substances into ducts or onto the surface of the body. Covering and lining epithelium can be simple, stratified, pseudostratified, cuboidal, columnar, squamous, or transitional. Define gland, and explain the difference between exocrine and endocrine glands. Glands are organs in the human body that secretes chemical substances for use in the body or for discharge into the surroundings. Endocrine glands release hormones directly into the bloodstream or tissues of the body. Exocrine glands release chemical substances through ducts to outside the body or onto another surface within the body. Discuss the structural and functional classification of glands.

Related Questions

1. What is the difference between simple, stratified and pseudostratified epithelial tissue? 2. Does the number of cell layers or the cell shape play a role in the function of the epithelial tissue? Provide three examples. 3. What are the three types of muscular tissue? For each, describe the cell shape, the type of control (voluntary or involuntary) and the presence or absence of striations. 4. What is the difference between multipolar, bipolar and unipolar neurons?

Chapter 05

1.What is thefunction of the neuroglia cells?

2.Illustrate andlabel the cell shape(s) and arrangement(s) of all epithelial tissuetypes.

3.Compare andcontrast the structure and function of the three muscletypes.

4.Cardiac musclecells differ from other muscle in part because they communicatethrough junctions called _____________.

All the questionsneed to answer 4 or 5 sentences and type the each number please.

thanks

salmonelk636

Question 4 (9 points):

To study T cell development, and self-restriction of T cells, you decide to perform some experiments. You obtain four mouse strains: B, B-MCC, K, and K-MCC. B strain mice express MHC molecules of the b haplotype (e.g. H-2K^b, H-2D^b, I-A^b) while K mice express MHC of the k haplotypes (e.g. H-2K^k, H-2D^k, I-A^k). The strains are otherwise genetically identical. B-MCC and K-MCC are identical to the B and K strains (respectively) excepts that contain a transgene encoding the antigen Moth Cytochrome which is not present in normal mice. MCC is produced as both a secreted and cytoplasmic protein and it is expressed by dendritic cells and thymic epithelial cells. You lethally irradiate groups of mice from all four strains and perform all possible bone marrow transfers among the mice. In other words, the BM of each strain is transplanted into mice of each strain, producing 16 different combinations of donor BM and recipient strain. You now take T cells from the lymph nodes of each of the 16 types of transplanted mice and test their ability to proliferate in response to MCC-presenting B cells that express only class II MHC molecule, I-A^k. Fill out the chart below by indicated which mice will have T cells that respond. Use (+) to indicated proliferation and NR to indicate a lack of proliferation. In addition, for the mice labelled a-e give a brief explanation for your answer. Include the mechanism of T cell selection experienced in thymus (positive selection, negative selection, or neglect) and the cells involved in selection (thymic epithelial cels, BM-derived APCs, or both).

Table (4 points, 0.25 points per box)

Recipient Strain Â®

BM Donor	B	B-MCC	K	K-MCC
B			c.
B-MCC			d.
K	a.	b.	e.
K-MCC

1 point for each explanation

yellowguinea-pig868

BIOL-2220 Study Guide - Midterm Guide: Earwax, Apocrine, Merocrine

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