History: Dna and Blood Vessels Essay

Submitted By PatrickDugom1
Words: 1477
Pages: 6
Open Document
Unit 3 Lecture Study Guide
1. List the 4 primary tissue types and give the general characteristics and functions of each one.
Epithelium: Covers the body and many of its parts (skin). Because epithelial cells are packed so close together, they form continuous sheets that contain no blood vessels.
Protects from injury, contains receptors which respond to stimuli, and filters and secretes materials and secretes serous fluids.
Connective: Most abundant and widely distributed tissue. Connects, binds, and supports structures, protects and cushions organs and tissues, insulates fat, and transports substances such as blood.
Muscle: Associated with the bones of the skeleton, the heart and in the walls of the hollow organs of the body. Helps with movement, locomotion, maintain posture, producing heat, facial expressions, pumping blood, and peristalsis.
Nervous: The main component of the nervous system. Regulates and controls body functions, generates and transmits nerve impulses, and supports, insulates and protects impulse generating neurons.
1. How are epithelial tissues classified?
Simple (one layer of cells) or stratified (more than one layer).
1. How does the type of epithelial tissue relate to its function? Give at least 1 example of where you would find each type of epithelial tissue.
Squamous: Simple, forms solid layer of cells that line blood vessels, body cavities, & cover organs in the body cavities. Stratified, forms epidermis. Located in the lining of the heart, blood and lymphatic vessels, alveoli of the lungs, and the lining of the serous membranes.
Cuboidal: Simple, roughly cube shaped, lines ducts in kidneys where reabsorption and secretory activities take place. Located in kidney tubules, glands and their ducts, choroid plexus of the brain, and surface of the ovaries.
Columnar: Simple, column shaped, lines the digestive tract where reabsorption and secretion occurs. Located in glands, some ducts, bronchioles of lungs, uterus, uterine tubes, stomach, small and large intestines.
1. Differentiate between exocrine and endocrine glands. Give an example of each.
Exocrine glands are open to the exterior of the body via ducts (sweat, oil). Endocrine glands have no contact with the exterior of the body, are ductless, and produce hormones (pituitary, thyroid, adrenals, pancreas).
1. What is the difference between apocrine, merocrine and holocrine glands? Which is the most common?
Apocrine: Fragments of the gland go into the secretion, apex of cell pinches off. (Mammary glands)
Merocrine: No loss of cytoplasm, secretion leaves by exocytosis. (Sweat glands, pancreas, and salivary glands)
Holocrine: Whole cell becomes part of secretion, secretion accumulates in cell and the cell ruptures and dies. (Sebaceous glands)
The most common of these is merocrine
1. Describe connective tissue’s intercellular material.
The intercellular substance (matrix) consists of fibers (collagenous, elastic, reticular), amorphous ground substance (glycoproteins, proteins, proteoglycans) and tissue fluid.
1. What are the 8 main types of connective tissue? Briefly describe each.
Bone: Tissue composed of bone cells, provides exceptional protection and support.
Cartilage: Less hard and more flexible than bone, found in few places in the body such as the ear.
Dense: Makeup tendons and ligaments as well as the lower layers of skin.
Loose: Softer, have more cells and fewer fibers than the other types.
Areolar: soft tissue that cushions and protects body organs.
Adipos: Often called fat tissue; tissue beneath the skin, insulates body, protects organ, stored for energy in hips, stomach, and breasts.
Reticular: located in lymphoid organs such as lymph nodes, spleen, and bone marrow.
Blood: carries nutrients, waste, respiratory gases and other substances throughout the body.
1. Order the types of connective tissue from most rigid to softest. Be sure that you understand why?
Bone, cartilage, dense, loose, blood.
1.
Show More

Related Documents: History: Dna and Blood Vessels Essay

Sympathetic Nervous System Research Paper

parts of our body which are needed to deal with the stress would be supplied by enough oxygenated blood to remain functional until the stressful situation is over. It shoots up sugar and fat levels. Sugars and fats provides our body with energy. During stressful situations, we need more energy to be able to deal with it. The sympathetic nervous system can also enhances mental activity, slow down blood clotting time, and dilates our pupils among several other helpful coping mechanisms. When we are…

Words 634 - Pages 3

EOC Study Guide Essay

or aberration is a missing, extra, or irregular portion of chromosomal DNA. 2. Nondisjunction is the failure of chromosome pairs or sister chromatids to separate properly during cell division. An example is Pallister-Killian syndrome. 3. A human cell contains twenty-three pairs of autosomal chromosomes. 4. A human cell contains two sex chromosomes. 5. The components of a DNA molecule consist of two separate strands of DNA running in opposite directions. The three major components in each strand…

Words 3847 - Pages 16

BIOLOGY GRADE 11 NOTES Essay

Biology Grade 11 Exam Study Guide Diversity Taxonomic Categories Domain Kingdom Phylum Class Order Family Genus Species Hierarchy From most general to most specific Binomial Nomenclature System used to identify all organisms on Earth Identifies an organism by its genus and species (ex. Humans-homo sapiens) Developed by Linnaeus in the 18th century Identifying Species 3 methods: Morphology  Form and shape  It is simple but there are natural variations in population Biology…

Words 6699 - Pages 27

Is Animal Testing Wrong

Animal Experimentation : Is It Wrong To Experiment On Animals? There is an ongoing battle between animal rights activists and scientific researchers on the topic of Animal Experimentation. A scientific researcher, Gina Solomon, said, “While we would prefer not to sacrifice a single laboratory rat, we believe that the sacrifice is warranted to protect our children and future generations.” These experiments on animals are needed for the greater good. Animal experimentation is essential for the discovery…

Words 1777 - Pages 8

Type 2 Diabetes Mellitus Research Paper

the body cannot use the sugar (or glucose) in the blood to make energy; therefore the glucose stays in the bloodstream. This can lead to high glucose levels. Over time and if left untreated, high blood glucose levels in the body can cause serious damage to a person’s vision, kidneys, nervous and cardiovascular systems. “Millions of Americans and hundreds of millions…

Words 1366 - Pages 6

Cancer Research Paper

been continuous for centuries, the most significant conclusions have been drawn in the twentieth century. In 1950, Frank L. Horsfall, Jr. was concerned in discovering the causes of cancer. He thought that changes in the cell came from a change in DNA. Horsfall's finding that cancer is attributed to changes in the nucleic acid of cells provided a unifying concept for studying cancer. Approximately fifty years prior to Horsfall's observations, Peyton Rous was attracted in the physiology of cancer…

Words 1810 - Pages 8

Essay on History Of A P And Levels Of Organization

History of Anatomy and Physiology & Chapter 1 The Sciences of Anatomy and Physiology; McKinley, Michael P Instructor Jennifer Evens What is…? • Anatomy – Study of structure • Physiology – Study of function Complimentary/not separable/form and function When you see a structure you ask how does it work. Anatomy make it possible Comparison of Anatomy and Physiology (Table 1.1) Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Figure 1.1a ANATOMISTS…

Words 1610 - Pages 7

Allele and Red Blood Cells Essay

i.e. black and white coats in animals, AB blood type in humans. IV. Multiple Alleles A. There are multiple (more than 2) versions of the same basic allele. B. The glycoprotein “hands” of red blood cells is a classic example. These “hands” (antigens) identify the blood types. One dominant allele results in the presence of A antigens on the surface of red blood cells. Another dominant allele results in the presence of B antigens on the surface of red blood cells. A third allele results in no antigen…

Words 965 - Pages 4

Biology Exam Revision Notes: The Five Kingdoms

Biology Unit 2 Exam Revision Notes The Five Kingdoms Prokaryotes E.g. Bacteria • no nucleus • loop of naked DNA • DNA not arranged in linear chromosomes • no membrane-bound organelles • smaller ribosome’s than other groups • carry out respiration on mesosome’s (special membrane systems), not mitochondria • Taxonomic Hierarchy Domain Kingdom Phylum Class Order Family Genus Species smaller cells than eukaryotes • parasitic (some cause disease) Protoctista E.g. Algae…

Words 7251 - Pages 30

Xeroderma Pigmentosum Essay

disorder, which is a form of cell that loses its ability to repair DNA. The sun can affect every part of the epidermis, which is the top layer of your skin. It makes your skin sensitive to the ultraviolet rays. The loss of un- repaired DNA builds up and causes cancerous cells. That is why when a patient is diagnosed with XP, they can’t be expose to the sunlight because of the ultraviolet rays. Usually the patients family history plays a role in this condition, once they have been diagnosed with…

Words 1159 - Pages 5