UNC, BIOL 252

Excerpt: ... Muscular System Assigned Readings: Chapter 9 (all of it pp. 247-283) Lecture Outline I.Overview of Muscle Tissue s A. Types of Muscle Tissue 1. Skeletal muscle long, cylindrical, multinucleate cells; obvious striations, perform voluntary movement, locomotion, manipulation of environment, associated with bones and extremities 2. Cardiac muscle branching, striated, generally uninucleate cells, involuntarily controlled 3. Smooth muscle spindle shaped cells with central nuclei; no striations, cells arranged to form sheets, involuntarily controlled B. Functional Characteristics of Muscle Tissue 1. Excitability - will respond and conduct electrical impulses 2. Contractility can shorten their length substantially in synch 3. Extensibility can also be stretched out 4. Elasticity after stretching or contracting, it will return to its normal shape C. Muscle Functions 1. Produce movement 2. Maintaining posture keep spine and core in place 3. Stabilize joints tendons from muscles pass over ...

University of Hawaii - Hilo, BIOL 100

Excerpt: ... Tissue Types Major Tissue Types Epithelial Tissue Connective Tissue Muscle Tissue Nervous Tissue Epithelial Tissues Simple Squamous Epithelium Simple Cuboidal Epithelium Simple Columnar Epithelium Stratified Epithelium Pseudostratified Epithelium Transitional Epithelium Simple Squamous Epithelium Simple Squamous Epithelium Simple Squamous Cells layer of squamous cells 1 Simple Cuboidal Epithelium Simple Cuboidal Epithelium Simple Columnar Epithelium Simple Columnar Epithelium Stratified Squamous Epithelium Epidermis of the Skin cornified layer of dead cells stratified squamous epithelium 2 Pseudostratified Columnar Epithelium goblet cell Transitional Epithelium Relaxed Transitional Epithelium Connective Tissues extracelluar matrix fibroblasts collagen fibers Stretched reticular fibers elastic fibers Connective Tissues: Fibrous Connective Tissues Areolar Connective Tissue Dense Connective Tissue Elastic Connective Tissue Reticular Connective Tissue Areolar Connective Tissue 3 Dense ...

Abraham Baldwin Agricultural College, BIO 150

Excerpt: ... n fishes Nose, ear, ends of long bones and vertebrae embryo Support, protection, lowerfriction surface for joint movements 6/22/09 Adipose Tissue Stores droplets of fats Have very little matrix between the cells Protects & cushions body parts Found under the skin; functions as insulation 6/22/09 Bone Tissue Hardened structure Made out of calcium secretions Interacts with muscles to move the body 6/22/09 Blood RBC WBC Platelets 6/22/09 Muscle Tissue s One that contract or relax Consist of many cells arranged in parallel with one another arranged in tight or loose arrays Types of muscle tissue s: Skeletal Cardiac Smooth 6/22/09 Skeletal Muscle Tissue Partner of bones Has many mitochondria Striated Activated by reflexes but can also be activated under conscious control Functions in locomotion, posture, head and limb movements 6/22/09 Cardiac Muscle Tissue Found only in the heart wall Has more mitochondria than skeletal muscle tissue Less amount ...

Pima CC, DTC 201

Excerpt: ... 1 LECTURE OUTLINE - UNIT 7 Muscles and Muscle Tissue [*The following lecture outline follows your textbook very closely; read the outline and the associated sections in Chapter 9 of your textbook; be sure to view the PowerPoint version of this lecture - I have used a lot of diagrams from other textbooks to help you better understand the material] I. Muscle Overview A The main tissue in the heart, skeletal muscles, and the walls of hollow organs B. Makes up nearly half the body's mass C. Types of Muscle Tissue 1. SKELETAL muscle tissue packaged into skeletal muscles; makes up 40% of body weight 2. CARDIAC muscle tissue occurs only in the walls of the heart 3. SMOOTH muscle tissue occupies the walls of hollow organs and other diverse places in the body D. Functional Features 1. contractility long cells shorten and generate pulling forces 2. excitability electrical nerve impulse stimulates the muscle cell to contract 3. extensibility can be stretched back to its original length by contraction of an ...

Colorado, ENGL 4224

Excerpt: ... 4 June 2007 Professor Bruce Bassoff ENG 4224-100 Study Questions #1 When someone is in a state of paralysis, the person has lost the ability to move. By definition, paralysis is the result of illness, poison or injury (Oxford American Dictionary). A ...

Winona, BIOL 211

Excerpt: ... Muscular tissues, Connective tissues diseases, glands, membranes, burns and scars 10/1 What are the primary characteristics of the three types of muscle tissue ? What cell adhere to/connect with each other and the basement membrane? How are glands classified? What are the primary secretions? What is the mucus membrane? Dense Regular Connective Tissue: Note that fibroblasts (blue nuclei) are squeezed between the fibers. Muscle has the ability to shorted because of actin and myosin filaments that are inside the cells. All three types have actin and myosin, two proteins that facilitate a change in cell length (contraction) Skeletal Muscle Tissue : Voluntary control, striated appearance, multinucleate, and a short period of contraction (many mitochondria) What are the three types of muscle tissue ? Cardiac Muscle Tissue : Involuntary control, striated appearance, one nucleus/cell, and a short period of contraction (many mitochondria) Smooth Muscle Tissue : Involuntary control, no ...

Concordia MI, APAG 06

Excerpt: ... ype, the chondrocyte, is present. Its movement is through the perichondrium, and cartilage is of three main types: hyaline, fibrocartilage, and elastic cartilage. Blood is the most unusual connective tissue, since it exists in a liquid state and contains neither ground substance nor fibers. Whole blood is divided into plasma, erythrocytes, leukocytes, and thrombocytes. Muscle tissue is of three types: skeletal, visceral, and cardiac muscle. There are two principle types of cells in nervous tissue: neurons (the conducting units of the system) and special connecting and supporting cells called neuroglia. After an overall picture is created of the various types of tissue, discussion turns to tissue repair, focusing again on each type separately before examining epithelial and connective tissue membranes. Finally, the Mechanisms of Disease section focuses on tumors and cancer. Objectives After students have completed this chapter, they should be able to: 1. 2. 3. Define the term tissue. List the four major c ...

Berkeley, MCB 58168

Excerpt: ... MCB 136 Professor Terry Machen 2/26/09 Lecture 11 ASUC Lecture Notes Online is the only authorized note-taking service at UC Berkeley. Do not share, copy or illegally distribute (electronically or otherwise) these notes. Our student-run program depends on your individual subscription for its continued existence. These notes are copyrighted by the University of California and are for your personal use only. LECTURE Lets start by talking about cardiac muscle. Cardiac muscle cells, also called cardiocytes or cardiac myocytes, are relatively small. A typical cardiac muscle cell has a single and a centrally placed nucleus. A few may have two or more. Cardiac muscle tissue is found only in the heart. Cardiac muscle shares similarities with skeletal muscle. It has a striated appearance and similar contraction. As in skeletal muscle, action potentials trigger calcium release from the sarcoplasmic reticulum (SR) and the contraction of sarcomeres; it also increases the permeability of the sarcolemma to extracellul ...

Scranton, BIOL 141L

Excerpt: ... Chapter 10 Muscular Tissue Motion results from alternating contraction (shortening) and relaxation of muscles; the skeletal system provides leverage and a supportive framework for this movement. The scientific study of muscles is known as myology. Types of Muscle Tissue Skeletal muscle tissue is primarily attached to bones. It is striated and voluntary. Cardiac muscle tissue forms the wall of the heart. It is striated and involuntary. Smooth (visceral) muscle tissue is located in viscera. It is nonstraited (smooth) and involuntary. Table 4.4 compares the different types of muscle. Functions of Muscle Tissue Through sustained contraction of alternating contraction and relaxation, muscle performs four key functions. These functions are production of body movements, stabilizing body positions, moving substances within the body, and generating heat. Properties of Muscle Tissue 1. Electrical excitability is the ability to respond to certain stimuli by producing electrical s ...

McGill, BIOL 111

Excerpt: ... LAB 11 THE MAMMALS Answers to the lab manual questions: How may a plant diet influence the structure and functions of a rat's digestive system? (11-4) (This question relates to the 4th question below) The length of the digestive tract of a vertebrate is related to its diet. Herbivores require longer tracts because plant material is harder to digest (requiring more time) than meat ( muscle tissue ). The longer the tract, the more time it takes for the food to pass through it, and the more time available for digestion and absorption. So, if a rat's diet were largely plant material, they may evolve longer tracts with a large caecum. This is true for rabbits and other herbivorous vertebrates. Why would protein-digesting enzymes in the stomach normally be inactive? (11-4) To prevent digestion of the lining of the stomach. What is the role of the sodium bicarbonate released by the pancreas into the small intestine? (11-5) To neutralize the acidic secretions of the stomach that are entering the small intestine. Th ...