Contraction of these muscles moves the bones and accomplishes such movements as walking, running, breathing, eating, and drawing. In some cases, they attach to soft tissue structures and accomplish such movements as smiling and moving the eyeball as when reading. In this article, the anatomy of...
1. A Muscle Contraction Is Triggered When an Action Potential Travels Along the Nerves to the Muscles Muscle contraction begins when the nervous system generates a signal. The signal, an impulse called an action potential, travels through a type of nerve cell called a motor neuron. The neuromusc...
III. Types of Contractions Part 2 Sliding Filament Theory A. Graded response = “all or none” law to muscle cell not whole muscle; full contraction never partial 1. Twitches (sometimes brief and jerky)= nerve impulses are rapid, contractions are summed up which creates a smooth sustained co...
Erection-causing stimuli reachthresholdThresholdMinimum voltage necessary to generate an action potential (an all-or-none response)Skeletal Muscle Contraction→ induce spinal reflex (at the L1 and L2 level) Causes sympathetic stimulation of genital organs: ...
Z lineZ lineSkeletal Muscle Contraction(also known as thesquamocolumnar junction):transition from squamous to columnarepitheliumEpitheliumThe epithelium is a complex of specialized cellular organizations arranged into sheets and lining cavities and covering the surfaces of the body. The cells exhibit polarit...
Contraction of the abdominal head of the pectoralis major moves the arm in two different directions depending on the starting location of the arm. When the arm is in the anatomical position (hanging down along the side of the body with palm facing forward), the abdominal head works with the...
Explore the human body's muscle anatomy and learn the names of the major muscles and what they do. Identify muscles on the body and know their...
2. Muscle contraction In the gastrointestinal (GI) tract, smooth muscle contractions are classified as either tonic (e.g. continuous) or phasic (e.g. rhythmic). Both are important for the maintenance of a proper GI function. Unlike skeletal contractions that require a direct motor neuron to ...
200 WK1: Basic Foundations and Terminology of Functional Anatomy 45個詞語 luckieduc 預覽 Lecture 10: T&M for Nervous System 36個詞語 natalia_vanderzanden 預覽 A&P II Respiratory System Exam 192個詞語 swimgirlnatalie 預覽 muscle OIAs 41個詞語 bethany_mapes 預覽 Human Anatomy - Word Parts 26個詞語...
- unilateral contraction produces grinding action - Transverse motion mediated by temporalis and lateral pterygoid Mandibular Elevators - Masseter - Temporalis - Medial (Internal) Pterygoid Masseter - most powerful muscle of mastication - thick, flat muscle covering lateral aspect of mandibular ramus ...