The Muscular System: Contraction of Motor Units 1. Define a motor neuron:_____A single nerve cell that branches from the brain or the spinal cord to a muscle or a gland. 2. Define a motor unit: ___A motor neuron and all of the muscle fibers it stimulates. 3. The synapse between a motor neuron and the muscle it innervates is called a ____neuromuscular junction_______. 4. The stimulation of additional motor units will increase the strength of the contraction. This process is called
Premium Muscle Nervous system Nerve
Biology 64 Instructor: Chooljian Lecture Exam #2 Review FIRST: Be sure to: Review the lecture notes and .pdfs Know all anatomical terms in chapters in boldface type and be able to define them Study the “Concept Check” at the end of each topic section in the text Skeletal System (Chapters 5-7) 1. What are the functions of the skeletal system? 2. Know the terminology for a long bone (epiphysis‚ etc.) 3. What is periosteum? Endosteum? What structures/cells can be
Premium Skeletal system Muscle Bone
that is planned‚ structured‚ and repetitive‚ and that results in improvements is fitness Muscular endurance-ability to perform repeated‚ high intensity muscle contraction Muscular strength-maximum force applied with a single muscle contraction Physical activity-any movement that works the larger muscles of the body‚ such as arm‚ leg‚ and back muscles Physical fitness-the body’s ability to carry out daily tasks and still have enough reserve energy to respond to unexpected demands Power-rate of force
Premium Muscle
Carbon‚ Hydrogen‚ Oxygen‚ Nitrogen‚ Phosphorus‚ Calcium‚ Sulfur d. Examples of biological molecules: DNA‚ glucose‚ phospholipids Cellular level – molecules combine to form cells e. Cells are the basic units of life f. Examples of cells: smooth muscle cells‚ nerve cell‚ epithelial cells Tissue level – groups of cells and material surround the cells that work together to perform a particular function g. 4 basic types of tissue: epithelial‚ connective‚ muscular‚ nervous Organ level – different
Premium Connective tissue Epithelium Skin
Understanding Words * acetabul-: vinegar cup * adip-: fat * aer-: air * alb-: white * an-: without * ana-: up * anul-: ring * Apo-: away from * Append-: “to hang something”; * arth-: joint * Astr-: starlike * aud-: to hear * Ax-: axle * ax-: axis * Bi-: two * Bio-: life * blast: bud * burs-: bag‚ purse * calat-: something inserted * canal-: channel * Cardi-: referring to the heart * carp-: wrist
Premium Neuron Nervous system Neurotransmitter
is vital to produce muscle contractions. And energy is produced from foods consumed but mainly carbohydrates and fats. * Carbohydrates – carbohydrates are broken down by the body into glucose‚ a simple sugar. If the body does not require it immediately it is stored in the liver and muscles. * Fats – broken into fatty acids When our body burns these substances it produces ATP and once the chemical bond in the ATP is broken it produces energy for muscular contractions. Only ATP can provide
Premium Adenosine triphosphate Muscle Exercise physiology
dry mouth‚ and muscle weakness clearly illustrate a correlation between botulism and the muscular system. Synaptic transmission at a motor end plate normally begins when a nerve impulse reaches a synaptic terminal. Synaptic vesicles then travel towards and combine into the presynaptic cell membrane of the motor neuron. This stimulates the release of acetylcholine‚ which diffuses across the synaptic cleft and binds to receptors on the postsynaptic cell membrane of a muscle fiber. When a botulin
Premium Action potential Neuron Neuromuscular junction
the first things discussed in the lecture on muscle tissue was the different types of muscle tissue. The primary one that we discussed was skeletal muscle‚ which is the most prominent form of muscle tissue in the body and is responsible for almost all movement that we are capable of. Skeletal muscles are the only type that are voluntary‚ meaning that we can control them through our nervous system to both contract and relax. However‚ some skeletal muscles that are responsible for maintaining posture
Premium
decline in muscle function contribute to eye strain and blurred vision? When light is refracted into the eye through the lens it hits a point called the fovea centralis‚ which focuses the light with the use of cones and sends a message to the brain. When the cilliary body doesn’t help the lens to focus and achieve the message signal to the brain‚ we get double vision. 4. What are the possible reasons for Annie’s condition? lack of oxygen in the bloodstream which would cause muscle crams and
Premium Action potential Muscle Neuromuscular junction
completed as fast as possible. Elite performers cover the final lap in times of between 10 and 11 seconds. (a) Name the main energy system being used in the final sprint to the finishing line and explain how this system provides energy for the working muscles. (4 marks) (b) At the end of the race‚ the cyclist will be out of breath and will continue to breathe heavily even though they have come to a complete rest. Explain why this breathlessness occurs. (4 marks) ENERGY SOURCES The triathlon is an athletic
Premium Muscle Newton's laws of motion Glycogen