1.The atria does not perform any contractions since it is directly linked to the SA node. The SA node is being blocked was causes no signals to be sent to the atria muscle‚ resulting in no contraction of it. On the other hand‚ there will be contraction at 40 times per minute for the atrioventricular because this node has its own pacemaker which will allow it to spontaneously contract by depolarizing without any other signal or stimulus--thus‚ even though the SA node signals are blocked‚ the ventricles
Premium Obesity Nutrition Enzyme
Lab 4: Skeletal Muscle Function Exercise 5: The Length-Tension Relationship Materials and Methods In this experiment I used a frog anesthetized with ms222. The frog’s skin is cut and removed from both the legs‚ the Achilles tendon is cut and the tendon and calf muscle are removed from the lower legs. The femur muscle is also cut. Attached to the legs are femur clamps which are connected to the transducer arm‚ stimulation electrodes are then positioned against the muscle. I plugged the output
Premium Muscle Acetylcholine Skeletal muscle
Lesson 36 Assignments Biology Muscles and the Skeleton Provide Action and Support Every movement you make or every step you take is controlled by the systems of muscles and skeleton that moves and supports the body. The human boy is a complex and elegant mechanism influenced my many factors. Both muscles and the skeleton are not only good for movement‚ they also influence crucial functions inside the body and the skeleton provides support in maintaining the body’s shape and it protects internal
Premium Muscle Muscular system Heart
INTRODUCTION Smooth muscle fibers in different organs are distinctly different from each other in their physical dimensions‚ organization into bundles or sheets‚ response to stimuli‚ characteristics of innovation‚ and function. Smooth muscle is responsible for the contractility of hollow organs‚ such as blood vessels‚ the gastrointestinal tract‚ the bladder and the uterus. Specifically in the uterus‚ regulation of smooth muscle contraction is under the influence of an octapeptide known
Premium Childbirth Uterus
REVIEW SHEET EXERCISE 2 Skeletal Muscle Physiology NAME: LAB TIME/DATE:9pm.. 4.8.11 Electrical Stimulation 1. Name each phase of a typical muscle twitch‚ and‚ on the following line‚ describe what is happening in each phase. a. Latent-stage from rest to muscle tension begins b. Contraction-At this stage the muscle reaches its peak in contraction c. Relaxation- muscle is shortened‚ returns to zero and back initial length. 2. In Activity 2‚ how long was the latent period? ___2
Premium Muscular system Muscle contraction Skeletal muscle
smooth muscle. In cardiac muscle‚ each heartbeat is triggered by the hearts own pacemaker cells‚ which initiate electrical discharge and when this reaches the contractile muscle cells (the cardiomyocytes)‚ they create an action potential which increases the concentration of calcium ions into the cell. Calcium ions play a key role in activating what is known as the contractile machinery – the actin and myosin filaments. The cardiac action potential‚ unlike other forms of muscular contraction‚ will
Premium Heart Muscle Cardiac muscle
patient is admitted for electroconvulsive treatment (ECT). The physician orders the neuromuscular blocking agent metocurine iodide (metubine) to reduce trauma by relaxing skeletal muscles. Explain the process of muscle contraction and how a neuromuscular blocking agent‚ such as metubine‚ would interfere with muscle contraction. According to the Mayo Clinic website electroconvulsive treatment is the use of an electrical signal that sent through the brain to intentionally induce a brief seizure. They
Premium Action potential Acetylcholine Neuromuscular junction
EXERCISE 2: Skeletal Muscle Physiology Student Name: ___________________________ Student ID#: _____________________ Student instructions: Follow the step-by-step instructions for this exercise found in your lab manual and record your answers in the spaces below. Submit this completed document by the assignment due date found in the Syllabus. Rename this document to include your first and last name prior to submitting‚ e.g. Exercise2_JohnSmith.doc. Please make sure that your answers
Premium Skeletal muscle Muscular system Myosin
of spontaneous contractions and the response to stimulating the nerves at 20 Hz with both a voltage that produced only a modest response and the voltage that produced the maximal response. 1) Briefly describe the response of the ileum when it is unstimulated and during stimulation of the nerves. It is shown that the rabbit ileum has a constant rate of contractions and relaxations‚ when it is not stimulated. However there is a significant drop in the amplitude of the contractions‚ when the ileum
Premium Neurotransmitter Acetylcholine Nervous system
Muscle building quickly is one goal a lot of body builders try to work hard on. As much as they also go for definition‚ shape and symmetry‚ these things are usually secondary for the goal of building muscle mass‚ at least for serious body builders. Most‚ if not all of them‚ adhere to the belief that having muscle mass is what separates a truly spectacular physique from the average person who just wants to flaunt an aesthetically nice and toned body. The first tip that people should take notice
Premium Nutrition Physical exercise Muscle