bones and tendons acting on each other through muscle contraction and relaxation. (1,3) To understand how a muscle contracts you must first look at the anatomy of skeletal muscles. Anatomy of Skeletal Muscle Figure 1 shows the components of a cross section of muscle. Each muscle belly is made up of thousands to tens of thousands of muscle fibers (cells). The fibers are grouped into bundles of as many as 150 fibers called fasciculi. The bundles have a connective tissue
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between QRS and the start of ventricular contraction(s). 1. Observe the heart and describe its behavior. Is this behavior consistent with what is shown in the data above? Yes. The heart of the frog rhythmically contracts and relaxes. This behavior is supported by the general fluctuations observed force values and the consistent patterns of the ECG occurring in regular intervals. 2. Explain the basis for the delay between the atrial and ventricular contractions. The said delay is mainly caused by
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identifies the weaker muscle groups in a person’s body that could potentially result to injuries. Human muscular contraction can be broken into three styles. Isokinetic contraction consists of movement at a constant velocity. Isotonic, moving a constant load at different velocities. Isometric contraction the production of force when an extremity is static. This lab only uses isometric contractions as it assesses muscular strength or injuries, creates the
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heart will stop. Stop & Think Questions: 1. Watch the contractile activity from the frog heart on the oscilloscope. Enter the number of ventricular contractions per minute (from the heart rate display) in the field below and then click Submit Data to record your answer in the lab report. You answered: 59 beats/min The vagus nerve carries You correctly answered: a. signals that decrease the heart rate. 3. Enter the number of ventricular contractions per minute (from the heart rate display) in the field
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|Contraction of Whole Muscle | |The Nervous System |Ion Channels | | |Membrane Potential | | |The Action Potential
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Biology 115 Semester List of Structures Chapter One Anatomy is the study of body structure and the relationship between structures Physiology is the study of how the structures of the body function Levels of Structural Organization Chemical Cell Tissue Organ Organ system Organism Homeostasis Positive feedback loop Negative feedback loop Relative Positions Superior Inferior Anterior Posterior Medial Lateral Bilateral Ipsilateral Contralateral Proximal Distal
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hollow organs 2. Describe the involvement of connective tissue in a skeletal muscle * Endomysium- surrounds and fills up spaces between individual muscle fibers * Perimysium- ensheaths muscle fascicles (bundles of muscle fibers) * Epimysium- ensheaths the whole muscle 3. Name the components of a skeletal muscle fiber and describe their function * Sarcoplasm- cytoplasm * Sarcolemma- plasma membrane * T-tubules- inward extensions of the sarcolemma * Mitochondria-
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but it isn’t. Not all cells reach the cell surface; the ones that do are either ciliated or secrete mucus. II. Connective Tissue: connects and supports other tissues; 6 major types Characterized by few cells suspended in extracellular matrix of fibers The extracellular matrix might be a liquid, gel or ground solid 1. Loose Connective Tissue: attaches epithelia to underlying
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their delivery stride, (Hulin et al, 2013). A full needs analysis of cricket suggests that elite players need a high aerobic and anaerobic capacity. In addition, there are a number of multi-directional powerful movements and repeated eccentric contractions involved that require a good degree of strength, speed and explosive power for elite performance and injury prevention, (Lee, N. n.d.) This investigation will take into account the demands of fast bowling throughout a county domestic season and
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Tissues: An introduction Lab Report Part 1 This lab is divided into two different parts. Part 1 deals with the general characteristics of tissues, and part 2 asks you to interpret some photomicrographs taken of human tissue slides in our lab. Part one should be completed first, but you’ll probably get a lot of hints about the answers for part 2 if you’ve looked over the images and questions provided ahead of time to work on them. To do Part 1, download the following documents and have your
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