Skeletal Muscle Lab Report

The more stimuli per second, the greater the force generated by the muscle due to a

We have a series of reflexes throughout the body that support us and naturally co-ordinate our movements, yet we interfere with these

The mole is a convenient unit for analyzing chemical reactions. Avogadro’s number is equal to the mole. The mass of a mole of any compound or element is the mass in grams that corresponds to the molecular formula, also known as the atomic mass. In this experiment, you will observe the reaction of iron nails with a solution of copper (II) chloride and determine the number of moles involved in the reaction. You will determine the number of moles of copper produced in the reaction of iron and copper (II) chloride, determine the number of moles of iron used up in the reaction of iron and copper (II) chloride, determine the ratio of moles of iron to moles of copper, and determine the number of atoms and formula units involved in

Biceps Brachii - It's attachments are the coracoid process, supraglenoid tuberosity, and radial tuberosity. When it contracts it causes flexion and supination. It's located close to the endangerment site the antecubital. This area is known for housing chronic pain.

The Jewish people in Europe faced harsh persecution in the late 19th and early 20th century. This hatred towards the Jewish people was often exhibited through violence and false accusations that led to unreasonable and unfair punishment. Such actions prompted Jewish leaders from all around the world to start a Zionist movement calling for the creation of a Jewish state. Theodor Herzl and Max Nordau were leading proponents of political Zionism, a branch of Zionism that focused on change through political channels. Although Nordau and Herzl were both political Zionists, they disagreed on how to establish a Jewish state. Nordau’s ‘Jewry of Muscle” uses imagery, symbolism, and repetition of themes to focus on the Jews glorious past defined by the

Body composition testing determines how much of your body is and isn't fat. The non-fat part of your body is called lean tissue, which includes your muscle, water, bone and organs. Lean tissue is known as metabolically active tissue, which is consistently burning calories all day. The more lean tissue you have, the higher your resting metabolic rate will be. Body fat is a storage form of energy and therefore has a very low calorie demand. A DEXA Scan is one mechanism to determine fat and lean tissue. It is very accurate and repeatable, however it can be extremely costly and difficult to find. This process involves the subject lying on a table fully clothed and a small dose of radiation that passes through the body allowing X-rays to distinguish fat from

The purpose of this experiment was to study the anatomy of human reflexes, specifically to compare monosynaptic reflexes to polysynaptic reflexes. The monosynaptic reflex in this experiment is the myotactic, or Hoffman, reflex that will be seen by simulating the tibial nerve and the polysynaptic reflex is the vestibulo-ocular reflex that will be seen by spinning the subject in a spin chair.

The introduction of this lab report discussed and elaborated how muscle contraction is an intricate and precise step-by-step process in the body. The concepts outlined at the introduction intertwine with the experiments performed in this lab. The experiments aimed to showcase the physiological cause and effect of skeletal muscle responses towards various situations. For instance, the first experiment demonstrated spatial summation through the form of muscle recruitment. The cause of this reaction was due to the increased voltage input on the sciatic nerve. Furthermore, the second case study exhibited temporal summation, where constant stimulus exposure led to a fusion of twitches called a tetanic contraction. As for the third experiment, the

The Power of Push-ups Intro This experiment does not require actual trials as it uses data to solve the research question. Personal Engagement I have recently started to work out and I had wondered if I could use some of my workout exercises and relate them to physics. One exercise I do to build my chest muscle is a pushup.

ions across the membrane of the mitochondria during oxidative phosphorylation. Muscle buffering capacity is also improved. One acute response to hypoxia is hyperventilation; this increased rate of respiration occurs to maintain the alveolar partial pressure of oxygen. Hyperventilation leads to increased removal of carbon dioxide through the lungs and a state of respiratory alkalosis. This state of respiratory alkalosis can lower the pH of the blood and result in additional bicarbonate being excreted by the kidneys. This is the mechanism by which we increase muscle buffering capacity. Something to note about muscle buffering capacity and the lactate threshold is that there is a phenomenon that is called the “lactate paradox.” The lactate paradox

Muscles are responsible for producing movement and maintaining positions in the body. Skeletal muscles, specifically, are formed by one or more muscle fibers that are controlled by a nerve, this is called a motor unit. For muscles to contract, the motor unit must be stimulated, thus allowing the muscle fibers to contract. Through such contraction, our body is able to perform many tasks, whether it is walking, jumping, or simply sitting up. When a muscle contracts, the strength that the motor unit is able to ‘pull’ is known as the summation.

When performing many feats of physical skill, calculating how fast a person can perform the action has become a custom that has gained prominence in recent years. Observing how long it takes a person to perform an action, now known as observing the reaction time, has even gained enough importance to the point that it has even used in some scientific investigations. The purpose of this scientific investigation, for instance, is to test whether or not an outside force, such as music, will affect the reaction time of any given test subject. Whether the change will be a positive one, such as helping

Figures 1 through 5 showed the correlations between body mass index, fitness index and blood pressures. Figure 1 showed a negative correlation between body mass index and fitness. They are inversely related, body mass index can tell you how much fat an individual has, and if an individual has a high fat density then the individual would have a lower fitness index compared to an individual less fat. Examining the data, it supports the BMI and fitness index hypothesis, showing when BMI is higher than the fitness index is lower. Figure 2 and 3 shows a positive correlation between body mass index and both the systolic and diastolic blood pressure.

A tiny microscopic biome located in the gastrointestinal area of overweight individuals has been found to produce more body fat than those that are found in non-overweight individuals (If you are obese, you extract more energy from the food and that extra energy gets stored as fat). This can be linked to Leptin deficiency. The gut-based micro biota has been thoroughly experimented, especially with mice. The experiment consisted of taking the micro biota from both obese and lean individuals, and transplanting them into mice. Even though the mice that contained the obese micro biota ate less, the mice seemed to produce a lot more fat than the lean-based micro biota mice. The result of the growth was also quick as effects on body fat (of the obese

There are two groups of reflexes in the human body, with two ways to categorize each of them. Reflexes can either be inborn and connected through the nervous system, or they can be learned through practice. Another way to explain a reflexive category would be autonomic reflexes or somatic reflexes. Autonomic reflexes are those which are unaware to us and act on visceral organs of the body, whereas somatic reflexes involve skeletal muscle stimulation. Both types of reflexes are put into effect via the nervous system. (1)