HLT100 Anatomy and Physiology: A Comprehensive Case Study Analysis

This HLT100 Anatomy and Physiology case study provides a detailed analysis of various body systems and their interactions. It begins by assessing Brodie's body shape and size using BMI and waist-to-height ratio, emphasizing the importance of maintaining a healthy weight and waist circumference to reduce cardiovascular risks. The study then explores cell respiration, differentiating between aerobic and anaerobic respiration, and discusses their roles in ATP production during exercise. Inhalation is explained in terms of the mechanics of air entry, warming, and filtration within the respiratory system. The impact of electrolytes on nerve function, particularly the sodium-potassium pump and the roles of sodium, potassium, and calcium in nerve impulse transmission and muscle contraction are also discussed. Furthermore, the case study examines the effect of exercise on venous return and the implications of respiratory infections on cardiac muscle function and gas exchange. The case study concludes by highlighting the homeostatic functions of the respiratory system in maintaining acid-base balance in the body.

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Anatomy and Physiology
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Case study A
Body shape and size
Weight Index (BMI) characterizes whether a man is overweight or fat by taking a gander at their
weight to height ratio. It is computed by taking a man's weight (in kilograms) and dividing it by
their tallness (in meters squared). Lately, look into has established that midriff to-stature
proportion is a greatly improved indicator of cardiovascular wellbeing hazard and a shorter life
expectancy because of disease than BMI, which is weight to height proportion (Marieb &
Hoehn2007). This are the two methods that will be used to determine the most fitting body shape
and size of Brodie. Though the two methods are not perfect on their own, when used together
they are useful in determining how healthy one’s body is. In Brodie’s case calculating his body
mass index will be obtained by dividing his weight of 95kg with his height in squared meters
(1.85 * 1.85). When we calculate this we get the BMI of Brodie to e 27.7, which makes him
overweight. His ideal body weight should range from 18.5 to 25 BMI which is the BMI range for
a healthy weight (Nelson 2014). This implies that Brodie needs to decrease his body weight.
When calculating waist to height ratio, it is important to keep in mind that waist circumference
should be half the height to obtain a ratio of 0.5. Calculating Brodie’s ratio, we get a margin
difference 0f 0.04 from the ratio considered safe (Pine, Sloan & Jacobs2015). This implies that
the ideal waist circumference for him is around 92.5 cm. Male gender allows up to 94cm waist
circumference for a healthy body. Exceeding the 0.5 ratio can result to an increased risk of
cardiovascular events and in most cases a reduced lifespan. It is important that Brodie checks his
weight in that he should weigh half waist circumference of his height. In order to achieve a
decrease on health risks he needs to ensure that his waist circumference measures at most 94cm
and ensure that his BMI is 25 or below. This can be observed by healthy eating and exercising to
reduce body fat.
Cell respiration
Cell respiration is a procedure where cells make ATP by separating organic amalgams from
nourishment. ATP can be delivered by muscle cells using oxygen, this is known as aerobic
respiration.

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Amid regular and light exercises, ATP is created by mitochondria of muscle filaments in a
procedure called aerobic respiration. Oxygen is a primary requirement for aerobic respiration in
order to separate nourishment vitality to produce energy for muscle constrictions. Aerobic
respiration creates a lot of energy and is a proficient method for making ATP (Scanlon&
Sanders2014). Glucose particle separation can result to up to 38 ATP atoms. This is the favored
technique for ATP generation by body cells. Aerobic respiration requires a lot of oxygen and can
be done over significant lots of time. As action levels increment, breathing rate increments to
supply more oxygen for expanded ATP creation.
Exercise causes muscles to contract quickly thus oxygen can't go to the muscle cells fast enough
to remain mindful of the muscles' prerequisite for ATP. The technique, called anaerobic
glycolysis (at times called anaerobic breath) isolates imperativeness stores without oxygen to
make ATP (Shier, Butler & Lewis 2015).
Anaerobic glycolysis delivers just 2 atoms of ATP for each particle of glucose, so it is a less
effective process than aerobic. Notwithstanding, anaerobic glycolysis produces ATP around two
times quicker than that done by aerobic respiration. At the point when a lot of ATP are required
for brief times of enthusiastic movement, glycolysis can give a large portion of the ATP that is
required. Anaerobic glycolysis likewise goes through a lot of glucose to make moderately little
measures of ATP (Puppo 2013). Notwithstanding ATP, glycolysis result to an increased rate of
lactic acid build up. At the point when lactic acid develops quicker than it very well may be
expelled from the muscle, it can prompt muscle weariness. Anaerobic glycolysis can be
completed for just around half a minute to a minute. Some ongoing investigations have
discovered proof that mitochondria inside the muscle filaments can separate lactate to deliver
ATP and that intense exercise results in more lactate being taken up by mitochondria to create
ATP (Ricci 2013).
Inhalation
As a result of negative pressure created around the lungs by the diaphragm during inhalation, the
pressure causes the lungs to inflate and draw in air.The nasal hole allows for entry of air into the
nasal cavity. Air is warmed to body humidity and temperature as it goes through the nasal cavity
by dampness from layers with mucous. Through this procedure equilibrating the air to the body
conditions, decreasing any harm that chilly, dry air can cause is accomplished. Particulate issue

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that is drifting noticeable all around is expelled in the nasal entries by hairs, bodily fluid, and
cilia (Reece & Rowe 2017). Air is additionally synthetically tested by the feeling of smell. From
the nasal hole, air goes through the pharynx and the larynx as it advances toward the trachea. The
fundamental capacity of the trachea is to channel the breathed in air to the lungs and the breathed
out air out from the body. Deficient rings of ligament and smooth muscle are the constitute
makeup of trachea. The ligament gives strength and support to the trachea to keep the section
open. Cells having cilia that discharge mucus line the walls of the trachea. The mucus acts in
response of getting alien particles breathed in allowing the particles to be pushed by cilia to
pharynx.Trachea ends isolates into two bronchi that enter the left and right lung. Air enters the
lungs through main bronchi (Gunstream&Gunstream2010). The essential bronchus partitions,
influencing smaller bronchi until they to end up small enough to form bronchioles which split
further and spread through the lung. Like the trachea, the bronchus and bronchioles are made of
tendon and smooth muscle. Bronchi are innervated by nerves of both the parasympathetic and
thoughtful tactile frameworks that control muscle compression (parasympathetic) or unwinding
in the bronchi and bronchioles, dependent upon the sensory system's signals.Each respiratory end
are jointed with alveolar conduits. Alveoli are situated towards every end alveolar sacs attached
to the conduits. Gaseous exchange happens just in the alveoli (Huang et al 2010.). The alveoli
are in coordinate connection with vessels of the circulatory framework. Such connection
guarantees oxygen diffusion between alveoli and the blood. Oxygen then diffuses into the red
blood cells. The anatomical course of action of vessels and alveoli stresses the auxiliary and
useful relationship of the respiratory and circulatory frameworks.
Electrolytes effects on nerve
For the nerves to function they require an indispensable system referred to as the sodium-
potassium pump. This system basically works by pumping three sodium particles, molecules
containing charge, out of the nerve cell, empowering two potassium particles to enter the cell,
giving the nerve a charge since it has more positive particles outside than inside (Sturkie 2012).
The sodium-potassium pump triggers an electrical drive that ricochets beginning with one nerve
cell then onto the following transmitting messages between your brain and spinal code and
whatever is left of your body. Calcium supplement additionally assumes a primary job in the
transmission of nerve impulses which act by contracting both the body and heart muscles.

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Sodium: This electrolyte in the body is majorly situated in blood and assists in keeping
liquid parity. Nerve and muscle functions additionally depend on sodium. Low levels of sodium,
that comes about because of diminished sodium admission or abundance body water, influence
the sensory system and cerebrum creating side effects including lethargy and perplexity. Quick
falls or to a great degree low sodium level can cause muscle jerks, seizures, trance state and can
eventually result to death (Waugh & Grant 2014). High sodium, which ordinarily results from
parchedness or a diminishing in body water, produces indications like low levels including
perplexity, muscle jerks, seizures and demise.
Potassium: Kidney discharge keeps up tight control of potassium levels in your blood.
Low potassium, which can be caused by retching, looseness of the bowels and diuretic utilize,
can deliver shortcoming, muscle jerks and irregular heart rhythms (Martini, Nath &
Bartholomew 2005). Be that as it may, low potassium once in a while causes critical issues.
Conversely, high potassium can deliver considerably more noteworthy impacts. Kidney failure
largely attributes to high potassium and can cause genuine and dangerous cardiovascular
arrhythmias.
Calcium: It assumes an imperative job in your bone development and turnover and in
typical cardiovascular capacity. releasing of calcium from or deposition into the bone can be
done to tightly regulate the amount in blood.Calcium channels contained in nerve cells allows
activation of proteins that trigger impulses leading to muscle contraction by flowing into the cells
(Brown 2012). Low levels of this mineral cause shortcoming, shivering in the feet and hands and
disarray. High calcium levels can be the consequence of endocrine issue and different diseases.
While little increments in calcium levels can be all around endured, abnormal states can cause
lack of hydration because of expanded water filtration by the kidney. Extra impacts incorporate
queasiness, blockage, stomach agony and obstruction.
Exercise on Venous Return
Venous return (VR) is the stream of blood back to the heart. Under consistent state conditions, it
must be equivalent to heart yield when averaged over time in light of the fact that the
cardiovascular framework is basically a shut circle. otherwise, blood would aggregate in either
the foundational or pneumonic disseminations. Albeit cardiovascular yield and venous return are
related, each can be freely directed (Rizzo 2015). Heart being made up of muscles and a regular

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exercise helps in keeping the hurt muscles healthy. Regularly exercising improves venous return
in the case that blood volume is increased, increasing end diastolic volume and increasing
strength of heart muscle through increasing their size and contractile strength. Through exercise
one is able to increase the number of capillaries at muscles where exchange of gases occurs thus
reducing peripheral resistance.
Brodie’s blood pressure can affect his venous return in that the pressure of heart resting between
heartbeats has exceeded the normal blood pressure of 120/80mmHg. This implies that the
systolic pressure and diastolic pressure are way off the normal pressure. Amid practice the pulse
in the veins isn't sufficiently high to build the level of venous return thus keep up the higher
stroke volume and cardiovascular yield which practice requires.
Respiratory Infection (cold)
Upper respiratory infection results to a reduced cardiac muscle function. It can also impair the
respiratory muscles thus affecting oxidation in the body. A decrease in cardiac muscle strength
implies that intake of oxygen will be reduced and as such a need for fast oxygenated blood
supply to the body, thus an increase in heartbeat (Brown 2010). This increase in heartbeat
implies that there will be a resultant pressure increase to the heart.
One of the primary homeostatic elements of the respiratory framework is the gas exchange that
happens in the alveoli in the lungs. As blood goes through the little vessels in the alveolar sacs,
changing weight angles enable oxygen and carbon dioxide to diffuse all through the blood.
Gas exchange in the lungs likewise keeps up corrosive base parity in the body. In the event that
the pH of the blood turns out to be excessively acidic, the breathing rate increments (Coad &
Dunstall 2011). This decreases the measure of carbon dioxide in the blood so the pH increments
toward typical. Blood that is excessively soluble will trigger easing back of the breathing to build
the measure of carbon dioxide (and in this way, carbonic corrosive) and lower the ph.
Ventilation, or breathing, is controlled by the sympathetic and parasympathetic bits of the
autonomic sensory system. The thoughtful sensory system causes bronchodilation like what
occurs amid work out. On the other hand, parasympathetic incitement results in
bronchoconstriction. Coughing and sniffling are likewise under the control of the autonomic
sensory system. The body can also dissipate excess heat through exhalation to maintain

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homeostasis air entering the lung is warmed by body heat and exhaled. Antibodies like IgA and
cytokines are secreted to destroy invading virus.
Coronary Artery Disease
This involves a condition where arteries supplying blood to the heart are impaired and reduces
blood flow to the heart. This results to the heart not being able to perform its job as well as it
should. If Brodie was to develop this disease it would mean that oxygen supply to the heart
muscles will be greatly reduced basing on the fact that blood is the main source of oxygen supply
(Denbow 2015). This will result to a reduced heart rate that may result to conditions like heart
attacks. It can also lead to abnormal heartbeat since an increase in heart beat rate will be required
in order to offset the effect of reduced blood flow to the heart. Resultant supply of blood without
oxygen in the body will result to build up of lactic acid due to anaerobic respiration, since a lot of
muscle cells will require energy provision and with minimal oxygen supply in play, aerobic
respiration will not be possible. Anaerobic respiration occurs without provision of oxygen but it
results to build up of lactic acid which causes exhaustion of body muscles (DelMonte & Kim
2011). Aerobic respiration will only occur in presence of oxygen, and with reduced blood flow to
the heart muscle cells, the body will react by increasing heart rate to acquire oxygen. Long time
inadequate supply of oxygenated blood to the heart can cause severe damage to the tissues that
are not receiving blood. Buildup of lactic acid due to anaerobic respiration in many cases leads to
heart attacks. The heart being an organ that beats continuously and does not rest needs supply of
oxygen rich blood which is supplied by the coronary arteries. Reduced supply of blood means a
reduce oxygen supply, and thus heart muscle cells working anaerobically to produce energy
building up an oxygen debt which require for an organ to rest to recover but the heart is unable to
do this.

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