Homeostasis Flashcards
means maintaining a relatively constant state of the body’s internal environment
Homeostasis
The term used to
describe a pattern of response to restore the body to normal stable level is termed
Negative feedback
When a
stimulus (environment change) is met by a response that reverses (negates) the trend of the stimulus, it is
Negative feedback
What is the average resting pulse rate for adults
60 to 90 bpm
What happens to your pulse rate with vigorous exercise?
Increases
Demand for oxygen also increases as the body requires more energy to fuel the muscles involved. In order for these oxygen-rich blood to be circulated and arrive to the
muscles, the pulse rate increases. This results in the muscles having the optimal function to perform vigorous
activity.
Every cell in the body requires oxygen for respiration so that sufficient energy can be produced. Carbon
dioxide, a waste product, is also produced and needs to be removed. Therefore, the levels of both gases must
be regulated. How does this explain the changes in your pulse rate?
During an activity, the body requires sufficient amount of oxygen to fuel the muscles and as these oxygen
molecules are used up, carbon dioxide is released as a waste product. The pulse rate increases in order to supply this demand of the body as a result of increased pumping of blood by the heart. Since the body does not necessitate these excess carbon dioxides in the process, they are expelled in the process of exhalation. In
summary, the changes in pulse rate that happen in relation to the intensity of activity help in regulation of oxygen and carbon dioxide levels for efficient cellular respiration.
How did your body respond during the resting period after each activity?
Breathing rate slows as the body’s oxygen demand decreases, yet sweating continues to dissipate excess heat while the body temperature gradually returns to normal. Sweating also leads
to fluid loss, which disrupts the body’s fluid and electrolyte balance, thus thirst sensation or rehydration was felt. The member’s heart rate also gradually returns to pre-exercise levels as the body recovers, helping to restore cardiovascular function and efficiency.
Explain why your body responded this way during the resting period after each activity?
The body needs to adapt and recover during the resting phase to regulate the physiological demands placed upon it during an exercise.
Increased fluid intake
aids in the replenishment of lost fluids and electrolytes.
Normal breathing rates are resumed, facilitating effective carbon dioxide elimination and oxygen intake. This then promotes cellular respiration and preserves homeostasis by assisting in the rebalancing of oxygen and carbon dioxide levels. Therefore, the body’s reaction during the resting phase is closely related to reestablishing homeostasis in temperature, fluid and electrolyte
balance, energy, gas exchange, pH, and hormone control.
How do you think the results from this lab would compare for a trained athlete and an average person?
Explain.
A trained athlete handles things like heart rate, body temperature, and blood pressure better during exercise than an average person. Athletes might recover quicker after exercising too. These differences happen because athletes train their bodies to work more efficiently.
What are some ways your body regulates the increase of body temperature that also occurs when exercising?
Heat is released on the skin’s surface by increased blood circulation, which also contributes to heat dissipation
through evaporation during sweating. Quicker breathing allows for better cooling through exhaled air. Hormonal changes regulate vital functions such as perspiration production and blood flow. Furthermore, behavioral reactions such as searching for colder surroundings aid in controlling body temperature.
Explain what happened to your respiratory rate (breaths per minute) during exercise
Rises during exercise because of the body’s natural reaction of requiring more oxygen to power the muscles. This is so because physical activity uses more energy than rest does, and in order for muscles to create energy, they need extra oxygen. Moreover, to take in more oxygen and get it to the muscles, the body speeds up breathing. The respiratory rate can often rise from its normal resting rate of 12–20 breaths per
minute to 30–40 breaths per minute, or even more, depending on the intensity of the exercise.
Explain what happened to your respiratory rate during the resting period after exercise
Progressively drops after activity as the body requires less oxygen, returning to a state of equilibrium.
Less oxygen is needed to make energy when the body’s metabolic rate slows down and the
muscles go back to their resting condition.
The respiratory rate therefore gradually recovers to its typical resting rate, which is between 12 and 20 breaths per minute.
After exercise, the body may also continue to breathe deeply
for a few minutes in order to assist the body return to a relaxed condition and expelling extra carbon dioxide.
Was homeostasis achieved? How do you know?
After exercise, physiological indicators gradually revert to resting values, indicating the achievement of
homeostasis. The respiration rate in this case steadily drops, demonstrating the body’s attempt to regain
homeostasis. The body’s capacity to maintain internal balance is also demonstrated by the stabilization of other key indicators including body temperature and heart rate. These reactions imply the presence of a functional homeostatic system.
