BIOS 251 Week 1: Master Homeostatic Control – Download now and secure that A+!
Learning Objectives:
OL Lab 1: Homeostatic Control
How does the human body keep itself in balance?
• List some of the main physiological variables under homeostatic control
• Employ appropriat...
OL Lab 1: Homeostatic Control
How does the human body keep itself in balance?
Learning Objectives:
List some of the main physiological variables under homeostatic control
Employ appropriate vocabulary to discuss the processes and concepts of homeostasis
Explain the steps in a homeostatic pathway from stimulus to response
Compare different types of feedback loops
Identify signs of homeostatic disruption and determine the underlying mechanism
Introduction:
The human body is a very complex combination of finely-tuned machinery. Every organ system
is dependent on the other to carry out its physiological functions along with maintaining an
internal equilibrium. Homeostasis is the ability of the body to maintain an internal balance to in
the body. So how does it always keep everything in balance? In this simulation, you will learn
about the underlying regulatory workflow involved in the homeostatic process, through the
examples of body temperature, blood pressure, and blood sugar regulation.
Observe homeostasis in action
You will test different settings on our virtual volunteer, Phineas. You will observe and analyze
how the body reacts to the various stimuli such as changes in temperature, heart rate, and blood
glucose levels in the body. Using a 3D model of the human body, you will be able to apply one
or more stimuli on the test subject, to observe an immediate visible impact on physiological
variables.
From your observations, you will identify the sensors detecting the stimuli, the control center
processing them, and the effectors acting to counter them on Phineas’ body.
Finally, you will interpret the resulting changes in those variables to explain the homeostatic
phenomenon.
Part 1: Complete Labster Homeostatic Control
This study source was downloaded by 100000883055406 from CourseHero.com on 09-25-2024 13:43:37 GMT -05:00
Part 2: Report and Reflection
Purpose: Describe in your own words and in complete sentences, the purpose of this
experiment.
The purpose of the lab is to define homeostasis and how it is maintaining balance in the body.
Some examples include blood pressure, blood sugar, and body temperature to support the main
idea of homeostasis. Overall, there are many different kinds of regulatory pathways that work
together to maintain homeostasis in the body and ensure that the body works in its optimal best.
Observations: List 2 observations you have made in this simulation.
1. If one of the system's equilibrium is thrown off and not returned to the normal range, the
feedback loop will be a positive feedback loop. The positive feedback loop is represented
as a loop where more of a specific action will continue until it is no longer needed.
2. Positive Feedback rarely occurs in the body since the body has many processes that
require negative feedback loops.
Questions
1. Why is it essential to have maintained homeostasis? (1 point)
a. Homeostasis is defined as equilibrium of opposing states ensuring a balance of
both states. It is essential to the body because the body can only function in
certain environment physically and internally. For instance, the body can only
function in body temperature 37 degree Celsius and if the surrounding and/or
internal temperature changes and cannot return to that temperature, the body
would be thrown off the balance and one by one systems would shut down.
2. Provide an example of positive feedback mechanism and identify the stimuli, the central
processing unit and the effectors involved in the pathway. (2 points)
a. One example is Blood Clotting. When there is a CUT (Stimuli), the nerve
contracts (sensor) to alert Platelets (Effectors) to rush to the site, and when more
platelets are needed, it releases chemicals to glycoprotein receptors (control
center) to activate more platelets. It will stop production when the receptors stop
receiving the chemical signals for more platelets.
3. In the simulation, what were the organs involved in homeostatic control? (2 points)
This study source was downloaded by 100000883055406 from CourseHero.com on 09-25-2024 13:43:37 GMT -05:00
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