lab.1: practical human physiology
TRANSCRIPT
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Zhikal O. Khudhur/Assist lecturerOmer Sardar/ Research assistant_____________________________________________Human physiology– 2nd Stage /1st Semester
TIU - Faculty of ScienceMedical Analysis Department
Lab.1: Practical Human Physiology
https://tiu.edu.iq/
2021 - 2022
Lab Safety Rules
1-Wear protective clothing .
Lab Safety Rules
-Avoid touching objects (e.g., pencils, cell phones,door handles) while wearing gloves.
3-Pencils, labels, or any other materials should never be
placed in your mouth.
Lab Safety Rules
4-Long hair must be tied back or covered to minimizefire hazard or contamination of experiments.
Lab Safety Rules
5- Do not eat food or drink water in the lab.
do not use lab glassware as food or water containers.
Lab Safety Rules
6- Protect your hands safety:
- wash hands after every lab.
- Handle glassware, sharp tools and heated containers carefully.
Lab Safety Rules
7- electrical safety:
- unplug electrical equipment after use.
- keep all electrical cords and wires away from water .
Lab Safety Rules
8- Chemical safety:
-never touch, taste or smell a chemical unless instructed
so.
- never mix chemicals unless instructed to do so.
-keep lids on chemical containers when not in use.
to do
Lab Safety Rules
9- Do not engage in practical jokes or horseplay in thelab.
Lab Safety Rules
10-Keep nonessential books and clothing far away fromyour work area.
Lab Safety Rules
11-Wipe the bench tops down with disinfectant both before youbegin your work and after you have completed your work.
Lab Safety Rules
12- Dispose of waste products according to instructions.
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Homeostasis
l
is the ability to maintain a relatively stable internal state that persists despite
changes in the world outside. All living organisms, from plants to puppies to
people, must regulate their internal environment to process energy and ultimately
survive.
1. Blood pressure
2. Blood glucose
3. Heart rate4. Body temperature
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Example 1:Negative homeostatic feedback mechanism (loop) involving the brain.
Temperature regulation
Stimulus
Sensor
Integrator
Effector
Response
Result
Increase in body temperature
thermoreceptors in the skin & hypothalamus
Hypothalamus
Skin blood vessels and sweat glands
Blood vessels in skin vasodilate release heat from surfaceSweat glands in skin release heat as sweat
Decrease in body temperature
Body Temperature Homeostasis
RESTING PULSE RATE:NEGATIVE FEEDBACK CONTROL AND NORMAL RANGE-----------------------------------------------------------------------------
-The cardiac rate (or pulse rate) is largely determined by theantagonistic effects of two different nerves.
1-(a sympathetic nerve) stimulates an increase in cardiac rate.
2-And (a parasympathetic nerve) produces inhibitory effects thatslow the cardiac rate.
the resting pulse rate is not absolutely constant. but instead variesabout a set-point value.
- Exercise will demonstrate that your pulse rate is ina state of dynamic constancy (implying negativefeedback controls).
-From the data you can determine your own pulse-rate set point as the average value of themeasurements.
Homeostasis Experiment
This experiment is about doing exercise in order to disrupt body homeostasis and then we will detect whether the body returns to initial condition or not.
For this experiment we have 3 parameters
1- Temperature
2- Pulse Rate
3- Blood Pressure
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Procedure:1- we will take the initial temperature, Pulse Rate and Blood Pressure.
2- We will ask the students to run for few minutes
3- After running, we immediately take the Temperature, Pulse Rate, Blood Pressure.
4- finally we will let the student to rest for 20min and the take the Temperature, Pulse Rate, Blood Pressure again.
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Note: We will need these devices to measure the parameters:
1- Temperature: Thermometer 3- Blood Pressure: Sphygmomanometer
2- Pulse Rate: Pulse Oximeter
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Name Gender
Temperature (Co) Pulse Rate (bpm) Blood Pressure(mmHg
InitialAfter
ExerciseInitial After Exercise
Recovery
Period
After 20 min
Initial After Exercise
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