Lab.1: Practical Human Physiology

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Zhikal O. Khudhur/Assist lecturerOmer Sardar/ Research assistant_____________________________________________Human physiology– 2nd Stage /1st Semester

[email protected]

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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