Physiology Final Exam

1. Which of the following endocrine organs located in the brain?

Hypothalamus

Gonads

Thyroid gland

Pancreas

2. Which of the following is not a function of the respiratory system ?

Enhances venous system

Detoxifies fats

Enables speech, singing, and the vocalizations.

Provides a route for water loss and heat elimination.

3. The functional unit of the lungs is :-

Trachea

Bronchi

Alveoli

Bronchus

4. Most O2 transport in blood happens by:-

Oxyhemoglobin

Plasma

Carbaminohemoglobin

Bicarbonate ions

5. Which of the following is an effect of Cortisol

Stimulates glucogenesis

Stimulates protein degradation

Stimulates lypolysis

All of the above

6. The P wave in an electrodiagram correspondes to:

Ventricular depolarization

Atrial depolarization

Atrial repolarization

Ventricular repolarization

7. Which of the following is the correct passage of inhaled air ?

Pharynx—larynx—trachea

Larynx — pharynx— trachea

Bronchioles—bronchi—alveoli

Bronchi—bronchioles—trachea

8. Aldosteron's target tissues are :

Proximal tubule

Loope of henle

Distal tubule

Distale and collecting tubules

9. Total peripheral resistance stands for :

Venulse

Arteries

Veins

Arterioles

10. Which one of the following makes up T4

Tyrosine + 3 iodine atoms

Tyrosine onlt

Tyrosine +2 iodine atoms

Tyrosine +4 iodine atoms

11. Which of the following is a heart rate influencing factor :

Preload

After load

Parasympathetic stim

Contactility

12. Which of the following stimulate the anterior pituitary to release ACTH?

CHRH

GNRH

CRH

Dopamine

13. Boyle's law states:-

Pressure and volume are directly proportional

Pressure and volume are inversely proportional

Pressure and area are directly proportional

Volume and area are inversely proportional

14. Factors that increase aldosterone secretion are

Increase K+ in the blood

Renin angrotensin system (RAS)

Increase Na+ in the blood

A+B

15. The only way to spread the action potential from the atria to the ventricles is by:

Fibrous tissue

Gap junctions

SA node

AV node

16. Which of the following is not correct?

T4 is more active than T3

Moat of the thyroid hormones are T4

T3 and T4 are generated from follicular cells

Could also be called as thyroxine

17. Which of the following matches incorrectly :

Ventricular diastole - - - >80 mmHg

Systolic blood pressure - - - >120 mmHg

Ventricular systole----> 120 mmHg

Diastolic blood pressure ---->80 mmHg

18. All of the following about surfactants are true except for:-

Made by Type II alveolar cells

Mixture of lipids and proteins

Increases surface tension

Contributes to lung stability

19. Autorythamic cells have:

Unstable resting potential

Stable resting potentials at - 70mv

Stable resting potentials at - 90 mv

None of the above

20. Mean atrial pressure (MAP) equals to:

Diastole pressures +1/3 (Diastole - systole)

Systole pressure +1/3(diastole - systole)

Diastolic pressure +1/3(pulse pressure)

Systolic pressure +1/3(pulse pressure)

21. Vital capacity can be used to measure:-

Expiratory capacity

Inspiratory capacity

Functional residual capacity

Lung capacity

22. Which one of the following matches correctly?

GH-soft tissues >>increase in strength and length

GH-soft tissues>>hyperplasia , hypertrophy

GH-skeleton>> increase in thickness before puberty

GH-skeleton >>increase in in length after puberty

23. The largest pure indocrine gland:

Pancreas

Thyroid gland

Pituitary gland

Adrenal gland

24. The difference between the end- expiratory volume and the end- inspiratory volume is known as:-

Residual volume

Tidal volume

Total lung capacity

Inspiratory reserve volume

25. Heart rate is determined by:

The rate of repolarization in autorythamic cells

The rate of depolarization in autorythamic cells

The rate of depolarization in contractile cells

The rate of repolarization in contractile cells

26. The difference between the intra-alveolar pressure and the intrapleural pressure is:-

Atmospheric pressure

Transmular pressure

Intra-alveolar pressure

Positive pressure

27. The most important member in the mineral corticoid family is :

Cortisol

Adrenal androgens

Aldosterone

None of the above

28. The lub sounds of the heart is caused by:

Ventricular diastole

Closure of the AV

Ventricular systole

B+C

29. Which of the following is not an effect of the parasympathetic simulation

Decreases rate of the depolarization threshold

Decrease heart rate

Decrease AV nodal delay

Decreases excitability