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Henry's law explains the occurrence of ? [ Training professional ]

Question 114-1 : Decompression sickness diffusion hyperventilation hypoxia

.henry's law states that the amount of gas disolved in a liquid is proportional to the pressure of that gas above the liquid as atmospheric pressure decreases in the climb gases which have been held in solution in body tissue come out of solution and form small bubbles causing the bends and other forms of decompression sickness exemple 214 Decompression sickness.Decompression sickness.

Our body takes its energy from .1 minerals.2 protein.3 carbonhydrates.4 vitamins ?

Question 114-2 : 2 3 1 2 3 4 1 4 1 3

exemple 218 2, 3.2, 3.

What is meant by metabolism ?

Question 114-3 : The generation and utilisation of energy by the body's cells and tissues information exchange transfer of chemical messages exchange of substances between the lung and the blood

exemple 222 The generation and utilisation of energy by the body's cells and tissues.The generation and utilisation of energy by the body's cells and tissues.

One of the waste products of the metabolic process in the cell is ?

Question 114-4 : Carbon dioxide protein sugar fat

exemple 226 Carbon dioxide.Carbon dioxide.

The body loses water via .1 the skin and the lungs.2 the kidneys.which of the ?

Question 114-5 : 1 and 2 are correct 1 is correct and 2 is not correct 1 is not correct and 2 is correct both are false

.the body loses water primarily by excreting it in urine from the kidneys also through the lungs as water vapor and through the skin as perspiration sweating exemple 230 1 and 2 are correct.1 and 2 are correct.

Under normal circumstances which gas will diffuse from the blood to the alveoli ?

Question 114-6 : Carbon dioxide carbon monoxide nitrogen oxygen

exemple 234 Carbon dioxide.Carbon dioxide.

The thin walls of capillaries are permeable for ?

Question 114-7 : Gases platelets protein red blood cells

.capillaries are the smallest blood vessels they form connections between the smallest arterioles and the smallest venules capillaries are essentially extensions of the inner linings of these larger vessels in their walls consists of endothelium a single layer of squamous epithelial cells these thin walls form the semipermeable membranes through which substances in the blood are exchanged for substances in the tissue fluid surrounding body cells . /com en/com040 433a jpg.the pores in capillary walls are thin slits that occur where two adjacent endothelial cells overlap the sizes of such openings and consequently the permeability of the capillary walls vary from tissue to tissue for example the capillaries in muscle tissues are less permeable than those of the liver spleen or bone marrow .the density of the capillaries within the tissue varies directly with the tissues' rates of metabolism thus muscle and nerve tissues which utilize relatively large quantities of oxygen and nutrients are richly supplied with capillaries while tissues of cartilage the epidermis and the cornea whose metabolic rates are very slow lack capillaries . /com en/com040 433b jpg.the patterns of capillary arrangement also differ in various body part for example some capillaries pass directly from arterioles to venule but others lead to highly branched networks such arrangements make it possible for the blood to follow different pathways through a tissue and to meet the varying demands of its cells during periods of exercise for example the blood can be directed into the capillary networks of the skeletal muscles where the cells are experiencing an increasing need for oxygen and nutrients at the same time the blood can bypass some of the capillary nets in the tissues of the digestive tract where the demand for blood is less critical .the distribution of blood in the various capillary pathways is regulated mainly by the smooth muscles that encircle the capillary entrances these muscles form precapillary sphincters which may close a capillary by contracting or open it by relaxing how precapillary sphincters are controlled is not clear but they seem to respond to the demands of the cells supplied by their individual capillaries when the cells are low in concentration of oxygen and nutrients the sphincter relaxes when the cellular needs are met the sphincter may contract again exemple 238 Gases.Gases.

The circulatory system amongst other things allows for .1 transportation of ?

Question 114-8 : 1 and 2 are correct 1 is correct and 2 is false 1 is false and 2 is correct both are false

Someone who has anaemia has ?

Question 114-9 : Not enough functional haemoglobin not enough platelets not enough plasma not enough white blood cells

exemple 246 Not enough functional haemoglobin.Not enough functional haemoglobin.

The heart muscle is supplied with blood by ?

Question 114-10 : The coronary arteries the auricles ventricles the pulmonary veins

exemple 250 The coronary arteries.The coronary arteries.

The normal arterial blood pressure of a healthy adult at rest is ?

Question 114-11 : 120/80 mm hg 80/20 mm hg 180/120 mm hg 220/180 mm hg

exemple 254 120/80 mm hg.120/80 mm hg.

Which of the following statements is correct .the blood pressure which is ?

Question 114-12 : In the artery of the upper arm representing the pressure at heart level in the muscles of the upper arm in the veins of the upper arm in all the blood vessels of the body representing the pressure in the whole body

exemple 258 In the artery of the upper arm (representing the pressure at heart level).In the artery of the upper arm (representing the pressure at heart level).

Blood pressure depends on .1 the cardiac output.2 the resistance of the ?

Question 114-13 : 1 and 2 are correct 1 is correct 2 is false 1 is false 2 is correct 1 and 2 are both false

exemple 262 1 and 2 are correct.1 and 2 are correct.

The blood pressure depends on .1 the work of the heart.2 the peripheral ?

Question 114-14 : 1 2 3 and 4 are correct 1 2 and 3 are correct 4 is false 1 3 and 4 are correct 2 is false 2 3 and 4 are correct 1 is false

exemple 266 1, 2, 3 and 4 are correct.1, 2, 3 and 4 are correct.

Changes in blood pressure are measured by ?

Question 114-15 : Pressoreceptors arteriols adrenal glands pacemakers

exemple 270 Pressoreceptors.Pressoreceptors.

The pressoreceptors are located in ?

Question 114-16 : The carotid and aortic arterial vessels the intestines the heart the lungs

exemple 274 The carotid and aortic arterial vessels.The carotid and aortic arterial vessels.

When the pressoreceptors detect a lowering of the blood pressure there are ?

Question 114-17 : 2 3 and 4 are correct 1 is false 1 3 and 4 are correct 2 is false 1 2 and 4 are correct 3 is false 1 2 and 3 are correct 4 is false

.the 'adaptation mechanisms' are the means by which the body counteracts the lowering of the blood pressure ie attempts to raise the blood presure exemple 278 2, 3 and 4 are correct, 1 is false.2, 3 and 4 are correct, 1 is false.

The physiological effects of accelerations to the human body depend on .1 the ?

Question 114-18 : 1 2 3 and 4 are correct 1 2 3 are correct 4 is false 2 3 and 4 are correct 1 is false 1 and 4 are correct 3 is false

.all four will influence the effect of g forces if high g forces are applied rapidly enough for a period of around five seconds or more then loss of consciousness can occur without any of the visual warning signs of low level tunnel vision or black out exemple 282 1, 2, 3 and 4 are correct.1, 2, 3 and 4 are correct.

Positive g will cause the blood flow to the brain to ?

Question 114-19 : Decrease remain constant increase first increase then decrease

exemple 286 Decrease.Decrease.

During sustained positive g forces the order of symptoms you can expect is ?

Question 114-20 : Grey out tunnel vision black out and unconsciousness unconsciousness black out tunnel vision and grey out black out grey out tunnel vision and unconsciousness grey out unconsciousness black out and tunnel vision

exemple 290 Grey-out, tunnel vision, black-out and unconsciousness.Grey-out, tunnel vision, black-out and unconsciousness.

The normal rate of breathing of an adult at rest is about ?

Question 114-21 : 16 cycles per minute 4 cycles per minute 32 cycles per minute 72 cycles per minute

.respiratory rate breathing rate or respiratory frequency the number of breaths a person takes during one minute it is usually measured at rest while sitting .medical textbooks suggest that normal respiratory rate for adults is only 12 breaths per minute at rest most adults breathe much faster about 15 20 breaths per minute .if you forget in the exam then time your breathing and count exemple 294 16 cycles per minute.16 cycles per minute.

The volume of air exchanged during a normal breathing cycle tidal volume is ?

Question 114-22 : 500 ml of air 350 ml of air 150 ml of air 75 ml of air

.resting tidal volume volume of air going in and out of the lungs during normal respiration about 0 5 litres at rest exemple 298 500 ml of air.500 ml of air.

When exhaling the expired air contains ?

Question 114-23 : More carbon dioxide than the inspired air more nitrogen than the inhaled air less water vapour than the inhaled air more oxygen than the inhaled air

exemple 302 More carbon dioxide than the inspired air.More carbon dioxide than the inspired air.

The transfer of carbon dioxide from the blood to the alveoli can be described by ?

Question 114-24 : The law of diffusion boyle's law dalton's law henry's law

.fick's law gas diffusion law gas will diffuse from areas of high concentration to areas of low concentration exemple 306 The law of diffusion.The law of diffusion.

Hyperventilation is ?

Question 114-25 : An increased lung ventilation a too high percentage of nitrogen in the blood a decreased lung ventilation a too high percentage of oxygen in the blood

exemple 310 An increased lung ventilation.An increased lung ventilation.

If somebody starts breathing faster and deeper without physiological need ?

Question 114-26 : The blood turns more alkaline the blood pressure in the brain will rise significantly the blood turns more acid the acid base balance of the blood will not change

exemple 314 The blood turns more alkaline.The blood turns more alkaline.

When hyperventilating you should ?

Question 114-27 : Control your rate and depth of breathing descend apply the valsalva method use the oxygen mask

exemple 318 Control your rate and depth of breathing.Control your rate and depth of breathing.

A pilot can overcome hyperventilation by ?

Question 114-28 : Controlling the rate and depth of breathing and/or breathing into a bag depending on instruments increasing the rate and depth of breathing to eliminate harmful carbon dioxide the use of drugs stabilizing blood pressure

exemple 322 Controlling the rate and depth of breathing and/or breathing into a bag.Controlling the rate and depth of breathing and/or breathing into a bag.

You can overcome hyperventilation by breathing into a plastic or paper bag the ?

Question 114-29 : To raise the level of co2 in the blood as fast as possible to prevent you from exhaling too much oxygen to increase the amount of nitrogen in the lungs to reduce blood pressure

exemple 326 To raise the level of co2 in the blood as fast as possible.To raise the level of co2 in the blood as fast as possible.

Raising the sensory threshold of a sensory organ means ?

Question 114-30 : A lesser sensitivity a greater sensitivity a greater selectivity a lesser selectivity

.if a sensory threshold increases sensitivity decreases raising the perceptual threshold of a sensory organ means lesser sensitivity exemple 330 A lesser sensitivity.A lesser sensitivity.

Subcutaneous pressure receptors are stimulated by ?

Question 114-31 : The pressure created on the corresponding body parts when sitting standing or lying down a touch on the skin indicating the true vertical environmental stressors the condition of the body itself

exemple 334 The pressure created on the corresponding body parts when sitting, standing or lying down.The pressure created on the corresponding body parts when sitting, standing or lying down.

The proprioceptors do not orient an individual to his/her surroundings but ?

Question 114-32 : The relative motion and relative position of his body parts a touch on the skin our surroundings the condition in the body itself

exemple 338 The relative motion and relative position of his body parts.The relative motion and relative position of his body parts.

A stereotype and involuntary reaction of the organism on stimulation of ?

Question 114-33 : Reflex data processing control system change of stimulation level

exemple 342 Reflex.Reflex.

The amount of light which strikes the retina is controlled by ?

Question 114-34 : The pupil the ciliary body the cornea the lens

exemple 346 The pupil.The pupil.

When focussing on near objects ?

Question 114-35 : The shape of lens gets more spherical the shape of lens gets flatter the cornea gets smaller the pupil gets larger

exemple 350 The shape of lens gets more spherical.The shape of lens gets more spherical.

The ability of the lens to change its shape is called ?

Question 114-36 : Accommodation binocular vision depth perception adaptation

exemple 354 Accommodation.Accommodation.

The mechanism of accommodation is controlled by ?

Question 114-37 : The functioning of the ciliary muscle around the lens the elasticity of the optic nerves the functioning of the muscles of the eye the diameter of the pupil

.the eye accommodates for close vision by tightening the ciliary muscles allowing the pliable crystalline lens to become more rounded exemple 358 The functioning of the ciliary muscle around the lens.The functioning of the ciliary muscle around the lens.

Presbyopia is ?

Question 114-38 : Long sightedness linked with age short sightedness myopia high intra ocular pressure

exemple 362 Long sightedness linked with age.Long sightedness linked with age.

Visual acuity during flight at high altitudes can be affected by .1 anaemia.2 ?

Question 114-39 : 1 2 3 and 4 are correct 1 2 and 3 are correct 2 3 and 4 are correct 1 3 and 4 are correct

exemple 366 1, 2, 3 and 4 are correct.1, 2, 3 and 4 are correct.

Glaucoma .1 can lead to total blindness.2 can lead to undetected reduction of ?

Question 114-40 : 1 2 and 3 are correct 1 and 3 are correct 2 is false 2 and 3 are correct 1 is false 1 is correct 2 and 3 are false

exemple 370 1, 2 and 3 are correct.1, 2 and 3 are correct.

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