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Anatomy and Physiology
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Anatomy and Physiology
- Page 145
Organisation of the Body
41
Cells and Tissues
129
Measurement, Errors, Data and Unit Conversion
45
Integument
65
Homeostasis
0
Skeleton and Joints
100
Muscles
98
Gastrointestinal System
140
Endocrine System
102
Renal System
117
Cardiovascular System
365
Respiratory System
130
Nervous System
292
Reproductive System
72
The Physics of Waves: Light Waves, Sound Waves and Ultrasound
62
Ionising Radiation
92
Electricity
35
Biomechanics
58
Body Temperature, Energy and Heat Loss
70
Chemistry for Physiology
279
Show/Hide Answers
Body Temperature, Energy and Heat Loss
Which heat loss avenues are reduced by wearing clothes?
Radiation and evaporation
Conduction and convection
Evaporation and convection
Radiation and conduction
Clothes trap air between the clothes and skin, minimising convection. Clothes lying between skin and a contacting surface insulate against conducting losses. Radiation is not prevented by clothing.
Author:
rikazzz
Comment
Cardiovascular System
What does the term “systolic pressure” refer to?
The value, in mmHg, that appears in the denominator of a blood pressure measurement
The peak pressure in the blood due to the contraction of the left ventricle
The minimum pressure in the aorta prior to left ventricular contraction
The difference between maximum and minimum arterial blood pressures
It is the maximum pressure produced by the LV during contraction (while the body is at rest).
Author:
rikazzz
Comment
Respiratory System
To what does the term “external respiration” refer?
Ventilation of the lungs (breathing)
Exchange of gases between alveolar air and lung capillaries
The production by cells of ATP from small molecules and oxygen
Exchange of dissolved gases between capillary blood and body tissues
When gas moves from the alveoli (“outside”) to the blood in pulmonary capillaries (“inside”), this is known as external respiration.
Author:
rikazzz
Comment
Cells and Tissues
What is the name of the membrane that surrounds the lungs?
Visceral peritoneum
Parietal peritoneum
Visceral pleura
Dura mater
Pleura is around the lungs, while visceral refers to the layer of the pleura that is attached to the lung surface.
Author:
rikazzz
Comment
Muscles
Which protein(s) are found in thin myofilaments?
Actin
Actin and tropomyosin
Actin, tropomyosin and troponin
Actin, myosin, tropomyosin and troponin
Actin is the major component of a thin filament. Tropomyosin covers the biding site, while troponin provides the mechanism for removing tropomyosin from the binding site.
Author:
rikazzz
Comment
Renal System
The descending limb of the loop of Henle is permeable to water, so water diffuses out of the descending limb into the interstitial fluid. What happens to this water?
It flows through the renal papillae into the minor calyces to become urine.
It diffuses into the ascending limb of the loop of Henle.
It diffuses into the peritubular capillaries and ascending vasa recta for return to the blood.
It diffuses into the filtrate for elimination from the body.
Water (and solutes) that are reabsorbed from the filtrate return to the blood stream via the peritubular capillaries and the vasa recta.
Author:
rikazzz
Comment
Cardiovascular System
Which one of the following descriptions or statements about an electrocardiogram (ECG) is NOT correct?
It is a record of the voltage changes (as measured at the body surface) due to the depolarisation of the muscle cells of the heart as it beats.
The potentials measured by the ECG electrodes are combined in various ways to give 12 different ECGs.
The ECG consists of the electrical events that follow the depolarisation of ventricles (PQR section), the depolarisation of atria (the S section) and the repolarisation of the ventricles (the T section).
The value of the potential difference called “limb lead II” varies with time to produce the familiar ECG trace – a graph of voltage vs time.
The ECG also displays the depolarisation of the atria (the P wave); the depolarisation of the ventricles results in the QRS wave – not the PQR wave.
Author:
rikazzz
Comment
Gastrointestinal System
What pancreatic enzyme digests lipids to free fatty acids and monoglycerides?
Lipase
Bile
Cholecystokinin
Lingual lipase
The “lip-” part of lipase indicates that it digests lipids, while the “-ase” part is indicative of an enzyme. Lingual lipase is produce by the salivary glands, not the pancreas.
Author:
rikazzz
Comment
Respiratory System
What is the number of breaths per minute called? The:
Respiratory rate
Respiratory speed
Pulmonary index
Respiratory volume
Respiratory rate is stated in breaths per minute.
Author:
rikazzz
Comment
Body Temperature, Energy and Heat Loss
How does subcutaneous adipose tissue assist the body to regulate its temperature?
It conducts heat more readily than lean tissue so promotes heat loss.
It stores heat energy so acts like a “heat sink”.
It produces sweat for secretion via sweat glands.
It conducts heat less readily than lean tissue so insulates the body.
Adipose tissue (fat) conducts heat less readily than does lean tissue. Hence a layer of fat insulates the body against heat loss.
Author:
rikazzz
Comment
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