BNNS501 Exam 2 ACTUAL QUESTIONS
AND CORRECT ANSWERS
Light refraction in the eyes - CORRECT ANSWER Due mainly to the Iris, Retina,
Cornea, and Ciliary body.
Accommodation to a near object - CORRECT ANSWER Constriction and convergence
of pupils.
Fovea centralis - CORRECT ANSWER The place where mostly only cones occur.
Fluid filled space between the cornea and lens - CORRECT ANSWER Known as the
Anterior chamber.
Function of the auditory meatus - CORRECT ANSWER Transmit sound waves to the
middle ear.
Vestibule - CORRECT ANSWER Allows air pressure to be equalised on either side of
the tympanic membrane.
Age related hearing loss - CORRECT ANSWER Known as Presbycusis.
Structure preventing food and liquids entering the trachea - CORRECT
ANSWER Known as the Epiglottis.
Functions of the larynx - CORRECT ANSWER Is a switching mechanism to prevent
food and drink entering the larynx and trachea.
Sinuses function - CORRECT ANSWER Lighten the weight of the skull and resonate
sound.
, Haemoglobin binds to oxygen - CORRECT ANSWER To form Oxyhaemoglobin.
Majority of carbon dioxide transport - CORRECT ANSWER As Bicarbonate ions.
Internal respiration - CORRECT ANSWER Refers to gas exchange between blood and
tissues.
External respiration - CORRECT ANSWER Occurs in the Alveoli.
Hypercapnia - CORRECT ANSWER High levels of carbon dioxide in the blood.
Hypoxaemia - CORRECT ANSWER Indicates a decrease in the PO2 in the blood.
Age-related changes to the respiratory system - CORRECT ANSWER Include
decreased lung capacity.
Airway resistance increases - CORRECT ANSWER When the bronchioles constrict.
Normal inspiration - CORRECT ANSWER Involves External intercostals, ↑ thoracic
volume, ↓ thoracic pressure.
Normal expiration - CORRECT ANSWER Is primarily a Passive process.
Three layers of the heart wall - CORRECT ANSWER From outermost to innermost:
Pericardium, myocardium, endocardium.
Superior vena cava - CORRECT ANSWER Carries blood to the Right atrium.
Pericardium - CORRECT ANSWER Anchors the heart
AND CORRECT ANSWERS
Light refraction in the eyes - CORRECT ANSWER Due mainly to the Iris, Retina,
Cornea, and Ciliary body.
Accommodation to a near object - CORRECT ANSWER Constriction and convergence
of pupils.
Fovea centralis - CORRECT ANSWER The place where mostly only cones occur.
Fluid filled space between the cornea and lens - CORRECT ANSWER Known as the
Anterior chamber.
Function of the auditory meatus - CORRECT ANSWER Transmit sound waves to the
middle ear.
Vestibule - CORRECT ANSWER Allows air pressure to be equalised on either side of
the tympanic membrane.
Age related hearing loss - CORRECT ANSWER Known as Presbycusis.
Structure preventing food and liquids entering the trachea - CORRECT
ANSWER Known as the Epiglottis.
Functions of the larynx - CORRECT ANSWER Is a switching mechanism to prevent
food and drink entering the larynx and trachea.
Sinuses function - CORRECT ANSWER Lighten the weight of the skull and resonate
sound.
, Haemoglobin binds to oxygen - CORRECT ANSWER To form Oxyhaemoglobin.
Majority of carbon dioxide transport - CORRECT ANSWER As Bicarbonate ions.
Internal respiration - CORRECT ANSWER Refers to gas exchange between blood and
tissues.
External respiration - CORRECT ANSWER Occurs in the Alveoli.
Hypercapnia - CORRECT ANSWER High levels of carbon dioxide in the blood.
Hypoxaemia - CORRECT ANSWER Indicates a decrease in the PO2 in the blood.
Age-related changes to the respiratory system - CORRECT ANSWER Include
decreased lung capacity.
Airway resistance increases - CORRECT ANSWER When the bronchioles constrict.
Normal inspiration - CORRECT ANSWER Involves External intercostals, ↑ thoracic
volume, ↓ thoracic pressure.
Normal expiration - CORRECT ANSWER Is primarily a Passive process.
Three layers of the heart wall - CORRECT ANSWER From outermost to innermost:
Pericardium, myocardium, endocardium.
Superior vena cava - CORRECT ANSWER Carries blood to the Right atrium.
Pericardium - CORRECT ANSWER Anchors the heart
