BIOS 255 Anatomy & Physiology III with Comprehensive Lab
Exam Questions & 100% Verified Answers Latest Update 2026
(Grade A+) - Chamberlain
____________ channels respond to changes in membrane potential. -
VERIFIED ANSWER - Voltage-gated
Calcium must bind to which protein to initiate muscle contraction? -
VERIFIED ANSWER - Troponin
Which of the following best describes the type of contraction in which a
muscle remains the same length as it maintains tension? - VERIFIED
ANSWER - Isometric contraction
The receptor cells for olfaction are located in the
________________________. - VERIFIED ANSWER - Olfactory epithelium
Which of the following regulatory proteins covers the myosin-binding
sites on actin? - VERIFIED ANSWER - Tropomyosin
,The area of the retina that is densely concentrated with cones and is the
center of highest visual acuity is known as the _______________. -
VERIFIED ANSWER - Fovea centralis
Which leukocytes are activated during parasitic infections? - VERIFIED
ANSWER - Eosinophils
In which body systems are mucous membranes found? - VERIFIED
ANSWER - Respiratory system, Digestive system, Urinary system
Which substance keeps the skin from becoming cracked and dry? -
VERIFIED ANSWER - sebum
Which leukocyte binds to a target cell and releases perforins that create
pores in the plasma membrane? - VERIFIED ANSWER - Natural killer (NK)
cells
Which type of protective cells are the first to arrive at the site of injury or
infection and engage in phagocytosis? - VERIFIED ANSWER - Neutrophils
,What is the primary function of interferons in the immune system? -
VERIFIED ANSWER - Activate antiviral defenses in nearby cells
Which cardinal symptom of inflammation is caused by increased fluid
escaping into the tissues at the site of inflammation? - VERIFIED ANSWER -
Swelling (tumor)
What is the primary component of the epidermal layer of the skin that
forms a tough barrier against pathogens? - VERIFIED ANSWER - Keratin
A pyrogen induces what in the body? - VERIFIED ANSWER - fever
Which enzyme found in mucus, tears, and saliva is responsible for
destroying bacteria by dissolving their cell walls? - VERIFIED ANSWER -
Lysozyme
What structure is used by both the respiratory and digestive systems? -
VERIFIED ANSWER - Oropharynx
which of the following layers is found lining the surface of the lungs? -
VERIFIED ANSWER - Visceral pleura
, What structure in the upper respiratory division plays an important role
in warming and humidifying inspired air? - VERIFIED ANSWER - Nasal
conchae
Which alveolar cells secrete pulmonary surfactant? - VERIFIED ANSWER -
Great alveolar cells
Which nerve innervates the prime muscle of respiration? - VERIFIED
ANSWER - Phrenic nerve
Which is not a conducting zone structure? - VERIFIED ANSWER -
respiratory bronchioles
Gases move across the respiratory membrane between tissues and blood
via which transport mechanism? - VERIFIED ANSWER - Simple diffusion
Which of the following lobes of the brain contains the primary visual
cortex? - VERIFIED ANSWER - Occipital
Exam Questions & 100% Verified Answers Latest Update 2026
(Grade A+) - Chamberlain
____________ channels respond to changes in membrane potential. -
VERIFIED ANSWER - Voltage-gated
Calcium must bind to which protein to initiate muscle contraction? -
VERIFIED ANSWER - Troponin
Which of the following best describes the type of contraction in which a
muscle remains the same length as it maintains tension? - VERIFIED
ANSWER - Isometric contraction
The receptor cells for olfaction are located in the
________________________. - VERIFIED ANSWER - Olfactory epithelium
Which of the following regulatory proteins covers the myosin-binding
sites on actin? - VERIFIED ANSWER - Tropomyosin
,The area of the retina that is densely concentrated with cones and is the
center of highest visual acuity is known as the _______________. -
VERIFIED ANSWER - Fovea centralis
Which leukocytes are activated during parasitic infections? - VERIFIED
ANSWER - Eosinophils
In which body systems are mucous membranes found? - VERIFIED
ANSWER - Respiratory system, Digestive system, Urinary system
Which substance keeps the skin from becoming cracked and dry? -
VERIFIED ANSWER - sebum
Which leukocyte binds to a target cell and releases perforins that create
pores in the plasma membrane? - VERIFIED ANSWER - Natural killer (NK)
cells
Which type of protective cells are the first to arrive at the site of injury or
infection and engage in phagocytosis? - VERIFIED ANSWER - Neutrophils
,What is the primary function of interferons in the immune system? -
VERIFIED ANSWER - Activate antiviral defenses in nearby cells
Which cardinal symptom of inflammation is caused by increased fluid
escaping into the tissues at the site of inflammation? - VERIFIED ANSWER -
Swelling (tumor)
What is the primary component of the epidermal layer of the skin that
forms a tough barrier against pathogens? - VERIFIED ANSWER - Keratin
A pyrogen induces what in the body? - VERIFIED ANSWER - fever
Which enzyme found in mucus, tears, and saliva is responsible for
destroying bacteria by dissolving their cell walls? - VERIFIED ANSWER -
Lysozyme
What structure is used by both the respiratory and digestive systems? -
VERIFIED ANSWER - Oropharynx
which of the following layers is found lining the surface of the lungs? -
VERIFIED ANSWER - Visceral pleura
, What structure in the upper respiratory division plays an important role
in warming and humidifying inspired air? - VERIFIED ANSWER - Nasal
conchae
Which alveolar cells secrete pulmonary surfactant? - VERIFIED ANSWER -
Great alveolar cells
Which nerve innervates the prime muscle of respiration? - VERIFIED
ANSWER - Phrenic nerve
Which is not a conducting zone structure? - VERIFIED ANSWER -
respiratory bronchioles
Gases move across the respiratory membrane between tissues and blood
via which transport mechanism? - VERIFIED ANSWER - Simple diffusion
Which of the following lobes of the brain contains the primary visual
cortex? - VERIFIED ANSWER - Occipital
