1
BIOD 151 Final Exam 2025 From Portage Learning Includes Accurate And Verified Questions Covering Human Anatomy And Physiology. Topics Include Body Systems Such As Cardiovascular, Respiratory, Digestive, Nervous, Musculoskeletal, Urinary, And Endocrine, As Well As Foundational Concepts Like Homeostasis, Cellular Function, And Basic Medical Terminology.
You are observing two cells under the microscope. They are the same type of eukaryotic cell but one appears much larger. Based on appearance alone, which one would you expect to be carrying out respiration at a more active rate, the larger or smaller cell?Explain why. - ANSWER-The smaller cell. Cells need to remain relatively small because as a cell expands the amount of surface area relative to the volume of the cell decreases. The smaller cell is more active because relative to its volume, its surface area is larger than a bigger cell. With a larger surface area (relative to its volume) this allows the metabolic processes to occur faster.
*
80 1 / 4
2
Q
Ω FS
Quiz Sco
How many lobes does the right human lung have? - ANSWER- Three Lobes
Air and food pass in which one of the following areas: -
ANSWER-Oropharynx
Rings of cartilage line much of the respiratory tract. In which of one the following would cartilage NOT be found? - ANSWER- Alveoli
Explain what happens to the soft palate during swallowing.Why? - ANSWER-The upward movement of the soft palate prevents food or liquid from entering the nasal passages during swallowing.
- / 4
3
Explain at least two differences between Type I and Type II alveolar cells. - ANSWER-a. Type I form the very thin simple squamous epithelium of the alveoli in junction with capillaries.Make up roughly 95% of alveolar epithelial cells.
- Type II produce and secrete pulmonary surfactant which is
needed throughout the alveolar surface to keep the alveoli open.
In addition, Type II cells can divide to replace damaged Type I cells. Make up roughly 5% of alveolar epithelial cells.
True/False: Positive pressure is used to move air into the lungs. -
ANSWER-false (negative pressure)
True/False: During inhalation the diaphragm contracts to pull
the lungs open. - ANSWER-True
True/False: During inhalation the rib cage is lowered, pulling the
lungs open. - ANSWER-False - rib cage is lifted upward during inhalation
- / 4
4
True/False: As the thoracic cavity expands and lung volume
increases, the density of the gases filling the lungs decreases. - ANSWER-True
True/False: As the rib cage expands during inhalation, air will
naturally flow into the lungs. - ANSWER-True (air will naturally flow into the lungs because of the negative pressure inside the lungs)
According to Charles's Law gas volume is: - ANSWER-Directly
proportional to its temperature
Which one of the following tracheal cartilages are paired? - ANSWER-Arytenoid
Which cells are most abundant within the alveoli? - ANSWER- macrophages
Which one of the following is not true of the respiratory physiology? - ANSWER-Tidal volume is the maximum amount of air able to be inhaled beyond normal inhalation
- / 4