Contraction of the bronchiolar smooth muscle has which of theseeffects?a. A smaller pressure gradient is required to get the same rate of airflow,compared with normal bronchioles.b. It increases airflow through the bronchioles.c. It increases resistance to airflow.d. It increases alveolar ventilation.

Q: Immediately after the creation of an opening through the thorax intothe pleural cavitya. air flows…

A: Discussing about creation of an opening through the thorax into the pleural cavity.

Q: Compare the timing of respiratory movements during speech and tidal breathing. Compared to…

A: For speech, the expiratory phase is much longer, more drawn out. For speech, the inspiratory phase…

Q: Which of the following is where gas exchange occurs? A. alveoli B. trachea C. intercostal muscles…

A: During the process of gaseous exchange, oxygen moves from the lungs to the blood stream and at the…

Q: The visceral pleura covers thea. outer surface of the lung.b. gas exchange surface of the alveoli.c.…

A: The lungs are the primary respiratory organs responsible for performing respiration or gaseous…

Q: The larynxa. connects the oropharynx to the trachea.b. has three single and six paired cartilages.c.…

A: The larynx is placed within the anterior aspect of the neck . The larynx helps to protect the lower…

Q: Which of the following statements is CORRECT? Select one: a. Reduction of atmospheric air pressure…

A: Alveoli are the sacs that are meant to bring about gaseous exchange from the blood. Alveolar PO2 is…

Q: After a person hyperventilates (such as by holding their breath), what can be detected on a…

A: Respiratory system- It is one of the systems in the human body that helps in the exchange of gases…

Q: What happens to Vital Capacity of someone with emphysema? a. Vital capacity stays the same, because…

A: The volume of air expired by the lungs after forceful inspiration and expiration is called vital…

Q: What is the role of alveolar macrophages?a. to secrete pulmonary surfactantb. to secrete…

A: Macrophages: These are the type of white blood cell. Human macrophages are about 21 micrometers.…

Q: Type II alveolar cell…  A. senses 02 level and sends that information to the respiratory centers in…

A: Produces surfactant to counteract the surface tension that would collapse the alveoli

Q: Choose the best answer for following question Which of the following is not true of obstructive…

A: Respiration is the process by which oxygen is taken up from the atmosphere and carbon dioxide is…

Q: Which is/are part of the respiratory membrane?   a. Plasma membrane of red blood cells   b. Type…

A: The respiratory system is responsible for the exchange of oxygen and carbon di-oxide between the…

Q: In humans, the respiratory control centera. is stimulated by carbon dioxide.b. is located in the…

A: Respiratory control center is located in the medulla oblongata, whose main function is to transmit…

Q: Which of the following patients has adequate respirations? a. 55 year old woman with paradoxical…

A: Assessment of respiratory system is essential to identify the lung function and associated disease…

Q: Inspiration occurs when barometric pressure:   A. Is the same as alveolar pressure B. Is higher…

A: Alveolar pressure is determined whether air will flow into the lungs. The ability to breath is…

Q: The apneustic center is involved ina. inhibition of the pneumotaxic area.b. stimulation of DRG.c.…

A: The apneustic center is situated in the lower pons, underneath the medulla. The apneustic center is…

Q: At rest, Emma typically takes thirteen 400 mL breaths per minute and she has an anatomical deadspace…

A: The dead space is the volume of the air which is inhaled, however, this does not get exchanged…

Q: Gas exchange that occurs at the level of the tissues iscalled ________.a. external respirationb.…

A: Lungs perform important role in gas exchange between the external environment and the internal…

Q: Which statement describes how carbon dioxide exits the bloodstream at its final destination?

A: Diffusion is the process which resulting from random motion of molecules by which there is a net…

Q: when carbon dioxide travelling in the plasma reaches the alveolus and is exhaled, then what happens…

A: Introductio:- the respiratory system are to provide adequate oxygen supply (O2) to meet the needs of…

Q: Contraction of the diaphragm and external intercostal muscles is an active process leads to: a.…

A: Respiration is an active process with two distinct steps - inhalation and exhalation. The process…

Q: Gas exchange between systemic blood vessels and the tissues is called a. Tubular secretion b.…

A: There are two forms of respiration which are- internal respiration and external respiration. In…

Q: Ali, aged 28, normally does not suffer from asthma. However, he has an asthma attack at his work.…

A: Asthma is a condition where the air passage of a person becomes narrow or shows signs of…

Q: How is inhaled air modifi ed before it reaches the lungs?a. It must be humidifi ed.b. It must be…

A: Respiration defines the movement of oxygen from the surroundings to the cells within tissues. The…

Q: What produces the main driving force which drives quiet expiration? A. contraction of the…

A: C. Elasticity of the diaphragm muscle.

Q: Which statement is false about the trachea?a. It is lined with a nonkeratinized stratified…

A: The respiratory system is one of the important systems in the body that helps in the exchange of…

Q: What occurs as air descends down through the conducting zone and respiratory zone structure? a.…

A: The respiratory system is divided into two major zones, the conducting zone and the respiratory…

Q: The outer muscular walls of the pharynx include A. The pharyngeal constrictors B. Stylopharyngeus C.…

A: Pharynx is a part of oral cavity just at the back region of the nose from which the food material…

Q: _____________ is secreted by type II alveolar cells in the mammalianlungs and prevents the collapse…

A: Answer is option e.) Surfactant.

Q: Most of the CO2 that diffuses from theblood into an alveolus comes froma. dissolved gas.b.…

A: Carbon dioxide, a by-product of cellular metabolism, is relatively rich in blood returning from…

Q: Ventilation of alveoli above the needs of metabolism tends to

A: Exchange of gases occurring between alveoli and the capillaries is called external respiration.…

Q: The horizontal fissure separates theA. middle and upper lobes of the right lung.B. upper and lower…

A: There are two lungs in human body, right lung and left lung.

Q: Which structure is the last, smallest portion of the conductingportion of the respiratory system?a.…

A: The respiratory system in humans is a vital system that allows the exchange of respiratory gases…

Q: The Law of LaPlace predicts that alveoli at constant wall tension are unstable because a. Small…

A: Surface tension – it is defined as the cumulative effect of the forces that are generated by the…

Q: Which part of the airway does smooth muscle play its greatest role in Poiseuille's Law? O A. Trachea…

A: Poiseuille's law describes the flow of fluids through cylindrical tubes, such as blood vessels or…