Question 1

Across which structure(s)does most gas exchange occur?

Accepted Answer

A)  Trachea 
B)  Bronchus 
C)  Bronchioles 
D)  Alveoli 
A)  Trachea 
B)  Bronchus 
C)  Bronchioles 
D)  Alveoli

Question 2

The pneumotaxic center and apneustic center are located within the

Accepted Answer

A)  aortic bodies. 
B)  alveoli. 
C)  pons. 
D)  spinal cord. 
A)  aortic bodies. 
B)  alveoli. 
C)  pons. 
D)  spinal cord.

Question 3

Frontal,maxillary,sphenoidal,and ethmoidal

Accepted Answer

A)  refer to the bones of the thorax. 
B)  are saliva-secreting glands. 
C)  are paranasal sinuses. 
D)  are lined with serous membrane. 
A)  refer to the bones of the thorax. 
B)  are saliva-secreting glands. 
C)  are paranasal sinuses. 
D)  are lined with serous membrane.

Question 4

Which of the following events occurs last?

Accepted Answer

A)  Contraction of the diaphragm and the intercostals 
B)  Movement of air into the lungs 
C)  Firing of the inspiratory neurons in the medulla 
D)  Firing of the phrenic and intercostal nerves 
A)  Contraction of the diaphragm and the intercostals 
B)  Movement of air into the lungs 
C)  Firing of the inspiratory neurons in the medulla 
D)  Firing of the phrenic and intercostal nerves

Question 5

Hypoventilation is most apt to

Accepted Answer

A)  increase blood pH. 
B)  induce acidosis. 
C)  cause ketosis. 
D)  cause hyperglycemia. 
A)  increase blood pH. 
B)  induce acidosis. 
C)  cause ketosis. 
D)  cause hyperglycemia.

Question 6

Which of the following structures controls respirations?

Accepted Answer

A)  Medulla oblongata 
B)  Basal ganglia 
C)  Postcentral gyrus 
D)  Limbic system 
A)  Medulla oblongata 
B)  Basal ganglia 
C)  Postcentral gyrus 
D)  Limbic system

Question 7

Which of the following is the first step in inhalation?

Accepted Answer

A)  Phrenic nerve stimulation 
B)  Activation of the NM receptors (neuromuscular junction of the phrenic nerve and diaphragm) 
C)  Firing of the medullary inspiratory neurons 
D)  Contraction of the diaphragm 
A)  Phrenic nerve stimulation 
B)  Activation of the NM receptors (neuromuscular junction of the phrenic nerve and diaphragm) 
C)  Firing of the medullary inspiratory neurons 
D)  Contraction of the diaphragm

Question 8

The nares,nostrils,and nasal septum

Accepted Answer

A)  are concerned with gas exchange. 
B)  are located in the upper respiratory tract. 
C)  contain gustatory organs. 
D)  are parts of the bronchial tree. 
A)  are concerned with gas exchange. 
B)  are located in the upper respiratory tract. 
C)  contain gustatory organs. 
D)  are parts of the bronchial tree.

Question 9

The alveoli

Accepted Answer

A)  are supported by C-shaped cartilaginous rings. 
B)  are the primary site of respiratory gas exchange. 
C)  contract and relax, thereby determining resistance to air flow through the respiratory passages. 
D)  are composed primarily of smooth muscle. 
A)  are supported by C-shaped cartilaginous rings. 
B)  are the primary site of respiratory gas exchange. 
C)  contract and relax, thereby determining resistance to air flow through the respiratory passages. 
D)  are composed primarily of smooth muscle.

Question 10

At which point in the respiratory cycle is thoracic volume the smallest?

Accepted Answer

A)  At end-inhalation 
B)  With contraction of the diaphragm 
C)  With contraction of the external intercostals 
D)  At end of exhalation 
A)  At end-inhalation 
B)  With contraction of the diaphragm 
C)  With contraction of the external intercostals 
D)  At end of exhalation

Question 11

Kussmaul respirations

Accepted Answer

A)  cause hypoxemia. 
B)  increase PCO2. 
C)  refer to an acidosis-induced increased respiratory activity. 
D)  are caused by a decrease in the plasma [H+]. 
A)  cause hypoxemia. 
B)  increase PCO2. 
C)  refer to an acidosis-induced increased respiratory activity. 
D)  are caused by a decrease in the plasma [H+].

Question 12

Which of the following structures is located in the lungs?

Accepted Answer

A)  Pharynx 
B)  Epiglottis 
C)  Alveoli 
D)  Larynx 
A)  Pharynx 
B)  Epiglottis 
C)  Alveoli 
D)  Larynx

Question 13

Which of the following structures is located both in the thoracic cavity and mediastinum but not in the pleural cavities?

Accepted Answer

A)  Lungs 
B)  Heart 
C)  Alveoli 
D)  Bronchioles 
A)  Lungs 
B)  Heart 
C)  Alveoli 
D)  Bronchioles

Question 14

The lungs are located within the

Accepted Answer

A)  mediastinum. 
B)  dorsal cavity. 
C)  spinal cavity. 
D)  thoracic cavity. 
A)  mediastinum. 
B)  dorsal cavity. 
C)  spinal cavity. 
D)  thoracic cavity.

Question 15

What is the transport mechanism necessary for the movement of oxygen from the alveoli across the pulmonary capillary membranes into the blood?

Accepted Answer

A)  Osmosis 
B)  Filtration 
C)  Diffusion 
D)  Active transport pump 
A)  Osmosis 
B)  Filtration 
C)  Diffusion 
D)  Active transport pump

Question 16

Intra-alveolar surface tension is caused by

Accepted Answer

A)  acid. 
B)  mucus. 
C)  water. 
D)  bicarbonate. 
A)  acid. 
B)  mucus. 
C)  water. 
D)  bicarbonate.

Question 17

Respirations are primarily controlled by the

Accepted Answer

A)  medulla oblongata. 
B)  cerebellum. 
C)  spinal cord. 
D)  frontal lobe. 
A)  medulla oblongata. 
B)  cerebellum. 
C)  spinal cord. 
D)  frontal lobe.

Question 18

What is the primary concern with laryngospasm and swelling of the lips and tongue?

Accepted Answer

A)  Interruption of the negative pressure within the intrapleural space 
B)  Indication of accumulation of water in the alveoli as in pulmonary edema 
C)  Acute upper airway obstruction 
D)  Indication of damage of the phrenic nerve 
A)  Interruption of the negative pressure within the intrapleural space 
B)  Indication of accumulation of water in the alveoli as in pulmonary edema 
C)  Acute upper airway obstruction 
D)  Indication of damage of the phrenic nerve

Question 19

Which of the following are the accessory muscles of respiration (used in forced exhalation)?

Accepted Answer

A)  Intercostals and diaphragm 
B)  Sternocleidomastoid and trapezius 
C)  Internal intercostals and the abdominal muscles 
D)  Pectoralis major and serratus anterior 
A)  Intercostals and diaphragm 
B)  Sternocleidomastoid and trapezius 
C)  Internal intercostals and the abdominal muscles 
D)  Pectoralis major and serratus anterior

Question 20

The epiglottis

Accepted Answer

A)  is innervated by the phrenic nerve. 
B)  prevents air from entering the esophagus. 
C)  prevents food from entering the trachea. 
D)  is the Adam's apple. 
A)  is innervated by the phrenic nerve. 
B)  prevents air from entering the esophagus. 
C)  prevents food from entering the trachea. 
D)  is the Adam's apple.

Exam 22: Respiratory System

Across which structure(s)does most gas exchange occur?

The pneumotaxic center and apneustic center are located within the

Frontal,maxillary,sphenoidal,and ethmoidal

Which of the following events occurs last?

Hypoventilation is most apt to

Which of the following structures controls respirations?

Which of the following is the first step in inhalation?

The nares,nostrils,and nasal septum

The alveoli

At which point in the respiratory cycle is thoracic volume the smallest?

Kussmaul respirations

Which of the following structures is located in the lungs?

Which of the following structures is located both in the thoracic cavity and mediastinum but not in the pleural cavities?

The lungs are located within the

What is the transport mechanism necessary for the movement of oxygen from the alveoli across the pulmonary capillary membranes into the blood?

Intra-alveolar surface tension is caused by

Respirations are primarily controlled by the

What is the primary concern with laryngospasm and swelling of the lips and tongue?

Which of the following are the accessory muscles of respiration (used in forced exhalation)?

The epiglottis

Introduction to the Human Body

Basic Chemistry

Cells

Cell Metabolism

Microbiology Basics

Tissues and Membranes

Integumentary System and Body Temperature

Skeletal System

Muscular System

Nervous System: Nervous Tissue and Brain

Nervous System: Spinal Cord and Peripheral Nerves

Autonomic Nervous System

Sensory System

Endocrine System

Blood

Anatomy of the Heart

Function of the Heart

Anatomy of the Blood Vessels

Functions of the Blood Vessels

Lymphatic System

Immune System

Digestive System

Urinary System

Water, Electrolyte, and Acid-Base Balance

Reproductive Systems

Human Development and Heredity

Filters