MC GrawHill Biology Exam

Question 1

MC GrawHill Biology Exam. Emotional states are integrated by the ________, which generates an output that creates such respiratory variations as laughing and crying.

• VRG
• PRG
• DRG
• SRG
• TRG

---

Question 2

Which of the following is directly related to respiratory production of carbon dioxide?

• Regulation of blood pressure
• The synthesis of vasodilators
• Aids in defecation
• Regulation of pH
• Regulation of body temperature

---

Question 3

Which of the following does not contain ciliated cells?

• Nasal cavity
• Trachea
• Primary bronchus
• Terminal bronchiole
• Laryngopharynx

---

Question 4

Which of the following is not a function of the respiratory system?

• Control of pH
• Promotes the flow of lymph and venous blood MC GrawHill Biology Exam
• Helps regulate blood pressure
• Assists in the synthesis of vasodilators
• Aids in defecation

---

Question 5

Which of the following sets of conditions would shift the oxyhemoglobin dissociation curve to the right?

• $\uparrow PO_2, \downarrow PCO_2, \uparrow$ temperature, $\uparrow BPG$
• $\uparrow PO_2, \downarrow PCO_2, \uparrow$ temperature, $\uparrow BPG$
• $\downarrow PO_2, \uparrow PCO_2, \uparrow$ temperature, $\uparrow BPG$
• $\downarrow PO_2, \uparrow PCO_2, \uparrow$ temperature, $\uparrow BPG$
• $\downarrow PO_2, \uparrow PCO_2, \downarrow$ temperature, $\uparrow BPG$

---

Question 6

Mucus plays an important role in cleansing inhaled air. It is produced by ________ of the respiratory tract.

• squamous alveolar cells
• great alveolar cells
• the pleurae
• ciliated cells
• goblet cells

---

Question 7

During exercise, which of the following directly increases respiratory rate?

• Increased $H^+$ level in the blood
• The Bohr effect
• Reduced blood pH
• Reduced oxyhemoglobin
• Anticipation of the needs of exercising muscle

---

Question 8

Carbon dioxide is transported by all the following means except ________.

• carbaminohemoglobin MC GrawHill Biology Exam
• carbonic acid
• carbonate
• bicarbonate ions
• dissolved gas

---

Question 9

Which structure is highlighted (reference leader line)?

• laryngeal cartilages
• hyoid bone
• thyrohyoid ligament
• tracheal cartilages
• cricothyroid ligament

---

Question 10

Which center bears the primary responsibility for generating the respiratory rhythm, but is influenced by several other centers? MC GrawHill Biology Exam

• PRG
• DRG
• VRG
• SRG
• TRG

---

Question 11

The pH of the cerebrospinal fluid is monitored by which of these brainstem centers?

• PRG
• Hypothalamic osmoreceptors
• Medullary baroreceptors
• Central chemoreceptors
• Hypothalamic thermoreceptors MC GrawHill Biology Exam

---

Question 12

Each hemoglobin molecule can transport up to ________ oxygen molecules.

• 6
• 2
• 3
• 4
• 5

---

Question 13

Which structure is highlighted (reference leader line)?

• left lobar bronchus
• left segmental bronchus
• right segmental bronchus
• intermediate bronchus
• right lobar bronchus

---

Question 14

Which of the following would lead to anemic hypoxia?

• Sickle-cell disease
• Emphysema
• Squamous-cell carcinoma
• Asthma
• Atelectasis

---

Question 15

Which of the following are the most numerous cells in the lungs? MC GrawHill Biology Exam

• Type I alveolar cells
• Type II alveolar cells
• Dust cells
• Vibrissae
• Ciliated cells

---

Question 16

Which structure is highlighted (reference leader line)?

• Nasal vestibule
• Nasal conchae
• Nasopharynx
• Oropharynx
• Laryngopharynx

---

Question 17

Conditions such as anxiety and pain cause ________.

• an increased respiratory rate
• an increased respiratory rate
• an increased respiratory rate
• a decreased respiratory rate
• a decreased respiratory rate

---

Question 18

Most of the $CO_2$ that diffuses from the blood into the alveoli comes from ________.

• Carbaminohemoglobin
• Carboxyhemoglobin
• Dissolved gas
• Carbonic acid
• Bicarbonate ions

---

Question 19

The ________ is/are only part of the respiratory tract that is/are lined with pseudostratified ciliated columnar epithelium.

• nasopharynx
• oropharynx
• laryngopharynx
• oropharynx and laryngopharynx
• nasopharynx, oropharynx, and laryngopharynx