A&P Final

What part of the brain brings about changes in respiration when you become very angry?

The hypothalamus

What happens in the respiratory system if pneumocytes type II are not functioning properly or are destroyed?

The surface tension would make the alveoli smaller and cause them to collapse upon exhalation.

About 23% of CO2 attaches to the protein portion of hemoglobin molecules resulting in a molecule called

carbaminohemoglobin

The parasympathetic division of the ANS causes __________ of airways' smooth muscle; therefore, resistance is __________.

contraction; increased

The body of a person living at a high altitude would experience all of the following changes except __________. 1. increased BPG levels 2. decreased respiratory rate 3. increased heart rate 4. elevated hematocrit

decreased respiratory rate

With regard to local regulation of gas transport, if the PCO2 in the bronchioles increases, the bronchioles __________.

dilate

An increase in the PCO2 of arterial blood above normal is called

hypercapnia

Peripheral chemoreceptors in the aortic bodies transmit impulses to the central nervous system via the _______________ nerve.

vagus

During quiet breathing, the diaphragm and external intercostal muscles contract. What effect does this have on the thoracic cavity?

It increases the volume and decreases the pressure of the thoracic cavity.

During quiet inspiration, what muscles does the DRG control

Diaphragm and external intercostals

Which of the following happens during external respiration?

Gas exchange between the air in the alveoli and the pulmonary capillary blood