FREE BIOLOGY AND STUDY GAMES ABOUT BIO 122 4

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FREE BIOLOGY AND STUDY GAMES ABOUT BIO 122 4

EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -153 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: what is the above the trachea

Answer:

the larynx

Question 2: do the moist pleural membranes help expand or deflate the lungs

Answer:

expand Question 3: larynx: def; houses the what;

Answer:

an enlargement in the airway superior to the trachea and inferior to the pharynx composed of muscles cartilage bound by elastic tissue; vocal cords Question 4: bronchial tree: as the tube becomes smaller what changes in the cells that line the tube

Answer:

from pseudostratisfied ciliated epithelium with goblet cells to simple squamous epithelium closely associated with a dense network of capillaries

Question 5: what is the most important CO2 transport mechanism

Answer:

bicorbonate ions

Question 6: surfactant reduces the tendency of ____ to collapse

Answer:

alveoli Question 7: expiration: why is it considered passive

Answer:

b/c the normal resting expiration occurs without the contraction of muscles Question 8: pneumotaxic area: sends impulses where ; what happens when the impulses are strong; what happens if the impulses are slow

Answer:

to the dorsal group to regulate breathing rate; inspiratory bursts are shorter to speed up breathing; breath rate slows

Question 9: does oxygen play a major role in respiration

Answer:

no

Question 10: what structure is shared with the digestive system

Answer:

the pharynx Question 11: bronchial tree: the intralobular bronchi branch to what

Answer:

terminal broncials

Question 12: the bronchial tree leads from the trachea to where

Answer:

the alveolar sacs

Question 13: what is the atmospheric pressure at sea level e

Answer:

760 mm of mercury Question 14: CO2 reacts with water to form what; what enzyme speeds up the reaction between CO2 and water ; so CO2 is carried in the blood to the lungs as what

Answer:

carbonic acid; carbonic anhydrase; HCO3

Question 15: why does blood flowing through the capillaries gain carbon dioxide

Answer:

b/c the tissues have high PCO2 Question 16: what 3 things increases the amount that of O2 that a\xyhemoglobin releases; this explains what during exercise

Answer:

concentration of carbon dioxide; acidity; and temp; why more o2 is released from blood during exercise Question 17: bronchial tree: terminal bronchials branch to what

Answer:

respiratory bronchioles Question 18: glottis: what happens to it when food it swallowed

Answer:

the muscles close the glottis within the false vocal folds, this prevents food from entering the trachea

Question 19: what binds more tightly and readily to hemoglobin than O2

Answer:

Carbon monoxide Question 20: nonrespiratory air movements: def of laughing ; similar to what

Answer:

a person takes a breath and releases it in a series of short expirations; crying

Question 21: lungs: what one is larger ; name the 3 parts of the right lung; name the left lung

Answer:

the right lung; superior, middle, inferior; superior and inferior Question 22: alveolar ventilation: def; calculated by what ; ex

Answer:

this is the amount of air that reaches the alveoli for gas exchange; the physiologic deaf space - tidal volume X breaths per minute; (150-500=350 x 12= 4200 mL/minute Question 23: nonrespiratory air movements: def of yawning

Answer:

cause unknown, reason unknwon

Question 24: expiration is caused by what

Answer:

the elastic recoil of the tissues Question 25: surfactant: what is it ; this prevents the air sacs from what; with out the surfactant what could happen to air sacs

Answer:

the lipoprotein secreted by alveolar cells; collapsing during inhalation; the pleural membranes could collapse the air sacs Question 26: diffusion in resp. mem: why is the net movement of CO2 from the blood to the alveolus; why is the net movement of oxygen to the blood

Answer:

blood from body to lungs has PO2 of 45 mm and PC02 in alveolus is 40 so co2 goes to alveolus; onxygen has po2 40 in blood and p02 104 in alveolus so movement is to blood Question 27: trachea: what do the cartilage rings do ; what does the soft tissue between the rings allow for

Answer:

the prevent the trachea from collapsing and blocking the airway; allow the posterior esophagus expand as food moves through to the stomach