Explanation:
a. Nasal cavity: the epithelium in this zone is meant to provide a physical barrier to the invasion of microorganism or particles, it also secretes and remove mucus and foreign particles, these epithelial cells are also involved in the igE producing process (perpetuating allergic responses. <em>The nose is the first barrier to the air that enters our body, that's why the epithelial cells in this zone focus in filtering foreign particles. </em>
b. Bronchiole: epithelium is ciliated and no ciliated, it becomes cuboidal in smaller passages as it continues to branch. The no ciliated cells, also known as club cells are the ones that produce surfactant. <em>Since bronchioles are passages to direct the air to the alveoles epithelial cells in this zone have adapted to go from larger branches to smaller ones to reach the alveoli. </em>
c. Alveolus: it's composed of two types of cells, type one, that constitute the air-blood barrier and type two, cells that produce surfactant to reduce surface tension to keep the alveolus shape when breathing.<em> Since alveoli's function is to allows oxygen/carbon dioxide to move between bloodstream the epithelial cells in this organ evolved to cover this job.</em>
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Answer:
a. Absent p wave is present in atrial fibrillation.
b. Abnormally long QRS complex is present in right or left bundle branch block.
c. Abnormally long PR interval is present in first degree heart block.
d. extra QRS complexes are present in abnormal pacemaker or abnormal conducted beat.
Explanation:
By reading the ECGS we can fine a number of abnormalities by simply locating problems in P, QRS, T waves, PR intervals and ST segments.
Absent P wave in an ECG represents Atrial fibrillation or sinoatrial arrest. Atrial fibrillation is an abnormal heart rhythm also know as arrhythmia characterized by rapid and irregular beating of the atrial chambers of the heart.
Abnormally long QRS complex represents Right or left bundle branch block, hyperkalemia, drug induced or abnormal ventricular rhythm.
Abnormally long PR interval represents heart block. The PR interval reflects impulse conduction from the atria to the ventricles is normal. A long PR interval indicates a slowing of conduction between the atria and ventricles, usually due to slow conduction through the atrioventricular node (AV node). This is known as first degree heart block.
Extra QRS complexes represents abnormal pacemaker conductivity.
Answer:
right answer is option no c cardiology
Answer: B. Sarcoplasmic reticulum
Explanation: The sarcoplasmic reticulum is the name given to the organelle in the muscle cell, in charge of the storage and regulation of the intracellular calcium levels. It is the smooth endoplasmic reticulum in muscle cells, it means that it does not have ribosomes in its surface.
Option A. Incorrect. A SARCOMERE is the functional and anatomic unit of the striated muscle (skeletal muscle and heart muscle). This word comes from the greek: <em>sarkos (meat), meros (part). </em>That is reason you could find other structures of the muscle cell with this root (SARCO...).
Option C. Incorrect. "Arcolemma" this word does not exist. But if it refers to SARCOLEMMA, this word means: <em>sarko (meat), lema (cortex) </em>in greek<em>. </em>It is the plasma membrane of the muscle cells.
Option D. Incorrect. The SARCOPLASM, comes from the greek: <em>sarko (meat), plasm (matter). </em>This structure is the citoplasm of the muscle cells.
In conclusion, the word SARCOPLASMIC RETICULUM, refers to a <em>structure of the muscle cell, </em>that in this case, is the RETICULUM or the SMOOTH ER.