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:patient complains of pain, swelling, tenderness on the small joints like hands and feet.. Also early morning joint stiffness that last for long hours..
Explanation: Rheumatoid arthritis is a chronic inflammatory condition of joints.. It affects small joints mostly.. The body system attacks the joints. There is usually a positive history of autoimmune diseases.
Answer:
C. Oxygen and Carbon dioxide
Explanation:
Hemoglobin helps to transport oxygen from lungs to cells and carbon dioxide from cells to lungs. However, it's not the only way to transport these gases.
Each hemoglobin contain four subunits and binds four oxygen molecules and RBC turn into bright red. Carbon dioxide attached to hemoglobin is called as carbaminohemoglobin , this binding is reversible and the carbon disassociates itself from hemoglobin in lungs to escape into the air via alveoli.
Answer:
Most practitioners wait until at least 6 weeks to perform a first pregnancy ultrasound. However, a gestational sac can be seen as early as 4 1/2 weeks after your last period, and a fetal heartbeat can be detected at 5 to 6 weeks (though it might not always be).
