Answer:
B. Serotonin is a biogenic amine but not a catecholamine.
Explanation:
Catecholamines are the molecules which have an aminolaterral chain with a chatecol and an amino group on their structure. Also, catecholamines are derived from an aminoacid called tyrosine. Instead, Serotonin is derived from an aminoacid called tryptophan and its structure does not contain the chemical compounds to be a catecholamine.
Answer:
1. Trachea
2. Main bronchi
3. Lobar bronchi
4. Segmental bronchi
5. Smaller bronchi
6. Bronchioles
7. Respiratory bronchioles
8. Terminal bronchioles
9. Alveolar ducts
10. Alveoli
Explanation:
The bronchial tree begins with the trachea and branches into smaller ducts that eventually lead the air to the alveoli, where oxygen performs the gas exchange with carbon dioxide from deoxygenated blood.
The trachea branches into the main bronchi, each one branches into the lobar bronchi (the bronchi that enters into the lungs) in the left lobe we found two lobar bronchi and in the right lobe three lobar bronchi, each lobar bronchi divides further into segmental bronchi, which branches into smaller bronchi, these branch more and more into small conducts named bronchioles until they reach the alveoli (tiny air bags at the end of the terminal bronchioles that are in contact with the capillaries for gas exchange)
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Answer:
The correct answer is B. Proximal
Explanation:
Tooth have five surfaces distal, facial, Incisal, Lingual and mesial. Mesial surface is the tooth surface which is present towards the front portion and lingual surface towards back portion of mouth.
So the area where mesial surface of one tooth touches the lingual surface of another tooth is called proximal surface. There is a point where the two teeth that are adjacent touches each other called contact point of proximal surface. It becomes wider due to chewing and grinding with time.
Answer:
drape a sheet over the body
Explanation:
