Answer:
In quiet breathing inspiration involves muscular contractions and expiration is passive.
Explanation:
Respiration process involves two different stages, inspiration - inhalation- and expiration - exhalation-.
During inspiration, the diaphragm <u>contracts</u> and goes down, while intercostal muscles also <u>contract</u> and go up. These actions enhance the size of the thoracic box and <u>reduce internal pressure</u>. As a result, air flows in and fills the lungs.
During expiration, the <u>diaphragm relaxes</u> and the volume of the thoracic box diminishes, which causes the <u>pressure inside to increase</u>. In consequence, the lungs contract and the air is expulsed outside.
Answer:
Starch: Carbohydrate
Polysaccharide: Carbohydrate
Cholesterol: Lipid
Phospholipid: Lipid
Glycerol: Lipid
Glycogen: Carbohydrate
Monosaccharide: Carbohydrate
Nucleotide: Nucleic Acid
Cellulose: Carbohydrate
RNA: Nucleic Acid
Amino Acid: Protein
Polypeptide chain: Protein
Enzyme: Protein
Glucose: Carbohydrate
Saturated Fat: Lipid
Unsaturated Fatty Acid: Lipid
DNA: Nucleic Acid
<em>(I am unsure for</em><em> </em><em>Polypeptide chain</em>, <em>Saturated Fat, and Unsaturated Fatty Acid)</em>
<em />
<u><em>Hope this helps!</em></u>
<em>If you don't mind, please mark brainlisit!</em>
<em>-Isa</em>
For air masses to form fronts, they must collide with each other. B.
Answer:
Sarcomere
Explanation:
The muscle fiber / myofibrils consist of 2 types of filaments - actin and myosin. The myosin filaments are thick filament whereas the actin filaments are the thin filament.
In addition to this, the muscles have A-band and I-bands. These bands give the muscles alternate light and dark colour band structure. In the A-band, myosin filaments are present, whereas in the I - band the actin filaments are found.
In I-band 2 Z-lines are located. The area between the Z-lines is called sarcomere. In this sarcomere region both actin and myosin filaments present.
When muscles get contracted the length of the sarcomere shorten. The actin and myosin filaments overlap in this area. A cross-bridge form between them, with the help of filamentous protein titin.
