Answer:
<u><em>Mitochondrion</em></u>
Explanation:
<em>The enzymatic reactions of cellular respiration begin in the cytoplasm, but most of the reactions occur in the mitochondria. Cellular respiration occurs in the double-membrane organelle called the mitochondrion. The folds in the inner membrane are called cristae.</em>
<u>Mucins</u> are water-soluble, complex glycoproteins that are secreted by goblet cells.
Explanation:
Goblet cells, named after their goblet-like shape, are usually found in the epithelium of respiratory and intestinal tracts in the body. Their main function is to produce mucus (primarily made up of mucins), a slippery combination of proteins, water and sugars, that serves three main functions:
- The barrier function: By trapping the unwanted/harmful particles that we inhale and preventing them from entering our system.
- The protection function: By keeping the hair-like cilia lubricated and moist to remove the harmful particles.
- The defence function: Mucus is made up of certain enzymes, antibodies and proteins that act as a defence mechanism for the body.
A unique property of mucins is their capability to form gels - sticky and viscous substances that work both as lubricants as well as defensive chemical barriers in the body.
Answer:
B
Explanation:
Water is very good at absorbing heat, making it incredibly unlikely that the heat from a volcanic explosion will spread thousands of miles.
The addition of lava into the ocean would not be significant enough to raise sea levels on the other side of the ocean without there being significantly larger problems (like the planet being cracked).
Volcanic eruptions do result in tectonic plate movement, but it is unlikely that an eruption thousands of miles away will trigger any noticeable change.
This leaves B, which describes the phenomenon believed to have killed the dinosaurs and to have caused major climate abnormalities in 1816. When large amounts of ash go into the atmosphere, they are spread by air currents in the same way a hurricane can travel from Africa to North America. The ash cloud would obscure the Sun, reducing the amount of solar radiation reaching the surface and thus decreasing temperatures.
Answer:
Explained.
Explanation:
When oxygen delivery becomes insufficient to support a runner's aerobic metabolism, cells switch to an emergency mode in which ATP is insufficiently produced and is lactic acid is produced as by product. Thus the runner finds difficult to remain competitive in the race because of lack energy.
To overcome this state the runner needs to increase his/her oxygen in take. This why it is advised to breath deeply.