Match each chronic disease with one of its risk factors. A. Asthma Lack of physical activity B. Obesity Poor air quality C. Brea

Answer:

The respiratory system is comprised of specialized organs and structures for gas exchange in both animals and plants. The structure and function of this system differ significantly based on the organism's size, habitat, and evolutionary background. In terrestrial animals, the respiratory surfaces are typically the linings of the lungs. In mammals and reptiles, gas exchange occurs within millions of tiny air sacs known as alveoli, while birds have atria for this process. These tiny air sacs boast an extensive blood supply, ensuring air comes into close proximity with the bloodstream. They connect to the outer environment through airways or hollow tubes, with the trachea being the largest that divides in the chest into two primary bronchi. These then branch further into successively narrower secondary and tertiary bronchi, eventually leading to numerous smaller tubes called bronchioles. In birds, these are referred to as parabronchi. The air needs to be drawn into the alveoli or atria from the outside through the act of breathing, which involves respiratory muscles.

Explanation:

Answer:

Earth qualifies as an inner planet.

Earth has a greater density compared to Jupiter.

Jupiter is predominantly gaseous.

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Answer:

Sister chromatids are identical copies of chromatids from chromosomes. They are typically produced through the semi-conservative replication of a single chromosome's DNA. Thus, they can be viewed as'photocopies' of the original parental chromosomes, linked together at the centromere.

They are entirely identical in every aspect, sharing the same genes and allele configurations.

Still, minor variations can occur between the identical sister chromatids due tomutations fromerrors during replication, and differences can also arise in the lengths of telomere repeats.

Non-sister chromatids differ as they arise from separate haploid sex cells during fertilization. These chromatids come from distinct parents and possess different genetic compositions since they do not lie on the same homologous chromosomes. This is why crossing-over results in genetic variation.

However, they may still exhibit genetic similarities if they are part of homologous chromosomes. This is because Synapsis of the bivalents in these chromosomes permits the exchange of genetic material through crossing-over between non-sister chromatids, thereby sharing identical genetic traits.

Explanation:

Fluorine, iodine, and bromine belong to the same group. As the first element, fluorine has fewer electron orbitals than bromine and iodine. The presence of D orbitals in bromine and iodine enables these elements to form bonds in various ways; however, fluorine's lack of D orbitals restricts its ability to form ions.<span />

Explanation:

Isabella: 50-meter freestyle - limited oxygen supply over a brief duration

• anaerobic cellular metabolism
• partial breakdown of glucose results in: lactic acid
• yields 2 ATP molecules per gram of glucose

Tyler: half marathon- sufficient oxygen supply to tissues over an extended period

• aerobic cellular metabolism
• full glucose breakdown
• yields 36 ATP molecules per gram of glucose
• waste products: H2O, CO2

Further Explanation:

in summary: C6H12O6 (glucose) + 6 O2 → 6 CO2 + 6 H2O + ≈38 ATP

Mitochondria, which are small membrane-bound organelles in all eukaryotic cells, generate most of the chemical energy necessary for cellular biochemical processes. This energy is stored as ATP, which is synthesized in the mitochondria. ATP production through respiration in the mitochondria involves oxygen in the Krebs’ or Citric acid cycle, utilizing pyruvate oxidation (which occurs through glycolysis in the cytoplasm).

Oxidative phosphorylation refers to a mechanism where the NADH and FADH2 produced earlier in the respiration process donate electrons to the electron transport chain, reverting to their original forms, NADH+ and FAD. The flow of electrons through the chain releases energy that is utilized to pump protons out of the mitochondrial matrix.

This creates a gradient with a varying number of protons on each side of the membrane, allowing protons to flow back into the matrix via the ATP synthase enzyme, converting ADP into ATP. At the electron transport chain's conclusion, three oxygen molecules accept electrons and protons, culminating in water formation...

• Glycolysis happens in the cytoplasm, using 2 ATP to split glucose into 2 pyruvates, yielding 4 ATP and 2 NADH molecules (resulting in a net ATP gain of 2)
• The Citric acid or Krab cycle occurs in the mitochondrial matrix, producing 6 CO2 by combining oxygen with carbon from pyruvate, along with 2 ATP, 8 NADH, and 2 FADH2.
• The electron transport chain operates at the inner mitochondrial membrane, generating 34 ATP, with electrons merging with H+ derived from 10 NADH and 4 FADH2, replenishing electron acceptors and 3 oxygens to yield 6 H2O, 10 NAD+, and 4 FAD.

In specific cellular conditions, aerobic respiration may be impeded due to various reasons:

• - absence of inorganic final electron acceptors
• - incomplete or non-existent electron transport system
• - lack of necessary genes for enzymes in the Kreb's cycle

Consequently, cells resort to alternative methods for ATP energy production and to regenerate NAD+, an oxidized form of NADH that serves as the primary electron carrier during glycolysis. Pyruvate, generated in the cytoplasm through glycolysis, also acts as an electron acceptor in the fermentation process.

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