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Tamiku [17]
3 years ago
13

Using the key choices, identify each type of cartilage described (in terms of its body location or function) below.

Biology
1 answer:
Umnica [9.8K]3 years ago
6 0

Answer:

elastic 1. supports the external ear

fibrocartilage 2. between the vertebrae

hyaline 3. forms the walls of the voice box (larynx)

elastic 4. the epiglottis

hyaline 5. articular cartilages

fibrocartilage 6. meniscus in a knee joint

hyaline 7. connects the ribs to the sternum

fibrocartilage 8. most effective at resisting compression

elastic 9. most springy and flexible

hyaline 10. most abundant

Explanation:

Cartilage is a type of <u>connective tissue</u> that is characterized by being avascular and very flexible. There are three types of cartilages that can be differentiated by their histological properties, their function and their specific location in the body.

Hyaline cartilage is the most abundant and can be commonly found in articulations.

Fibrocartilage presents a mix of cartilage tissue and collagen fibers, making it tougher than the other types.

Elastic cartilage is much more flexible because it has elastic fibers and is found in places where this flexibility is needed (like the epiglottis).

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The p53 gene is important to the cell cycle in G1 and G2, and cancer. What happens to the cell cycle when a mutation occurs in t
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Answer:

PFFT this might help? sorry if not mate

Explanation:

Cell cycle checkpoint controls play a major role in preventing the development of cancer [see Sherr, 1994, for a more detailed discussion]. Major checkpoints occur at the G1 to S phase transition and at the G2 to M phase transitions. Cancer is a genetic disease that arises from defects in growth-promoting oncogenes and growth-suppressing tumor suppressor genes. The p53 tumor suppressor protein plays a role in both the G1/S phase and G2/M phase checkpoints. The mechanism for this activity at the G1/S phase checkpoint is well understood, but its mechanism of action at the G2/M phase checkpoint remains to be elucidated. The p53 protein is thought to prevent chromosomal replication specifically during the cell cycle if DNA damage is present. In addition, p53 can induce a type of programmed cell death, or apoptosis, under certain circumstances. The general goal of p53 appears to be the prevention of cell propagation if mutations are present. The p53 protein acts as a transcription factor by binding to certain specific genes and regulating their expression. One of these, WAF1 or Cip1, is activated by p53 and is an essential downstream mediator of p53-dependent G1/S phase checkpoint control. The function of p53 can be suppressed by another gene, MDM2, which is overexpressed in certain tumorigenic mouse cells and binds to p53 protein, thus inhibiting its transcriptional activation function. Other cellular proteins have been found to bind to p53, but the significance of the associations is not completely understood in all cases. The large number of human cancers in which the p53 gene is altered makes this gene a good candidate for cancer screening approaches.

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Answer:

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Explanation:

After pyruvate is formed, it must either be converted to another molecule to enter the citric acid cycle and ultimately produce ATP by utilizing the electron-transport chain, or go through alternate pathways to produce NAD+. Identify the products formed in the pathway of pyruvate and indicate whether NADH H or NAD+ are produced under aerobic and anaerobic respiration.

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