Answer:
Please see the answers below in bold type.
Explanation:
1. The scientific study of joints is called arthrology. From the Greek <em>Arthron</em>, joint or articulation. This science studies the anatomy and the function as well as the diseases and treatments associated with joints, such as arthritis.
2. The structural classification of joints divides all joints into three types: cartilaginous, synovial and fibrous. This depends on what tissue the joint is constituted by and on the presence or not of a cavity on one bone where the other one fits. In this case, the only exception is synarthrosis, which is one of the three types of joint (synarthrosis, diarthrosis and amphiarthrosis) in the functional classification of joints.
3. Slightly movable joints are classified as amphiarthrosis. This slight movement is the result of hyaline cartilage that connects the bones. An example is the ribs that are connected to the sternum. The cartilage allows the rib cage to move slightly, for example it expands somewhat when you inhale as you breathe.
4. A synarthrosis, from the Greek <em>syn</em> = together or joined, and <em>arthron</em> a joint, meaning a fused or immobile joint. The only immobile joint listed here is the gomphosis, as the skull suture in infants has cartilage which allows for some movement. A gomphosis is a peg-and-socket joint, and the only example is the tooth. The root of the tooth is the peg which is inserted into its socket.
Answer:
True!
Explanation:
Carbon monoxide is released from running cars and smoking tobacco. It is, in fact, toxic to humans.
Answer:5.5 mL
Explanation:I learned how to solve it in Chem.
Answer:
Okay
Explanation:
Human topoisomerase I plays an important role in removing positive DNA supercoils that accumulate ahead of replication forks. It also is the target for camptothecin-based anticancer drugs that act by increasing levels of topoisomerase I-mediated DNA scission. Evidence suggests that cleavage events most likely to generate permanent genomic damage are those that occur ahead of DNA tracking systems. Therefore, it is important to characterize the ability of topoisomerase I to cleave positively supercoiled DNA. Results confirm that the human enzyme maintains higher levels of cleavage with positively as opposed to negatively supercoiled substrates in the absence or presence of anticancer drugs. Enhanced drug efficacy on positively supercoiled DNA is due primarily to an increase in baseline levels of cleavage. Sites of topoisomerase I-mediated DNA cleavage do not appear to be affected by supercoil geometry. However, rates of ligation are slower with positively supercoiled substrates. Finally, intercalators enhance topoisomerase I-mediated cleavage of negatively supercoiled substrates but not positively supercoiled or linear DNA. We suggest that these compounds act by altering the perceived topological state of the double helix, making underwound DNA appear to be overwound to the enzyme, and propose that these compounds be referred to as ‘topological poisons of topoisomerase I’
Answer:
The blood volume of an average-sized adult human is approximately:
<em>b) 4-6 liters</em>
Explanation:
Blood volume is the total amount of fluids present in the circulatory system of a person. The normal blood volume in a person can variate according to the person's hydration, size, weight, and amount of blood components (blood cells, platelets, and plasma).
