This topic contains a solution. Click here to go to the answer

Author Question: What is the term used to identify a pattern of bone destruction indicative of an aggressive ... (Read 58 times)

Jkov05

  • Hero Member
  • *****
  • Posts: 556
What is the term used to identify a pattern of bone destruction indicative of an aggressive ma-lignant tumor? (select all that apply)
 
  a. Moth-eaten
  b. Permeative
  c. Geographic
  d. Radial
  e. Selective

Question 2

During which stage of muscle contraction does actin bind to myosin?
 
  a. Coupling
  b. Relaxation
  c. Discharging
  d. Excitation



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

coyin

  • Sr. Member
  • ****
  • Posts: 334
Answer to Question 1

ANS: A, B, C
Three patterns of bone destruction by bone tumors have been identified: (1) the geographic pat-tern, (2) the moth-eaten pattern, and (3) the permeative pattern. Radial and selective are not con-sidered patterns of malignancy.

Answer to Question 2

ANS: A
During coupling, depolarization of the transverse tubules occurs. This triggers the release of cal-cium ions from the sarcoplasmic reticulum, exposing binding sites on the actin molecule. In the presence of calcium, actin is free to bind with myosin. Relaxation is the last step. It begins as cal-cium ions are actively transported back into the sarcoplasmic reticulum, removing ions from in-teraction with troponin. Discharging is not a step in the process.
Excitation is the first step of muscle contraction and it begins with the spread of an action poten-tial from the nerve terminal to the neuromuscular junction.




Jkov05

  • Member
  • Posts: 556
Reply 2 on: Jun 25, 2018
Thanks for the timely response, appreciate it


cpetit11

  • Member
  • Posts: 321
Reply 3 on: Yesterday
Gracias!

 

Did you know?

According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.

Did you know?

Over time, chronic hepatitis B virus and hepatitis C virus infections can progress to advanced liver disease, liver failure, and hepatocellular carcinoma. Unlike other forms, more than 80% of hepatitis C infections become chronic and lead to liver disease. When combined with hepatitis B, hepatitis C now accounts for 75% percent of all cases of liver disease around the world. Liver failure caused by hepatitis C is now leading cause of liver transplants in the United States.

Did you know?

The average older adult in the United States takes five prescription drugs per day. Half of these drugs contain a sedative. Alcohol should therefore be avoided by most senior citizens because of the dangerous interactions between alcohol and sedatives.

Did you know?

People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.

Did you know?

More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.

For a complete list of videos, visit our video library