Answer:
Here are some explanations from 0nline so if you want rewrite in your own words
hope this helps :))
blood glucose-
"The control of blood sugar (glucose) by insulin is a good example of a negative feedback mechanism. When blood sugar rises, receptors in the body sense a change. In turn, the control center (pancreas) secretes insulin into the blood effectively lowering blood sugar levels."
"If the blood glucose level is too low, the pancreas releases the hormone glucagon. This travels to the liver in the blood and causes the break-down of glycogen into glucose. The glucose enters the blood stream and glucose levels increase back to normal. This is an example of negative feedback."
body temperature-
" Body temperature is regulated by negative feedback. The stimulus is when the body temperature exceeds 37 degrees Celsius, the sensors are the nerve cells with endings in the skin and brain, the control is the temperature regulatory center in the brain, and the effector is the sweat glands throughout the body."
"Body temperature is controlled by the hypothalamus in the brain. If the hypothalamus detects that the body is too hot, the response is that the body begins to sweat to try and reduce the temperature back to the correct level."
"Negative feedback (or balancing feedback) occurs when some function of the output of a system, process, or mechanism is fed back in a manner that tends to reduce the fluctuations in the output, whether caused by changes in the input or by other disturbances."
"Negative feedback brings a system back to its level of normal functioning. Adjustments of blood pressure, metabolism, and body temperature are all negative feedback"
The correct answer is D) Altered ecosystems
Answer:
D) altered ecosystems
Explanation:
just took the quiz
To determine how far the radio waves traveled in space in meters, we can use the fact that radio waves travel at the speed of light.
The speed of light is approximately 299,792,458 meters per second.
Given that the radio waves traveled for 15 minutes, we need to convert minutes to seconds. There are 60 seconds in a minute.
So, the total time the radio waves traveled is 15 minutes x 60 seconds/minute = 900 seconds.
To find the distance traveled, we can multiply the speed of light by the time:
299,792,458 meters/second x 900 seconds = 269,813,212,200 meters.
Therefore, the radio waves traveled approximately 269,813,212,200 meters into space.
B. Cytotoxic T cells bind to infected body cells and destroy them
C. Helper T cells activate cytotoxic T cells
D. A macrophage consumes a virus and displays antigens on its surface and signals helper T cells to divide.