DeShawn is studying homeostasis and circulation. To organize his findings, he constructs two models of the human heart, veins, a
nd arteries: one to represent a non-smoker, and one that includes attributes typically found in a smoker. By comparing the two models, which relationship
of cause and effect can DeShawn best explain?
A
Contractions of the heart move blood through the circulatory system.
B. Smoking causes changes to homeostasis throughout the body.
C. Smoking damages the function of the circulatory system.
D. Blood flows in one direction only through the circulatory system.
From the information given in the question, it is obvious that De-Shawn created two models of the heart in order to show the differences that exist between the heart of a smoker and that of a non smoker. Smoking is an addictive habit that has great negative effects not only on the circulatory system of smokers alone but also on the whole body system.
Smoking normally damages the functions of the circulatory system by destroying the lining of the arteries; this leads to accumulation of fatty deposits that narrow the width of the arteries. The narrow arteries will hinder blood from flowing normally and this can lead to different types of medical conditions such as stroke, heart attack, heart failure, coronary heart diseases, etc.
I think it's C. Because hibernation is usually for animals living in Continental climates. I basically just eliminated the other answers until I got that one. One example for animals living in cold climates burrowing are Arctic Foxes.
At the beginning of the follicular phase, the lining of the uterus (endometrium) is thick with fluids and nutrients designed to nourish an embryo. If no egg has been fertilized, estrogen and progesterone levels are low. As a result, the top layers of the endometrium are shed, and menstrual bleeding occurs.
