Place each statement in the proper category to distinguish whether it is referri
ID: 30620 • Letter: P
Question
Place each statement in the proper category to distinguish whether it is referring to positive or negative feedback.
a) stretching the cervix indirectly causes the uterus to contract with more force, causing greater stretch of the cervix.
b) Platelets in the blood adhere to a recent cut in the skin and release chemicals, which cause additional platelets to adhere to the wound.
c) Good grades in school produces compliments and family pressure to continue this success, resulting in greater levels of academic success.
d) Decreasing blood pressure indirectly causes widespread vasoconstriction, resulting in a rise in blood pressure.
e) Decreasing levels of blood calcium cause parathyroid, hormone to be released, resulting in the increase of blood calcium levels
f) This feedback produces a rapid "climatic event"
g) This feedback is an increasing, amplifying, or magnifying process
h) This feedback negates or reverses a trend
Explanation / Answer
a)Negative feedback
The original pear shape of the uterus is maintained during the first few weeks of pregnancy. But as pregnancy progresses, both the corpus and fundus assume a globular form, becoming spherical by the end of the 151 trimester. Beginning in the P d trimester, the uterus increases in length more rapidly than width, and assumes an ovoid shape. 4
Pregnancy transforms the uterus into a relatively thin-walled muscular organ to accommodate the fetus, placenta and amniotic fluid. 4 Until recently, knowledge of these morphologic changes was based on surgical and pathologic observations. It is often stated that during early pregnancy, the uterine wall loses firmness; at term it is soft and readily depressible to accommodate fetal growth and movements
b)Negative feedback
There is chance of infection by the adherence of platelets near the wound.
c)Positive feedback
Good grades in school creates a positive feedback, as the academic level increased and it proved that students are attentive in studying.
d)Positive feedback
e)Positive feedback
f)Positive feedback
f)Negative feedback
g)positive feedback