Homeostasis

Question 1

2. Which of the following physiological responses is an example of a negative feedback response loop?
   a. An increase in the concentration of glucose in the blood stimulates the pancreas to secrete insulin, a hormone that lowers blood glucose concentration
   b. Stimulation of a nerve cell causes sodium ions to leak into the cell, and the sodium influx triggers the inward leaking of more sodium
   c. During childbirth, the baby’s head against the cervix causes an increase in plasma oxytocin concentration
   d. Blood clot formation
   e. Salivary glands activated at the sight of food

Answer 1

a. An increase in the concentration of glucose in the blood stimulates the pancreas to secrete insulin, a hormone that lowers blood glucose concentration

Question 2

4.	Initial stimulus into response into reduce stimulus into response loop shuts off is BEST 
described as \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ .
a.	Positive feedback 
b.	Homeostasis
c.	Negative feedback
d.	Feed forward control
e.	Feed backward control

Answer 2

c. Negative feedback

Question 3

Which of the following is not one of the seven life processes exhibited by
vertebrates?
a. Autotrophy
b. Excretion
c. Growth
d. Reproduction
e. Respiration

Answer 3

a. Autotrophy

Question 4

Which of the following BEST represents a homeostatic control?

a. Acclimation to low temperature
b. Ovulation
c. Salivation in response to the smell of food
d. The regulation of blood calcium concentration
e. Partuition

Answer 4

d. The regulation of blood calcium concentration

Question 5

Which of the following BEST represents positive feedback control?

a. Acclimation to low temperature
b. Body temperature regulation
c. Ovulation
d. Salivation in response to the smell of food
e. The regulation of blood calcium concentration

Answer 5

c. Ovulation