This figure shows an example of regulation of hormone secretion by a negative feedback loop. The large box labeled 1 represents the initial stimulus. Which could be the initial stimulus for this pattern of regulation?
A. Low blood sugar level
B. High WBC (white blood cell) count
C. High blood calcium level
D. Low body temperature
E. Low RBC (red blood cell) count
Answer: D
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The structure in the epidermis that allows humans to detect very light touch, especially in the finger tips is the ________.
What will be an ideal response?
The human ear is most sensitive to sound frequencies within the range of
a. 0-20,000 cycles per second b. 20-20,000 cycles per second c. 10-100,000 cycles per second d. 100-15,000 cycles per second e. 1,000-4,000 cycles per second
The T cells that limit the degree of immune system activation from a single stimulus are __________.
a. suppressor T cells b. memory Tc cells c. cytotoxic T cells d. CD4 T cells
Explain how the roles of the receptor and effector differ in the negative feedback mechanism to maintain homeostasis
What will be an ideal response?