Some of the nerve endings in the skin are sensitive to changes in temperature. they are part of a negative feedback mechanism regulating body temperature. these nerve endings represent a(n) in the negative feedback mechanism.

Complete question:

Question: Some of the nerve endings in the skin are sensitive to changes in temperature. They are part of a negative feedback mechanism regulating body temperature. These nerve endings represent a(n) in the negative feedback mechanism.

a) effector

b) control center

c) homeostatic balance or "ideal" value

d) receptor

d) receptor

Explanation:

Receptors are the cells or the structures present in organisms that sense any change in internal or external conditions such as temperature, light intensity, pressure, touch, etc. The receptors are activated when they sense a particular change. These changes are called stimuli.

In the given example, nerve endings sense the changes in temperature. This means that they are serving as receptors for "temperature" stimulus. Change in temperature conditions would activate nerve endings which in turn would send the sensory information to a control center.

c: warm water flows from the western tropical pacific toward south america. that should be the right answer! hope it .

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation: