Asked by Emily Thayer on Jul 31, 2024
Verified
What is/are the stimulus(-i) for contraction of the arrector pili muscles?
A) Low blood pH
B) Dry skin
C) Cold temperature or fear
D) Hot temperature
E) Hot temperature or fear
Arrector Pili
Small muscles attached to hair follicles in mammals, contraction of which causes the hair to stand on end.
Blood Ph
The measure of acidity or alkalinity of the blood, which is tightly regulated around a value of 7.4.
- Recognize the mechanisms of thermoregulation and the integumentary system's role in maintaining body temperature.
- Detail the configuration and expansion of hair and nails, including the basis of their physiology.
Verified Answer
NW
Nicole WilliamsAug 06, 2024
Final Answer :
C
Explanation :
The stimulus for contraction of arrector pili muscles is cold temperature or fear, which leads to the hair standing up or "goosebumps". Dry skin, low blood pH, and hot temperature are not known to directly stimulate the arrector pili muscles. Option E includes hot temperature, which is contradicted by the statement above. Therefore, only option C is the best choice.
Learning Objectives
- Recognize the mechanisms of thermoregulation and the integumentary system's role in maintaining body temperature.
- Detail the configuration and expansion of hair and nails, including the basis of their physiology.