Dermal Follicle
Dermal Follicle
Need help with a few questions for my school work?
Hair provides some insulation to the skin. When cold, the hairs stand up, increasing the thickness of the coat layer, and trapping more warm air near the skin. Which of the following is responsible for hair standing up?
A. Dermal papilla B. The arrector pili muscle C. Hair follicle cells
D. The cortex of the hair shaft
To investigate an animal with dyspnea, an instrument called a bronchoscope is passed down the trachea to visualize the airways. The first structure encountered is a site where the trachea divides into smaller airways. This site is called the tracheal
A. conchae. B. bifurcation C. carina. D. choana.
please help it will be appreciated
a & b ,
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