/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 1 What muscles, in the dermis are ... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 10: Problem 1

What muscles, in the dermis are responsible for erecting hair follicles? (0.5 points)

Short Answer

Expert verified
The arrector pili muscles are responsible for erecting hair follicles in the dermis.

Step by step solution

01

- Understanding the Skin Structure

Start by understanding that the skin has multiple layers. The outermost layer is the epidermis, followed by the dermis beneath it.
02

- Identify Layers of the Dermis

The dermis, which is located under the epidermis, contains various structures such as blood vessels, nerves, hair follicles, and muscles.
03

- Focus on Hair Follicles

Hair follicles are embedded in the dermis. Each hair follicle is associated with a small muscle that can contract.
04

- Identify the Muscle Responsible

The specific muscles responsible for causing hair to stand erect are called the arrector pili muscles. These are small, smooth muscles connected to hair follicles.
05

- Arrive at the Final Answer

The arrector pili muscles, when contracted, cause the hair follicles to erect, leading to what is commonly known as 'goosebumps.'

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Skin Structure
The skin is composed of multiple layers, each playing a unique role in protecting and supporting the body. The outermost layer is called the epidermis. It acts as a barrier against the environment. Beneath the epidermis lies the dermis. This layer contains many essential structures, including blood vessels, nerves, hair follicles, and muscles. The dermis supports the epidermis and provides nutrients to it, while also housing the structures necessary for sensation and temperature regulation.
Dermis Layers
The dermis has two main layers: the papillary layer and the reticular layer. The papillary layer is closer to the epidermis and is composed of loose connective tissue. It contains small blood vessels and provides nutrients to the epidermis. The reticular layer is thicker and made up of dense connective tissue. This layer contains larger blood vessels, nerves, and hair follicles. The reticular layer provides strength and elasticity to the skin, thanks to its collagen and elastin fibers.
Hair Follicles
Hair follicles are small organs located in the dermis. They produce hair and have a crucial role in skin health. Each hair follicle consists of a hair bulb, where cells divide and produce hair, a hair root, and a hair shaft that extends above the skin surface. Surrounding each follicle are various structures, including sebaceous (oil) glands that keep the hair and skin moisturized and small muscles known as arrector pili muscles.
Muscle Contraction
The arrector pili muscles are tiny, smooth muscles attached to each hair follicle. When these muscles contract, they pull the hair follicle upright, causing the hair to stand on end鈥攁 phenomenon known as 'goosebumps.' This contraction is often a response to cold or emotional states like fear. Smooth muscles, like the arrector pili, operate involuntarily, meaning we cannot consciously control their contractions. Their primary function is to help with thermoregulation and to provide a layer of insulation by trapping air close to the skin.

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

What is the primary muscle used for normal breathing? Which additional muscles are utilized to increase inspiration and expiration during strenuous exercise? ( 0.5 points)
See all solutions

Recommended explanations on Biology Textbooks

Microbiology

Read Explanation

Genetic Information

Read Explanation

Control of Gene Expression

Read Explanation

Biological Molecules

Read Explanation

Cell Communication

Read Explanation

Biological Organisms

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.