2020A&P Quiz 1 Chapter 5 Integumentary System Study Set

As cells are pushed from the deeper portion of the epidermis toward the surface they A) are replaced by dividing cells from below. B) improve the supply of nutrients. C) tend to thrive. D) become dermal cells.

A) are replaced by dividing cells from below.

Vitamin D synthesis A) begins in skin that is exposed to sunlight. B) occurs exclusively in the skin. C) does not require sunlight. D) begins with the precursor, melanin.

A) begins in skin that is exposed to sunlight.

By reducing body temperature during hot weather skin helps to maintain A) body homeostasis. B) body structure. C) blood volume. D) brain activity.

A) body homeostasis.

The sloughing off of older cells occurs in the stratum A) corneum. B) basale. C) spinosum. D) granulosum.

A) corneum.

By covering the whole body surface skin acts as a protective barrier and plays a role in A) excretion B) immunity C) circulation D) respiration

A) excretion

Exposure to ultraviolet light causes the skin to darken by stimulating the production of A) melanin. B) carotene. C) hemoglobin. D) cyanin.

A) melanin.

An increase in body temperature causes A) sweating. B) arterioles in the dermis to constrict. C) arrector pili muscles to contract. D) an increase in keratinization of the skin.

A) sweating.

Adipose tissue in the hypodermis A) varies in amount from one region to other body regions B) helps to lower body temperature C) provides protection against infection D) is a double layer in infants

A) varies in amount from one region to other body regions

In cold weather _______ may result from reduced blood circulation through the skin. A) jaundice B) hypothermia C) hemangioma D) cyanosis

D) cyanosis

Goose-bumps on the skin are due to the contraction of the muscle called A) triceps. B) arrector pili muscle. C) intramuscular. D) biceps.

B) arrector pili muscle.

Due to the constriction of dermal blood vessels A) the blood vessels become dilated. B) body heat is conserved. C) more blood enters into the heart. D) body temperature tends to drop in that area.

B) body heat is conserved.

The outer, epithelial layer of the skin is called the A) dermis. B) epidermis. C) hypodermis. D) mesodermis.

B) epidermis.

Which of the following will help cool the body? A) absorption of ultraviolet light rays by the skin B) evaporation of sweat from the skin's surface C) contraction of the arrector pili muscles D) decreased blood flow to the skin

B) evaporation of sweat from the skin's surface

The outer layers of the epithelium harden due to deposition of a waterproof protein called A) actin B) keratin C) melanin D) adipose

B) keratin

Which of the following is true concerning light and dark-skinned races? A) Light-skinned people have fewer melanocytes than dark skinned people. B) Melanin production in light-skinned people is greater than in dark-skinned people. C) Dark-skinned people have the same number of melanocytes as light-skinned people but there is greater melanin production in dark skinned-people. D) None of the above.

C) Dark-skinned people have the same number of melanocytes as light-skinned people but there is greater melanin production in dark skinned-people.

An abrasion of the skin results in which of the following? A) fluid retention by the kidneys B) increased melanin production C) a possible site of entry for microorganisms D) loss of cell regeneration ability

C) a possible site of entry for microorganisms

What determines the color of skin? A) number of keratinocytes in the epidermis B) thickness of the epidermis layer of skin C) amount of melanin produced by melanocytes in the skin D) amount of carbon dioxide present in the body

C) amount of melanin produced by melanocytes in the skin

Light-skinned races such as Caucasians have A) more melanocytes than races with darker skin. B) fewer melanocytes than races with darker skin. C) approximately the same number of melanocytes as races with darker skin. D) no melanocytes.

C) approximately the same number of melanocytes as races with darker skin.

The integumentary system has many functions, one of which is the A) protection from all forms of cancer. B) production of Vitamin E. C) detection of hot and cold stimuli. D) regulation of acid-base balance in the blood.

C) detection of hot and cold stimuli.

Skin does not include the A) epidermis. B) papillary layer. C) hypodermis. D) dermis.

C) hypodermis.

The dermis A) contains no blood vessels. B) functions as padding and insulation. C) is responsible for most of the skin's structural strength. D) is divided into three distinct layers.

C) is responsible for most of the skin's structural strength.

Receptors in the skin can detect A) pain, cold, and light. B) sound, pressure, and heat. C) pressure, cold, and heat. D) odors, pain, and heat.

C) pressure, cold, and heat.

The ways in which the skin promotes loss of excess body heat are A) dilation of dermal blood vessels. B) activation of eccrine sweat glands to release more sweat to skin surface. C) loss of heat by evaporation of sweat. D) All of the above processes occur to reduce body heat.

D) All of the above processes occur to reduce body heat.

Melanin production can be influenced by A) genetics. B) exposure to sunlight. C) pregnancy. D) All of the above.

D) All of the above.

The layer of epidermis that undergoes mitosis and forms new epidermal cells is the stratum ________ . A) basale B) granulosum C) lucidum D) corneum

D) All of the above.

Which of the following groups of people are more likely to get skin cancer as they become older? A) Those who have been frequently over-exposed to the sun. B) Fair skinned blonds and redheads. C) Those who have a pre-existing mole. D) All of the above.

D) All of the above.

The integumentary system has many functions, one of which is A) protection from water loss. B) production of Vitamin E. C) detection of painful stimuli. D) Both A and C.

D) Both A and C.

When the arrector pili muscle contracts, which of the following happens? A) The hair shaft is pulled closer to the skin B) The hair shaft is pulled perpendicular to the skin surface. C) Movement of the hair follicle causes "goose bumps". D) Both B and C.

D) Both B and C.

Epidermis is characterized by being _______, whereas dermis is distinguished by being _______. A) the innermost layer of the skin; under the epidermis B) composed largely of connective tissue; composed of stratified squamous epithelial tissue C) the outermost layer of the skin; composed of stratified squamous epithelial tissue D) composed of stratified epithelial tissue; composed of connective tissue

D) composed of stratified epithelial tissue; composed of connective tissue

Which of the following functions is associated with the skin? A) production of fat. B) production of vitamin C. C) regulation of body pH. D) protection against ultraviolet radiation of the sun.

D) protection against ultraviolet radiation of the sun.

The most superficial layer of the epidermis is the A) stratum basale. B) stratum lucidum. C) stratum granulosum. D) stratum corneum.

D) stratum corneum.