BIOD 151 Module 1 ,2,3,4,5,6Exam Review Answer Key
(Portage learning)UPDATED 2022
components of integumentary system (3) - ANSWER: skin
hair
nails
largest organ in the body - ANSWER: skin
layers of skin - ANSWER: epidermis
dermis
hypodermis
outer layer of skin - ANSWER: epidermis
middle layer of skin - ANSWER: dermis
inner layer of skin - ANSWER: hypodermis
functions of skin (3) - ANSWER: 1. protection from pathogens
2. production of vitamin D
3. contain sense organs for protection of skin and underlying tissue
merkel cells & meissner's corpuscles - ANSWER: mechanorecptors
mechanorecptor fucntion - ANSWER: detect mechanical sensory information in form
of light touch and vibration
where can merkel cells found? - ANSWER: epidermis
nociceptors function - ANSWER: detect pain such as pain from prick
where are nociceptors found? - ANSWER: embedded throughout the nerves
pacinian corpuscles function - ANSWER: detect mechanical sensory information of
pressure applied to skin
thermoceptors function - ANSWER: detect hot and cold
sensory organs function - ANSWER: designed to detect sensory information and relay
information to brain
true or false: thermoreceptors detect fine touch - ANSWER: false
, true or false: merkel's cells and meisner's corpuscles are thermoceptors - ANSWER:
false
true or false: pacinian corpuscles detect pressure - ANSWER: true
what does an exocrine gland contain and how do its contents reach the surface of
the skin - ANSWER: -contains secretions
-released through duct into an epithelial surface or lining
Sebaceous glands - ANSWER: -oil glands
-produce sebum
sebum definition - ANSWER: helps keep skin and hair from drying out and cracking
and inhibits growth of harmful microbes
Sweat glands are also called ______ - ANSWER: sudoriferous glands
sweat glands - ANSWER: -Produce sweat in almost every part of the skin
-perspiration
thermoregulation - ANSWER: helps body to regulate its temperature
-perspiration is one method
what type of cells make up the epithelium? - ANSWER: stratified squamous
stratified squamous epithelium - ANSWER: layers of flat cells
is the epidermis vascular or avascular? - ANSWER: avascular
receives nutrients from basement membrane
4 distinct layers of epidermis (superficial to deep) - ANSWER: 1. stratum corneum
2. stratum granulosum
3. stratum spinosum
4. stratum basale
how long do dead cells remain in the stratum corneum before they slough off? -
ANSWER: ~2 weeks
true or false: cells of the stratum basale have a high rate of cell division - ANSWER:
true
epidermal ridges - ANSWER: -unique to each person and consistent throughout a
person's lifetime
-finger prints
cells found in epidermis (5) - ANSWER: 1. keratinocytes
(Portage learning)UPDATED 2022
components of integumentary system (3) - ANSWER: skin
hair
nails
largest organ in the body - ANSWER: skin
layers of skin - ANSWER: epidermis
dermis
hypodermis
outer layer of skin - ANSWER: epidermis
middle layer of skin - ANSWER: dermis
inner layer of skin - ANSWER: hypodermis
functions of skin (3) - ANSWER: 1. protection from pathogens
2. production of vitamin D
3. contain sense organs for protection of skin and underlying tissue
merkel cells & meissner's corpuscles - ANSWER: mechanorecptors
mechanorecptor fucntion - ANSWER: detect mechanical sensory information in form
of light touch and vibration
where can merkel cells found? - ANSWER: epidermis
nociceptors function - ANSWER: detect pain such as pain from prick
where are nociceptors found? - ANSWER: embedded throughout the nerves
pacinian corpuscles function - ANSWER: detect mechanical sensory information of
pressure applied to skin
thermoceptors function - ANSWER: detect hot and cold
sensory organs function - ANSWER: designed to detect sensory information and relay
information to brain
true or false: thermoreceptors detect fine touch - ANSWER: false
, true or false: merkel's cells and meisner's corpuscles are thermoceptors - ANSWER:
false
true or false: pacinian corpuscles detect pressure - ANSWER: true
what does an exocrine gland contain and how do its contents reach the surface of
the skin - ANSWER: -contains secretions
-released through duct into an epithelial surface or lining
Sebaceous glands - ANSWER: -oil glands
-produce sebum
sebum definition - ANSWER: helps keep skin and hair from drying out and cracking
and inhibits growth of harmful microbes
Sweat glands are also called ______ - ANSWER: sudoriferous glands
sweat glands - ANSWER: -Produce sweat in almost every part of the skin
-perspiration
thermoregulation - ANSWER: helps body to regulate its temperature
-perspiration is one method
what type of cells make up the epithelium? - ANSWER: stratified squamous
stratified squamous epithelium - ANSWER: layers of flat cells
is the epidermis vascular or avascular? - ANSWER: avascular
receives nutrients from basement membrane
4 distinct layers of epidermis (superficial to deep) - ANSWER: 1. stratum corneum
2. stratum granulosum
3. stratum spinosum
4. stratum basale
how long do dead cells remain in the stratum corneum before they slough off? -
ANSWER: ~2 weeks
true or false: cells of the stratum basale have a high rate of cell division - ANSWER:
true
epidermal ridges - ANSWER: -unique to each person and consistent throughout a
person's lifetime
-finger prints
cells found in epidermis (5) - ANSWER: 1. keratinocytes
