BIOS 255 Comprehensive Exam Study Guide Already
Graded A
POSITIVE FEED BACK SYSTEM
A positive feedback mechanism is the exact opposite of a negative feedback
mechanism. With negative feedback, the output reduces the original effect of the
stimulus. In a positive feedback system, the output enhances the original stimulus. A
good example of a positive feedback system is child birth.
NEGATIVE FEEDBACK SYSTEM
A positive feedback mechanism is the exact opposite of a negative feedback
mechanism. With negative feedback, the output reduces the original effect of the
stimulus
POSITIVE FEEDBACK
A positive feedback mechanism is the exact opposite of a negative feedback
mechanism. With negative feedback, the output reduces the original effect of the
stimulus
blood vessels (veins, arteries, capillaries) and lymph vessels, muscle tissue.
What tissue is vascular
Epithelial tissue
What tissue is avascular
Loose connective tissue, endothelium
What epithelial tissue is vascular
Cell polarity is characterised by differences in structure, composition and
function between at least two poles of a cell. In epithelial cells, these spatial
differences allow for the formation of defined apical and basal
membranes.???????
Why is epithelial tissue described as polar
collagen fibers, reticular fibers, and elastin fibers
Describe three types of protein fibers in connective tissue
collagen fibers
What is thick strong, flexible, and resist stretch
Reticular fibers
, Fibers made of collagen fibers that are very thin and branched. Forma tightly woven
fabric that joins connective tissue to adjacent tissues.
Elastin Fibers
fibers made of the protein elastin that increase the elasticity of the dermis provides
strength and elasticity
chondroitin sulfate
Jelly-like substance in connective tissue that provides support and adhesiveness
Acts as a lubricant in skeletal joins by creating a gel-like medium that is resilient
to friction and shock.
extracellular matrix (ECM) of many connective tissues, including cartilage, bone,
skin, ligaments and tendons.
Where is chondroitin sulfate located in the body
provide a tough, protective barrier against mechanical stress, physical trauma,
and water loss. The keratin in the skin helps to make it more resistant to damage
from the environment, such as UV radiation, chemicals, and pathogens.
What is the function of keratin in the epidermis
Merocrine
thermoregulation by cooling the skin, increase friction on the palms of the hands,
and excrete waste products.
Subaceous
produce and secrete sebum,
Aprocrine glands
Found in the axilla, genital area, and pigmented area around the nipples. Secretion of
apocrine glands is similar to sweat, but more viscous. This secretion is depostited onto
the distal end of a hair root.
All over the body
Where is merocrine glands found
on or near your hair follicles in the second layer of your skin (dermis). You have
thousands of sebaceous glands all over your body. The only place where you
don't have sebaceous glands are on the palms of your hands and the soles of
your feet.
Where is sabaceous gland found
Graded A
POSITIVE FEED BACK SYSTEM
A positive feedback mechanism is the exact opposite of a negative feedback
mechanism. With negative feedback, the output reduces the original effect of the
stimulus. In a positive feedback system, the output enhances the original stimulus. A
good example of a positive feedback system is child birth.
NEGATIVE FEEDBACK SYSTEM
A positive feedback mechanism is the exact opposite of a negative feedback
mechanism. With negative feedback, the output reduces the original effect of the
stimulus
POSITIVE FEEDBACK
A positive feedback mechanism is the exact opposite of a negative feedback
mechanism. With negative feedback, the output reduces the original effect of the
stimulus
blood vessels (veins, arteries, capillaries) and lymph vessels, muscle tissue.
What tissue is vascular
Epithelial tissue
What tissue is avascular
Loose connective tissue, endothelium
What epithelial tissue is vascular
Cell polarity is characterised by differences in structure, composition and
function between at least two poles of a cell. In epithelial cells, these spatial
differences allow for the formation of defined apical and basal
membranes.???????
Why is epithelial tissue described as polar
collagen fibers, reticular fibers, and elastin fibers
Describe three types of protein fibers in connective tissue
collagen fibers
What is thick strong, flexible, and resist stretch
Reticular fibers
, Fibers made of collagen fibers that are very thin and branched. Forma tightly woven
fabric that joins connective tissue to adjacent tissues.
Elastin Fibers
fibers made of the protein elastin that increase the elasticity of the dermis provides
strength and elasticity
chondroitin sulfate
Jelly-like substance in connective tissue that provides support and adhesiveness
Acts as a lubricant in skeletal joins by creating a gel-like medium that is resilient
to friction and shock.
extracellular matrix (ECM) of many connective tissues, including cartilage, bone,
skin, ligaments and tendons.
Where is chondroitin sulfate located in the body
provide a tough, protective barrier against mechanical stress, physical trauma,
and water loss. The keratin in the skin helps to make it more resistant to damage
from the environment, such as UV radiation, chemicals, and pathogens.
What is the function of keratin in the epidermis
Merocrine
thermoregulation by cooling the skin, increase friction on the palms of the hands,
and excrete waste products.
Subaceous
produce and secrete sebum,
Aprocrine glands
Found in the axilla, genital area, and pigmented area around the nipples. Secretion of
apocrine glands is similar to sweat, but more viscous. This secretion is depostited onto
the distal end of a hair root.
All over the body
Where is merocrine glands found
on or near your hair follicles in the second layer of your skin (dermis). You have
thousands of sebaceous glands all over your body. The only place where you
don't have sebaceous glands are on the palms of your hands and the soles of
your feet.
Where is sabaceous gland found
