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Biology Test 4
study guide
127
Biology
Graduate
11/17/2025

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Term
which system is involved in food processing
Definition
digestive
Term
what is mechanical digestion
Definition
by mouth/mastication
Term
what does the body make to facilitate chemical digestion
Definition
enzymes
Term
mechanical digestion/amylase digests starch
Definition
digestion that occurs in the mouth
Term
the common passageway for food & air
Definition
pharynx
Term
keeps food out of the trachea
Definition
epiglottis
Term
opening in trachea/covered by epiglottis/closed by vocal cords
Definition
glottis
Term
tube leading from mouth to stomach
Definition
esophagus
Term
where are rugae found/what do they do
Definition
stomach/churns food
Term
3 regions of the small intestine
Definition
duodenum, jejunum, ileum
Term
4 regions of the colon
Definition
ascending, transverse, descending, sigmoid
Term
where is the appendix located
Definition
large intestine/lower right abdomen
Term
what does the appendix do
Definition
no function
Term
literal meaning of stomach
Definition
gastro
Term
literal meaning of small intestine
Definition
portal
Term
literal meaning of liver
Definition
hepar
Term
literal meaning of pancreas
Definition
flesh
Term
literal meaning of gall bladder
Definition
cysto
Term
where is the gastroesophageal valve located
Definition
esophagus to stomach
Term
where is the pyloric valve located
Definition
stomach to small intestine
Term
where is the ilocecal valve located
Definition
small intestine to large intestine
Term
what does amylase digest
Definition
starch
Term
what does protease digest
Definition
proteins
Term
what does sucrase digest
Definition
sucrose
Term
what does lactase digest
Definition
lactose
Term
what does maltase digest
Definition
maltose
Term
what does lipase digest
Definition
fats/lipids
Term
what does bile digest
Definition
fats
Term
how do sinuses benefit the body
Definition
reduces skull density
Term
how do cilia benefit the lungs
Definition
continuously clears mucus
Term
the bulbous structure at the top of the trachea
Definition
larynx
Term
branches of the trachea
Definition
bronchioles
Term
functional units where oxygen enters blood & carbon dioxide exits
Definition
alveoli
Term
which vein has oxygenated blood
Definition
pulmonary vein
Term
which artery has deoxygenated blood
Definition
pulmonary artery
Term
literal name for blood
Definition
hema
Term
system that secretes hormones/control/regulation
Definition
endocrine system
Term
what is the master gland
Definition
pituitary gland
Term
literal meaning of thyroid
Definition
shield
Term
gland attached to the brain
Definition
pituitary gland
Term
necessary for proper thyroid function
Definition
iodine
Term
affects blood calcium
Definition
parathyroid
Term
2 hormones secreted by the pancreas
Definition
insulin & glucagons
Term
affects glucose & mineral levels
Definition
adrenals
Term
2 hormones secreted by the adrenals
Definition
adrenaline & noradrenaline
Term
fluid that circulates throughout the body
Definition
lymph
Term
what does lymph do
Definition
collects waste
Term
how is lymph circulated
Definition
lymphatic vessels are squeezed by surrounding muscle movements
Term
where is the thymus gland
Definition
between the lungs
Term
what matures in the thymus gland
Definition
t-cells
Term
what 3 things compose the axial skeleton
Definition
skull, vertebral column, rib cage
Term
what 4 things compose the appendicular skeleton
Definition
arms, legs, pelvis, shoulder girdle
Term
3 categories of bones
Definition
flat, long, irregular
Term
which type of joint is freely movable
Definition
synovial joint
Term
3 regions of the integument
Definition
epidermis, dermis, hypodermis
Term
literal term for skin
Definition
derma
Term
is skeletal muscle type voluntary
Definition
yes
Term
is cardiac muscle type voluntary
Definition
no
Term
is smooth muscle type voluntary
Definition
no
Term
where is skeletal muscle located
Definition
bone
Term
where is cardiac muscle located
Definition
heart
Term
where is smooth muscle located
Definition
hollow organs
Term
2 divisions of the nervous system
Definition
central & peripheral
Term
2 organs of the central nervous system
Definition
brain & spinal cord
Term
network of nerves & blood vessels that come together in the body
Definition
plexus
Term
difference between gray matter & white matter
Definition

gray: neuron body cells

white: nerve fibers

Term
what are special senses
Definition
organs of the head
Term
what do rods detect
Definition
light
Term
what do cones detect
Definition
color
Term
outer layer of the eye that protects and helps it focus light
Definition
cornea
Term
the colored part of the eye that surrounds the pupil
Definition
iris
Term
outer part of the ear that collects sound waves
Definition
auricle
Term
what does otic refer to
Definition
located in the region of the ear
Term
what is olfaction
Definition
sense of smell
Term
3 regions of the ear
Definition
outer, middle, inner
Term
tastes sensed by the tongue
Definition
sweet, salty, bitter, sour
Term
what does renal mean
Definition
relating to the kidneys
Term
2 regions of the kidney
Definition
renal cortex & renal medulla
Term
filters blood & removes waste in the kidneys
Definition
nephrons
Term
tubes from kidney leading to the bladder
Definition
ureters
Term
what is mastication
Definition
chewing
Term
what is micturition
Definition
urinating
Term
when does conception occur
Definition
when a sperm fertilizes an egg
Term
why do humans not have polyspermy
Definition
due to a blocking system that ensures only 1 sperm fertilizes an egg
Term
literal meaning of zygote
Definition
fused together
Term
what are monozygotic twins
Definition
identical
Term
what are conjoined twins
Definition
joined at some point
Term
what are dizygotic twins
Definition
fraternal
Term
cells formed early in embryonic development
Definition
morula
Term
an outer layer folds inward to form a pocket or tube
Definition
invagination
Term
3 layers of the embryo
Definition
ectoderm, mesoderm, endoderm
Term
what is the gestation period
Definition
from conception to birth
Term
what are fontanels
Definition
soft spots on baby's head
Term
how long does the embryonic period last
Definition
3 months
Term
how long does the fetal period last
Definition
3-9 months
Term
what are windows for learning
Definition
childhood
Term
transitional period from childhood to adulthood
Definition
adolescence
Term
what are male secondary sex characteristics
Definition
body shape, voice, muscle
Term
what are female secondary sex characteristics
Definition
body hair growth, breast development
Term
factors for premature babies
Definition
multiple births, teen mothers, malnourishment
Term
a substance that lowers the surface tension of a liquid
Definition
surfactant
Term
treats certain cancers & reduces nausea
Definition
thalidomide
Term
treatment where eggs are surgically removed from woman's ovaries
Definition
in vitro
Term
requires 2 parent cells
Definition
sexual reproduction
Term
male & female gonads
Definition
testes & ovaries
Term
function of the testes
Definition
produces sperm & male hormones
Term
what is formed in the seminiferous tubules
Definition
spermatogenesis
Term
where are sperm formed
Definition
testicles
Term
where are sperm stored
Definition
epididymus
Term
why is the scrotum external
Definition
to keep the testicles at a slightly lower temperature than core body temperature
Term
what is the vas deferens
Definition
sperm tubes
Term
where does the vas deferens lead
Definition
urethra
Term
what is the function of the urethra
Definition
conduit for sperm
Term
3 accessory organs
Definition
seminal vesicles, prostate gland, bulbourethral glands
Term
what does the seminal vesicle do
Definition
regulates pH of sperm
Term
what does the prostate gland do
Definition
helps activate sperm
Term
4 contents of sperm
Definition
mucous, hormones, fructose, sperm
Term
2 regions of the ovary
Definition
cortex & medulla
Term
what is in a follicle
Definition
eggs at various stages of development
Term
what do follicle cells do
Definition
nourish the developing egg & produce hormones
Term
what do fallopian tubes do
Definition
transports eggs from the ovaries to the uterus
Term
2 other terms for fallopian tubes
Definition
oviduct & uterine tube
Term
what does the Graafian follicle contain
Definition
the mature egg
Term
3 parts of the uterus
Definition
endometrium, myometrium, epimetrium
Term
where are mammary glands located
Definition
on the chest wall of females & males
Term
why do humans have 2 mammary glands
Definition
evolutionary adaptation to feed 1 or 2 children at a time
Term
what is asexual reproduction
Definition
requires 1 parent cell
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