chapter 4 5 6 7 Flashcards
List, in order, the list of how life is organized from cell to organ systems
cells
tissue
organs
organ system
group of cells of a similar type that work together to serve a common function
tissues
covers body surfaces, lines body cavities and organs, and forms glands
epithelial
covers skin
epithelial
provides body and its organs with protection and support serves as storage site for fat; plays role in immunity
connective tissue
two types of connective tissue
connective tissue proper
specialized connective tissue
blood, bone, cartilage, adipose tissue
connective
responsible for body movement and movement of substances through the body
muscle
skeletal, cardiac, and smooth
muscle tissue
conducts nerve impulses from one part of the body to another
nervous tissue
brain, spinal cord, and nerves
nervous tissue
Indicate the most abundant and widely distributed type of tissue
connective tissue
3 basic components of all connective tissues
ground substance, fibers, and cells
List the 2 categories of connective tissues
connective tissue proper
specialized connective tissue
example of connective tissue proper
loose CT, adipose CT, dense CT
example of specialized connective tissue
blood bone cartilage
3 types of muscle tissue
skeletal cardiac smooth
attached to bones
skeletal
in walls of hollow organs
smooth
only found in heart
cardiac
moves body
skeletal
responsible for pumping blood to the rest of the body
cardiac
propels substances or objects through internal passageways
smooth
voluntary
skeletal
involuntary
smooth and cardiac
location of the nervous tissue
brain spinal cord and nerves
List the 11 organ systems in the human body.
integumentary skeletal muscular nervous endocrine cardiovascular lymphatic respiratory digestive urinary reproductive
consists of skin, hair, nails, sweat and oil glands
integumentary system
functions of integumentary system
protection
temperature regulation
produces vitamin D
contains senses
3 layers of skin
epidermis
dermis
hypodermis
outermost layer
epidermis
forms a protective barrier against environmental hazards
epidermis
in the epidermis what is there a lot of
mitosis—–bottom layer of cells
much thicker than epidermis and is primarily connective tissue
dermis
contains blood vessels, hair follicles, oil glands, sweat glands, sensory structures, and nerve endings
dermis
below dermis
hypodermis
is mostly fat
hypodermis
Explain how part of the skin is dead yet we still make more.
bottom layer of cells—lots of mitosis
function of hypodermis
cushion, insulation
List and describe the 2 factors that produce skin color.
melanin and circulation
Describe the physiological function of tanning
increase production of melanin to radiation-protective
ability to maintain a relatively stable internal environment
homeostasis
List the 2 organ systems that maintain homeostasis in the human body.
nervous and endocrine
Describe what happens when homeostasis fails.
illness or death. ex. diabetes
measures to reverse changes back to “normal”
negative feedback mechanisms
examples of negative feedback mechanisms
blood glucose, body temp, blood pH
List the 6 functions of bones.
support movement protection storage of minerals storage of fat blood cell formation
List some examples of bones used for protection.
skull, sternum, ribs
What minerals are stored in bones?
calcium and phosphorus
Where are blood cells formed?
in bone marrow
on outside of all bones and is dense
compact bone
in flat bones and ends of long bones
spongy bone
filled with red bone marrow and where blood cells are made
spongy bone
latticework of bony plates
spongy bone
spongy bone is filled with this and it is where rbc are made
red bone marrow
for fat storage
yellow bone marrow
Explain why bone is a living tissue
has many cells-osteocytes and lots of blood vessels
Describe how our bony skeleton develops.
first is cartilage-flexible and grows quickly. then is replaced with bone
allows bone growth and is stimulated by growth hormone and sex hormones
growth plate
what is the fate of growth plates
become bone and there is no more growth
the process of continuously recycling and renewing
bone remodeling
Describe what influences bone remodeling.
hormonal, exercise , and nutrition
how many bones do we have
206
80 bones
axial
126 bones
appendicular
pectoral girdle (scapular-2 and clavicle-2) upper limbs (60) pelvic bone (2) lower limbs (60)
appendicular
skull (22) hyoid bone (1) auditory ossicles (6) vertebral column (26) thoracic cage (25)
axial
membranous areas between cranial bones in infantile skull
frontanels
function of frontanels
compression of skull to pass through birth canal and skull to accommodate growing brain
places where bones meet
joints
three types of movement allowed in joints
no movement (sutures) slight movement (between vertebrae) free movement (synovial joints)
five functions of skeletal muscles
movement posture support internal organs move blood and lymph generates heart
how many skeletal muscles do we have
more than 600
largest muscle
gluteous maximus
longest
sartorius
strongest
masseter, heart, soleus, gluteus maximus
most flexible
tongue
most active
eye muscle
Indicate the function of the nervous system.
integrates and coordinates all the bodys varied activities
what are the two types of specialized cells in the nervous system
neurons and neuroglial
example of neurons
generate and transmit messages
example of neuroglial
support and protect neurons
list 3 categories of neurons
sensory
motor
interneurons
conduct information toward brain and spinal cord
sensory neurons
carry information away from brain and spinal cord to an effector
motor neurons
integrate and interpret sensory signals
interneurons
what are two possible effectors
muscles or glands
most numerous of the neurons
interneurons
3 main components of a neuron
cell body
axon
dendrites
has normal organelles, nucleus, etc
cell body
many short, branching projections; receive signals from other cells
dendrites
single long extension; carries messages away from cell body to either another cell or to an effector
axon
action potential
nerve impulse
how does a nerve impulse occur
electrochemical signal causes from Na+ and K+ crossing the neurons membrane to go into and out of the cell
chemicals that cause an impulse to move from cell to cell
neurotransmitter
junction between a neuron and another cell
synapse
4 neurotransmitters
acetylcholine
serotonin
norepinephrine
dopamine
triggers skeletal muscle contraction
acetylcholine
promotes sense of well being
serotonin
energizing good feeling
norepinephrine
helps regulate emotions and control complex movement
dopamine
List 3 different diseases that are caused by neurotransmitter imbalances
depression, parkinson disease, ADHD
neurotransmitter than balances out depression
serotonin, norepinephrine, and dopamine (decrease)
neurotransmitter than balances out parkinson disease
decrease dopamine
neurotransmitter than balances out ADHD
decrease norepinephrine and dopamine
Name the 2 major divisions of the nervous system
central and peripheral nervous system
what is associated with central NS
brain and spinal cord
what is associated with peripheral NS
nerves
List the 2 major functional divisions of the PNS
somatic NS and autonomic NS
directs voluntary movements
somatic NS
regulates involuntary bodily activities
autonomic NS
List the 2 divisions of the autonomic nervous system
SYMPATHETIC-FIGHT OR FLIGHT
PARASYMPATHETIC- REST AND DIGEST
List the 3 ways in which the CNS is protected.
bone, membranes, fluid cushion
3 meninges
dura mater, arachnoid mater, pia mater
where is the cerebrospinal fluid located
between layers of meninges
what are the functions of the cerebrospinal fluid
shock absorption
support
nourishment and waste removal
serves as the bodys central command center, coordinating, and regulating the bodys other systems
brain
6 major parts of the brain
cerebrum thalamus hypothalamus cerebellum brain stem limbic system
cerebrum
largest part of the brain
higher level of thinking, interpreting sensations, language, decision making, creativity, memory
cerebrum
relays information to appropriate higher brain centers
thalamus
controls heart rate, breathing rate, body temp, food intake, center for emotions
hypothalamus
coordinate voluntary movement with input from joints, muscles, eyes and inner ears
cerebellum
consists of medulla oblongata, pons, and midbrain
brain stem
helps to produce emotions and memory
limbic system
2 functions of the spinal cord
conduct messages between brain and body
serves as a reflex center
automatic response to a stimulus
reflex
how many spinal nerves are there
31
how many cranial nerves are there
12