Tissues- what types? correct answers 1. Epithelial
2. connective
3. nervous
4. muscle
skeletal system function correct answers 1. protection
2. movement
3. mineral storage
4. production of blood
osteoblasts correct answers responsible for bone formation and breakign it down to be re-for...
Dr Collins PCAT Biology || very Flawless.
Tissues- what types? correct answers 1. Epithelial
2. connective
3. nervous
4. muscle
skeletal system function correct answers 1. protection
2. movement
3. mineral storage
4. production of blood
osteoblasts correct answers responsible for bone formation and breakign it down to be re-formed.
bone contains what? and heals better than what? correct answers contains blood vessels and heals
better than cartilage, which has no bloody supply and needs nutrients to diffuse in
axial skeleton are composed of what? correct answers skull, vertebral column, and rib cage
appendicular skeleton correct answers bones associated with appendages
when muscles move in different directions, how is this achieved? correct answers action of pairs
of antagonistic or opposing muscles ( triceps/biceps)
- contract or relax. REQUIRES CALCIUM
muscles are made up of what? correct answers bundles of muscle fibers
muscle fibers are made up of what? correct answers made up of myofibrils
myofibrils are composed of what? correct answers of two proteins: actin and myosin which play
a major role in a sliding filament model
two types of muscle correct answers 1. smooth
2. striated
controlling movement correct answers sending signals to muscles to make them move
acetylcholine correct answers a nerotransmitter, binds to acetylcholine receptor on the receiving
cell
, action potential, what happens to cell? correct answers changes in ionic/ charge state
- cell changes from resting of -70 millivolts to becoming positively charged
- ionic conditions also reverse with Na going in and K going out. neuron then returns to its
normal state of high K and low Na
CNS components correct answers brain and spinal cord
meninges correct answers covering of CNS: surrounds the brain and spinal cord
autonomic nervous system correct answers Involuntary functions, involves skeletal muscle
sympathetic system correct answers accelerates things
parasympathetic correct answers slows things down ( para- to stop in spanish)
reflexes process correct answers invovle sensory formation which isnt processed by the brain.
reflexes are faster because signal doesnt have to be sent up and then return to brain.
where does reflex processing occur? correct answers in a region of the spinal cord
cerebrum correct answers function are processing of sensory info and memory
cerebellum correct answers receives info and from muscles and sensory receptors, controls
balance and coordinated movement
brain stem correct answers controls many autonomic function
EYE: light goes through which parts of eye? correct answers cornea--> lens--> iris
Iris controls? correct answers amount of light passing through the lens
outer ear fxn correct answers collecting sound and sending it to the eardrum through the auditory
canal
middle ear fxn correct answers seperated by outer ear by tympanic membrane.
is connected to pharynx by auditory and eustahian tube.
equalize pressure
tympanic membrane correct answers picks up small vibrations and passes them though the small
bones
eustachian tube correct answers connects middle ear to pharnyx
inner ear fxn correct answers made up of three cochlea and 3 semsicircular canals
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