Exam (elaborations)
A&P I (DR TIANGCO, ECPI) EXAM #3 (CHAPTERS 6-9) QUESTIONS AND ANSWERS
A&P I (DR TIANGCO, ECPI) EXAM #3 (CHAPTERS 6-9) QUESTIONS AND ANSWERS
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A&P I (DR TIANGCO, ECPI) EXAM #3(CHAPTERS 6-9) QUESTIONS AND
ANSWERS
Dermis - Answer-Deepest layer of skin
Stratum Corneum - Answer-Most superficial layer of the epidermis
Function of skin - Answer-Excretes waste, secretory, protection, cosmetic
scalp, armpit, face, arms, legs, pubic area, - Answer-common locations of hair growth
Function of hair - Answer-sunshade, bug sensor, protection
Dermis - Answer-thickest layer of skin
smooth - Answer-The arrector pili muscle is made of ________muscle
UV radiation - Answer-stimulates melanocytes to make more melanin
Melanocytes - Answer-The epidermis contains
blood vessels - Answer-the dermis contains
skin blood vessels tend to dilate - Answer-in response to hyperthermia
skin blood vessels tend to constrict - Answer-in response to hypothermia
hypodermis or subcutaneous layer - Answer-not a true layer of skin
stratum basale - Answer-the deepest layer of the epidermis whose cells are alive and
actively mitotic
hair follicle - Answer-pouch-like depression (invagination) of the epidermis and dermis
where the hair root exist
apocrine - Answer-type of sweat gland found in the axillary and groin region whose
secretions are metabolized by bacteria thereby creating body odor
Eccrine - Answer-the most common type of sweat gland whose secretions are watery-
like and are mainly involved with thermoregulation
muscle function - Answer-move body parts, generate body heat, protect against trauma
, perimysium - Answer-connective tissue layer that surrounds fascicles in a muscle
fascicles - Answer-bundles of muscle fibers
myofibrils - Answer-organelle that is a bundle of actin and myosin filaments
T-tubule - Answer-Sarcolemma invagination that helps internalize the muscle impulse
Sarcoplasmic reticulum - Answer-Organelle that stores calcium until it is needed
myosin - Answer-the thick filament
troponin - Answer-the regulatory protein that senses calcium
Motor unit - Answer-one motor neuron and ALL the MUSCLE FIBERS it controls
sarcomere - Answer-muscle fiber unit that extends from one z-line to the next z-line
I-band - Answer-the light band
Acetycholine - Answer-the neurotransmitter that stimulates skeletal muscles to contract
ATP - Answer-Powers muscle contraction
acetylcholinesterase - Answer-enzyme that destroys the neurotransmitter of the skeletal
muscle contraction
slow twitch - Answer-muscle found in marathon runners
slow twitch - Answer-type of muscle that is fatigue-resistant due to high myoglobin and
high mitochondria content
Increase frequency of twitches and recruit more motor units - Answer-to increase
muscle tension we can
origin - Answer-muscles anchoring point into bone that does not move (immovable)
antagonists - Answer-muscle that opposes movement of the prime mover
atrophy - Answer-muscle wasting away
fatigue - Answer-lactic acid build up may eventually lead to muscle
creatinine phosphate - Answer-recharges ATP from ADP
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