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33 Cards in this Set

  • Front
  • Back
Yellow bone marrow consists primarily of:

bile, blood forming cells, elastic tissue, fat, dense bone
fat
A surface subject to wear would likely be covered with:

simple cuboidal epithelium
simple squamous epithelium
stratified squamous epithelium
pseudostratified epithelium
transitional epithelium
stratified squamous epithelium
Osteocytes receive nutrients by diffusion through:

canliculi
lacunae
haversion canals
the ground substance
the marrow cavity
canaliculi
Bone cells live in space called:

canaliculi
lacunae
lamellae
haversian canals
periosteums
lacunae
All glands are derived from:

connective tissue
epithelium
mesoderm
mucous membranes
serous memebranes
epithelium
Serous memebranes usually have an epithelium of what type?

simple columnar
simple squamous
stratified squamous
transitional
they contain only muscle and connective tissue
simple squamous
Which muscles attached to the hair follicles cause goose bumps?

arrector folliculi
arrector integumenti
arrector pili
levator folliculi
levator pili
arrector pili
The 2 types of sudiferous glands are:

sebaceous & eccrine
apocrine & eccrine
sebaceous & apocrine
ceruminous & sebaceous
ceruminous & apocrine
apocrine & eccrine
Growth & replacement of epidermis takes place in which layer?

dermis
hypodermis
papillary layer
stratum corneum
stratum germinativum
stratum germinativum
The basic component of hair, nails & calluses is:

keratohyalin
eleidin
carotene
keratin
melanin
keratin
Which of the following vitamins is synthesized in the skin?

A, B, C, D, E
D
Most lever systems in the body are arranged so that:

-a small input force produces a large output force
-a small input motion produces a large output motion
-input & output forces are equal
-the mechanical advantage is greater than 1
-the fulcrum is in the middle
a small input motion produces a large output motion
The role of calcium in muscle contraction is to :

-increase the action potential transmitted along the membrane
-release the inhibition on z-lines
-remove the blocking action of tropomyosin
-cause ATP binding to actin
-convert ADP to ATP
remove the blocking action of tropomyosin
The network of sacs & tubes found w/in muscle cells is the :

endoplasmic reticulum
myofibrils
sarcomeres
sarcoplasmic reticulum
T-system
sarcoplasmic reticulum
Why does muscle relaxation require energy?

-to stretch the muscle back to its resting length
-ATP must be used to regenerate creatine phosphate
-calcium must be actively transported back into the terminal cisternae
-the direction in which the myosin heads pull must be reversed
-relaxation doesn't require energy
calcium must be actively transported back into the terminal cisternae
The functional element of skeletal muscle cells is the :

myofibril
sarcomere
sarcoplasmic reticulum
thick filament
thin filament
sarcomere
When a muscle contracts anaerobically, what substance builds up?

ATP
calcium
glycogen
glucose
lactic acid
lactic acid
The section of the myofibril from one Z line to another is called a :

muscle fiber
sarcolemma
sarcomere
sarcoplasmic reticulum
t-tubule
sarcomere
Stimulating a muscle at such a frequency that the relaxation phase is eliminated results in:

asynchronous stimulation
incomplete tetanus
tetanus
treppe
wave summation
tetanus
Which of the following is true of fast-twitch muscle fibers?

they contract more slowly
they have a smaller diameter
the y have a better developed blood supply
they fatigue more easily
they contain more myoglobin
they fatigue more easily
Which of the following is a characteristic of visceral muscle?

multinucleated
voluntary
striated
forms a functional syncytium
long twitch duration
long twitch duration
Which of the following is NOT involved in "repaying" the oxygen debt?

-increased use of glucose to form ATP
-restoring levels of ATP in muscle cells
-restoring levels of creatine phosphate in muscle cells
-conversion of lactic acid to glucose in muscle cells
-conversion of lactic acid to glucose in the liver
conversion of lactic acid to glucose in muscle cells
A special type of cell-to-cell junction found in cardiac muscle is the :

myoneural junction
neuromuscular junction
cardiocyte
intercalated disc
pericardium
intercalated disc
A motor unit consists of :

-all the muscles controlled by a single motor neuron
-a muscle and its motor neurons
-a muscle cell & its motor neurons
-a motor neuron & all the muscle cells it controls
-a single muscle cell & motor neuron
a motor neuron & all the muscle cells it controls
Which of the following is a characteristic of cardiac muscle?

-voluntary
-not striated
-very short twitch duration (less than 1/10th sec)
-forms a functional syncytium
-all of the above
forms a functional synctium
Which of the following is NOT true of slow-twitch muscle fibers?

-their myosin molecules break down ATP more rapidly
-they contain large amounts of myoglobin
-they are not well adapted to anaerobic metabolism
-they have a well developed blood supply
-they have a mitochondria
their myosin molecules break down ATP more rapidly
The neurotransmitter causing contraction of skeletal muscles is:

-acetylcholine
-dopamine
-epinephrine
-norepinephrine
-serotonin
acetylcholine
Which glial cells form cerebrospinal fluid?

astrocytes
ependymal cells
microglia
oligodenderocytes
Schwann cells
ependymal cells
A neurotransmitter can have an excitatory effect by opening:

calcium channels
chloride channels
potassium channels
sodium channels
calcium & sodium channels
calcium & sodium channels
The period during which an axon will not conduct another action potential is the:

period of depolarization
period of repolarization
refractory period
resting period
transient period
refractory period
Inhibitatory neurotransmitters affect the postsynaptic neuron by:

blocking receptors
destroying acetylcholine
inactivating receptors
hyperpolarizing the membrane
increasing its permeability to sodium ions
hyperpolarizing the membrane
The part of a neuron where a synaptic potential is produced is the:

cell body
axon
dendritic zone
myelin sheath
synaptic bulb
dendritic zone
Most sensory neurons are:

apolar
bipolar
multipolar
tripolar
unipolar
unipolar