Which pigment of skin is responsible for a dark brown/black color and absorbs UV rays to protect DNA?
hemoglobin
melanin
carotene
keratin
Which layer of skin contains dead skin cells?
stratum spinosum
stratum basale
stratum corneum
stratum granulosum
Which layer of skin contains ridges and sweat pores that give us fingerprints?
dermis
epidermis
hypodermis
This layer of skin does not contain blood vessels:
Which type of gland secretes sebum into a hair follicle?
eccrine
apocrine
merocrine
sebaceous
Which sweat glands are found in the axillary and anogenital regions (may act as pheromones)?
mammary
In which ways does the skin maintain homeostasis of internal body temperature when a person is TOO HOT?
the nervous system activates sweat glands
dilation of dermal blood vessels
contraction of arrector pili
A and B
Which of these types of tissues is responsible for movement?
connective
muscle
nervous
epithelial
Where is simple squamous epithelium found?
lungs
bladder
digestive tract
intervertebral discs
Which of these is a distinguishing apical surface feature of psuedostratified columnar epithelium?
microvilli
cilia
goblet cell
none of these
Where is transitional epithelium found?
Goblet cells release
sebum
sweat
mucus
enzymes
The type of tissue responsible for support, protection, binding, fat storage, and blood transport is:
What do mast cells release that contributes to the symptoms of allergies?
histamine
platelets
hormones
macrophages
Which type of connective tissue fiber is the strongest?
collagen
reticular
elastic
Which type of connective tissue fiber can be stretched easily and recoil?
Which type of connective tissue fibers lends delicate support to soft organs?
_______________ connective tissue stores fat.
adipose
areolar
dense
Which type of cartilage is the most abundant and found in the ribs and ends of long bones?
hyaline
fibrocartilage
Which type of cartilage is the strongest, containing the most collagen fibers, and is found in the vertebral column?
Which of these statements about cartilage is false:
it is avascular
it is made of mostly water
it receives nourishment from a perichondrium
all of these are true
Which of these is not in blood?
red blood cells
white blood cells
plasma
these are all in blood
Which of these muscle tissues is under voluntary control?
cardiac
smooth
skeletal
Where is smooth muscle found?
brain
heart
spine
digestive organs
According to shape, the bones of the skull are:
short bones
long bones
flat bones
irregular bones
Which feature of bone helps reduce the bone's weight?
epiphyseal plate
osteon
marrow
trabeculae
The Haversian (central) canal contains:
blood vessels
nerve fibers
B and C
Which of these bones forms via intramembranous ossification?
humerus
skull
femur
patella
Bone cells that are responsible for secreting bone matrix are called:
osteoclasts
osteoblasts
osteocytes
chondroblasts
The disease in which osteoclast activity outweighs osteoblast activity is:
Osteomalacia
Osteoporosis
Paget's
Rickett's
Which hormone is responsible for normal bone growth and development?
growth hormone
testosterone and estrogen
insulin
Yellow marrow stores:
fat
Where is red marrow primarily found?
medullary cavity
spongy bone
compact bone
The striations of skeletal muscle form a repeating pattern of units called:
sarcomeres
myofibrils
tendons
osteons
Thick filaments are made of the protein:
troponin
tropomyosin
actin
myosin
What is a cross bridge?
when a nerve impulse travels to a muscle fiber to cause contraction
when a myosin head binds to an actin filament
when a neurotransmitter is release in the synaptic cleft
Which protein in a muscle cells stores oxygen?
myoglobin
Which ion is needed for muscle contraction to occur?
sodium
calcium
chloride
potassium
What does the sliding filament theory say?
thick and thin filaments do not really change in length
the thin filaments slide over the thick filaments
the thick filaments slide over the thin filaments
Which neurotransmitter is responsible for muscle contraction?
adensosine
serotonin
GABA
acetylcholine
An Olympic sprinter will have more:
fast twitch fibers
slow twitch fibers
When a muscle fiber cannot relax, ______________ occurs.
summation
twitch
tetanus
Which of these statements about smooth muscle contraction is false:
Smooth muscle is slower to contract and relax than skeletal muscle.
Smooth muscle can maintain a forceful contraction longer
Smooth muscle fibers can change length without changing tautness
Smooth muscle fibers are striated
Intercalated discs are unique to:
smooth muscle
skeletal muscle
cardiac muscle
_______________ of a muscle decreases an angle, while ______________ increase an angle.
rotation, extension
adduction, flexion
flexion, extension
extension, flexion
ATP is needed for:
contraction
relaxation
both
Which of these muscles is not responsible for facial expression?
Deltoid
Buccinator
Orbicularis oris
Epicranius
Which of these muscles is not responsible for moving the arm?
Teres major
Pectoralis major
Gastrocnemius
Which of these muscles is not responsible for moving the forearms?
Triceps brachii
Brachialis
Soleus
Biceps brachii
Which of these muscles is not in the lower leg?
Tibialis anterior
Gluteus maximux
Order the following structures from smallest to largest:
molecules---atoms----organelle----cell---tissue
atoms---molecules---organelle---cell---tissue
tissue---cell---organelle---molecules---atoms
cell-organelle---molecules---atoms
Which of these is not a requirement of an organism?
water
food
oxygen
pressure
these are all requirements
An example of negative feedback is:
a high body temperature provokes shivering to warm up
oxytocin induces uterine contractions
a high body temperature provokes sweating to cool off
platelets provoke further bloodclotting
The parietal and visceral pleura is found around the:
Heart
Digestive organs
Lungs
Reproductive organs
Which of these organs is not found in the thoracic cavity?
lung
stomach
C and D
A frontal (coronal) plane divides the body into:
superior and inferior parts
right and left parts
anterior and posterior parts
oblique parts
The brain, spinal cord, and nerves make up the:
nervous system
cardiovascular system
urinary system
respiratory system
The sternum is __________ to the arms.
inferior
lateral
medial
superior
The ankle is _______ to the knee.
proximal
posterior
distal
Patellar is a regional term referring to the:
back
elbow
knee
ear
******* Oxygen has 8 protons and 8 neutrons********
What is oxygen's atomic number?
2
4
16
8
******** Oxygen has 8 protons and 8 neutrons ********
What is oxygen's atomic weight?
How many electrons does oxygen have?
An atom that has the same number or protons but different number of neutrons is call a(n):
ion
cation
anion
isotope
A(n) ______________ bond is formed when electrons are transferred between atoms, resulting in one atom that lost an electron and one atom that gained an electron.
hydrogen
ionic
covalent
polar covalent
The chemical bond between atoms that equally share electrons is called a ___________ bond.
In sodium chloride, Na+ Cl-, the anion is ________ and the cation is ________.
sodium, chloride
chloride, sodium
Which of these is an example of a synthesis reaction?
amino acids joining to make a protein
glucose molecules joining together to make glycogen
glycogen breaking down to form glucose molecules
Which of these describes a catabolic reaction?
A + B ---> AB
AB + CD ---> AC + BD
AB ----> A + B
None of these
Which of these is a strong acid?
NaOH
Water
HCl
ammonium
Which of these is not a lipid?
steroids
fats
fructose
triglyceride
The building blocks of a carbohydrate are:
amino acids
polysaccharides
monosaccharides
disasscharides
What makes each amino acid unique?
the amino group
The R group (aka functional group)
the acid group
If the 3D structure of an amino acid is denatured, what happens?
the protein loses its shape and may not work
chemical reactions occur faster
special properties of that protein are lost
A and C
The building blocks of nucleic acids are:
phosphate
nucleotides
A double helix, a sugar phosphate backbone, and a nitrogenous base are all characteristics of:
protein
DNA
RNA
lipids
A reaction joining monomers to create a polymer requires:
hydrolysis
dehydration
A reaction breaking down a polymer to monomers requires:
What is the plasma membrane of a cell made of (that causes selective permeability)?
nucleic acids
phospholipids
sugars
What is the function of a ribosome?
helps with cell division (mitosis)
site of protein synthesis
packages and sorts vesicles
makes ATP
What is the function of the mitochondria?
What is the function of a lysosome?
contains digestive enzymes to get rid of old cellular parts
breaks down toxic substances in cells into H202 and water
Which of these is not part of the cytoskeleton?
nuclear envelope
microfilament
microtubule
intermediate filament
Which motile cell structure in our respiratory tract helps get rid of mucus?
flagella
centriole
What is a chromatin?
Uncondensed DNA and proteins
uncondensed RNA and proteins
proteins
What is diffusion?
the tendency of a substance to move from an area of low concentration to an area of high concentration
the tendency of a substance to move from an area of high concentration to an area of low concentration
the movement of water across a selectively permeable membrane into a compartment containing solute that cannot cross the same membrane
Which of these substances moves into the cell via facilitated diffusion?
carbon dioxide
glucose
lipid soluble substances
Solutions that have a higher osmotic pressure than body fluids (aka cells will shrink) are called:
hypertonic
hypotonic
isotonic
______________ transport is when a substance moves from a low concentration to a high concentration (aka running up a hill), and requires___________.
passive, ATP
active, ATP
facilitated diffusion, ADP
active, glucose
In which phase of the cell cycle do chromosomes line up in preparation to move to opposite poles?
prophase
metaphase
anaphase
telophase
In which phase of the cell cycle does the chromatin condense into chromosomes and the centrioles move to opposite ends of the cell?
________ is division of the nucleus, and __________ is division of the cytoplasm.
cytokinesis, mitosis
mitosis, cytokinesis
meiosis, mitosis
mitosis, meiosis
Which of these cells undergoes apoptosis regularly?
cardiac cell
skeletal cell
uterine lining cell
nerve cell
An anabolic reaction is synonymous with a ______________ reaction.
decomposition
synthetic
displacement
oxidation reduction
How do catalysts work?
by producing more heat
by increasing the number of substrate molecules
by decreasing the activation energy
by adding water
ATP ----> ADP + P
Which reaction occurred above?
synthesis
Where is the potential energy in ATP stored?
in the phosphate bonds
in the adenosine
What is an enzyme?
a lipid
a biological catalyst
a protein
If a cell needs droplets of liquid from the extracellular environment, which process occurs?
phagocytosis
receprot mediated endocytosis
pinocytosis
exocytosis