Human Bio Exam 1
There are how many different types of amino acids
20
How many bones are in the fully formed human skeleton
206
What type of fiber allows tissue to easily stretch and recoil
elastic
A pure substance that cannot be broken down into another substance is known as an
element
Which layer of the integument contains stratified squamous cells
epidermis
What type of tissue covers body surfaces or lines cavities
epithelial
In terms of classification humans belong to which domain
eukarya
Glucose moves through a protein transporter down its concentration gradient into the cell. This is an example of ___
facilitated diffusion
Each carbon atom can share pairs of electrons with as many as ___ other atoms
four
A phospholipid molecule contains a "head" portion that
is hydrophilic
A prokaryotic cell has all of the following except
a nucleus inside a membrane
The stomach and liver are located in which body cavity
abdominal
A buildup of H+ in the blood will lead to
acidosis
Which transport requires ATP utilization
active transport
The portion of the skeleton that includes bones of the limbs, shoulder and hips is classified as the
appendicular skeleton
The type of bone that forms the shaft of long bones is known as
compact bone
Which portion of nerve cells receives incoming messages
dendrite
Which bone is found on the "thumb side" of the forearm
radius
In what portion of a eukaryotic cell is the majority of DNA isolated
nucleus
A nucleotide is composed of at least one sugar, one phosphate group, and
one nitrogen containing base
Positive feedback systems play a role in
child birth
What structure connects a muscle to a bone
tendon
With each turn of the Krebs cycle
NADH and FADH2 are produced
Muscle that is striated and voluntary is
Skeletal only
A system that compensates for pH fluctuations by donating or accepting H+ is known as a
buffer
Bone tissues is a storage area for
calcium
A computer programmer complains of pain in his wrist and numbness and tingling of his fingers. He likely suffers from
carpal tunnel syndrome
Which cells supply nutrients to and remove wastes from nerve cells
glial
What molecule is the body's main energy source
glucose
The most extreme form of body temperature increase is
heat stroke
Which element is not one of the four most common elements found in organisms
helium
Exocrine glands secrete all of the following EXCEPT
hormones
Which type of bond is responsible for the linking together of two water molecules
hydrogen
The chemical reactions in cells are called
metabolism
Which statement is true of mitochondria
mitochondria possesses their own DNA
The bonding of two or more atoms creates a
molecule
When an atoms outer electron shell is filled the atom is
most stable
Membranes that line cavities and tubes in the digestive and respiratory systems are classified as
mucous
During the remodeling process, which cells break down the bone matrix
osteoclasts
The production of ATP in the mitochondria requires
oxygen
The sequence of amino acids in a protein represents its
primary structure
Most enzymes are which type of organic molecule
proteins
An acid is a substance that donates a
proton
A patient with joint pain was sent to the hospital for lab work. The results showed significant over activity of her immune system. Based on these results, the most likely diagnosis is
rheumatoid arthritis
Which skeletal structure is NOT part of the axial skeleton
scapula
In science the word theory
signifies that a hypothesis has been tested and proven over a period of time
Plants store large amounts of carbohydrates in the form of
starch
The most common type of joint in the human body is a
synovial joint
Which part of a synovial joint secretes lubricating fluid
synovial membrane
A red blood cell is placed in a solution. After a period of time, the cell has shrunk to half of its original size. Which of the following is true
the cell was placed in a hypertonic solution
Which statement is true of electron shells
the innermost shell can hold up to two electron
Homeostasis refers to
the maintenance of a constant internal state
Energy flows into the biosphere from
the sun
How do hydrophilic molecules interact with water
they are attracted to water
The heart is located in which body cavity
thoracic
Which bone is NOT part of the pectoral girdle or upper limbs
tibia
Which form of organization is classified between cell and origin
tissue
Stem cells can be found in
umbilical cord blood
Fats that stay liquid at room temperature are
unsaturated
Two solutions A and B are separated by a membrane, which is permeable to water but not salts. Solution A is 2% NaCl solution, while solution B is 3% NaCl solution. Which of the following will occur?
water will move from side A to side B