These smaller vessels comes from the larger arteries and branch

13 Jun These smaller vessels comes from the larger arteries and branch

Question

These smaller vessels comes from the larger arteries and branch into capillaries:

a.
venules

b.
arterioles

c.
capillary sphincters

d.
none of the above

1 points

Question 51
The basic unit of contraction in a muscle is the
a. myofibril.
b. sacromere.
c. osteon.
d. epiphysis.
1 points

Question 52
The sturdy, two-layer membrane that covers bone is called the
a. pericardium.
b. perimycium.
c. periosteum.
d. pericomium.
1 points

Question 53
The neurotransmitter used for muscle contractions is
a. serotonin.
b. GABA.
c. dopamine.
d. acetylcholine.
1 points

Question 54
What is the function of hemoglobin?
a. to transport nutrients.
b. to transport oxygen and carbon dioxide.
c. to transport iron.
d. to transport fat-soluble vitamins.
1 points

Question 55
Fluid inside most human cells is about

a. pH 7
b. pH 11
c. pH 4
d. pH 9
1 points

Question 56
During muscle contractions
a. the actin and myosin filaments slide over each other.
b. the actin filaments move toward the middle of the sacromere during contraction and away on relaxation.
c. the muscle thickens.
d. all of the above.
1 points

Question 57
All of the following are functions of bones EXCEPT:
a. movement.
b. protection.
c. mineral storage.
d. fat storage.
1 points

Question 58
Erythropoetin
a. is the most common blood protein.
b. stimulates the red bone marrow to generate red blood cells.
c. increases the permeability of plasma to transport carbon dioxide.
d. is an enzyme that functions in blood clotting.
1 points

Question 59
Which of the following would NOT be found inside a Haversian canal?
a. bone cell.
b. blood capillary.
c. nerve.
d. nutrients.
1 points

Question 60
The sliding filament mechanism
a. supplies the energy needed for muscle contractions.
b. provides a flexing action for the muscle fibers.
c. describes the action of the actin and myosin in a muscle cell.
d. explains muscle fatigue.
1 points

Question 61
Pyruvate is the end product of

a. glycolysis.
b. acetyl CoA formation.
c. Kreb’s cycle.
d. fermentation.
1 points

Question 62
A reaction of an acid and a base will produce water and

a. a buffer.
b. a salt.
c. a gas.
d. a solute.
1 points

Question 63
Which of the following is NOT included in connective tissues?
a. bone.
b. skeletal muscle.
c. blood.
d. cartilage.
1 points

Question 64
Which type of bond makes water liquid?
a. ionic.
b. covalent.
c. hydrogen.
d. polar covalent.
1 points

Question 65
These contain enzymes used in the breakdown of glucose and generation of ATP
a. Golgi bodies.
b. ribosomes.
c. mitochondria.
d.
nucleus.

1 points

Question 66
Each skeletal muscle fiber is also called a
a. muscle cell.
b. myofibril.
c. sacromere.
d. muscle.
1 points

Question 67
The method of movement that requires the expenditure of ATP molecules is

a. diffusion.
b. osmosis.
c. active transport.
d. passive transport.
1 points

Question 68
The pulmonary artery carries

a.
oxygenated blood to the lungs

b.
oxygenated blood to the heart

c.
deoxygenated blood to the lungs

d.
deoxygenated blood to the heart

1 points

Question 69
This valve opens from the right ventricle into the pulmonary artery:

a.
aortic

b.
atrioventricular

c.
bilunar

d.
pulmonary valve

1 points

Question 70
This is the largest and major artery carrying blood away from the heart

a.
pulmonary artery

b.
hepatic artery

c.
vena cava

d.
aorta

1 points

Question 71
The nucleus of an atom contains

a. protons only.
b. neutrons only.
c. protons and electrons.
d. protons and neutrons.
1 points

Question 72
Magnesium has 12 protons. How many electrons are in its third energy level?

a. 2
b. 4
c. 6
d. 8
1 points

Question 73
Which subatomic particle has a positive charge?

a. electron.
b. neutron.
c. proton.
d. photon.
1 points

Question 74
Which is the smallest unit of life that can exist as a separate entity?
a. cell.
b. molecule.
c. organ.
d. organ system.
1 points

Question 75
These are the primary cellular sites for the assembly of proteins.

a. Golgi bodies.
b. ribosomes.
c. lysosomes.
d. endoplasmic reticulum.
1 points

Question 76
The atomic number refers to the
a. mass of an atom.
b. the number of protons in an atom.
c. the number of both protons and neutrons in an atom.
d. the number of electrons in an atom.
1 points

Question 77
The pH scale measures the:

a. hydroxide ion concentration
b. concentration of a water-based solution
c. hydrogen ion concentration
d. number of water molecules in a solution
1 points

Question 78
Movement of the forearm so that the palm faces to the rear is called
a. supination.
b. pronation.
c. extension.
d. flexion.
1 points

Question 79
A bond that joins atoms that have opposite charges is a(n):

a. covalent bond.
b. hydrogen bond.
c. ionic bond.
d. isotope bond.
1 points

Question 80
This valve opens from the left ventricle into the aorta:

a.
aortic valve

b.
pulmonary valve

c.
atrioventricular valve

d.
cardiac valve

1 points

Question 81
Moving a limb away from the body’s midline is called
a. abduction.
b. adduction.
c. circumduction.
d. extension.
1 points

Question 82
The atria of the heart are:

upper chambers of the heart

lower chambers of the heart

responsible for heart attacks

none of the above.

1 points

Question 83
An organelle that is a flattened channel that begins at the nuclear envelope and snakes through the cytoplasm is the

a. Golgi body.
b. Endoplasmic reticulum.
c. ribosome.
d. lysosome.
1 points

Question 84
A molecule is:

a. electrically charged.
b. a carrier of one or more extra neutrons.
c. a combination of two or more atoms
d. none of these.
1 points

Question 85
Sebaceous glands

a. secrete oil.
b. are found in the skin.
c. are exocrine glands.
d. all of the above.
1 points

Question 86
Most of the molecules in cell membranes are

a. proteins.
b. carbohydrates.
c. phospholipids.
d. nucleic acids.
1 points

Question 87
These type of blood cells are biconcave discs and do not contain a nucleus:
a. lymphocytes.
b. platelets.
c. erythrocytes.
d. neutrophils.
1 points

Question 88
What is formed when an atom loses or gains an electron?

a. a molecule.
b. an ion.
c. a compound.
d. a mixture.
1 points

Question 89
Which blood cell is the most abundant in the human body?
a. erythrocytes.
b. platelets.
c. lymphocytes.
d. basophils.
1 points

Question 90
The greatest risk for developing the Rh disease is which of the following?
a. the mother must be positive and her first and second children positive.
b. the mother must be negative and her first and second children positive.
c. the mother must be negative and her first and second children be negative.
d. the mother and father must both be negative and the children all positive.
1 points

Question 91
The basic cells that the body uses for rapid communication and control are
a. neurons.
b. chondrocytes.
c. formed elements.
d. muscles.
1 points

Question 92
This node is a cluster of self-exciting cells that establish a regular heartbeat and is known as the cardiac pacemaker:

a.
cardiac conduction

b.
atrioventricular (AV) node

c.
purkinge node

d.
sinoatrial (SA) node

1 points

Question 93
Which two subatomic particles are almost always equal in number
a. protons and electrons.
b. neutrons and electrons.
c. protons and neutrons.
d. photons and neutrons.
1 points

Question 94
Cells that produce the pigment found in the epidermis are called
a. keratinocytes.
b. melanocytes.
c. Langerhans cells.
d. adipose cells.
1 points

Question 95
All of the following are types of granulocytes EXCEPT:
a. neutrophils.
b. basophils.
c. lymphocytes.
d. eisonophils.
1 points

Question 96
Proteins that speed up reactions are known as
a. salts
b. buffers
c. polymers
d. enzymes
1 points

Question 97
How many ATP molecules (net yield) are produced per molecule of glucose degraded during glycolysis?

a. 1
b. 2
c. 4
d. 36
1 points

Question 98
Muscle that is NOT striped and is involuntary is

a. cardiac
b. skeletal
c. smooth
d. striated
1 points

Question 99
A “slow” muscle in humans is red in color, this is due to large amounts of
a. myoglobin.
b. hemoglobin.
c. mitochondria.
d. nuclei.
1 points

Question 100
In spongy bone tissue the spaces are filled with
a. marrow.
b. blood.
c. cartilage.
d. air.