These smaller vessels comes from the larger arteries and branch

| June 13, 2018

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 51The basic unit of contraction in a muscle is thea.myofibril.b.sacromere.c.osteon.d.epiphysis.1 points Question 52The sturdy, two-layer membrane that covers bone is called thea.pericardium.b.perimycium.c.periosteum.d.pericomium.1 points Question 53The neurotransmitter used for muscle contractions isa.serotonin.b.GABA.c.dopamine.d.acetylcholine.1 points Question 54What 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 55Fluid inside most human cells is abouta.pH 7b.pH 11c.pH 4d.pH 91 points Question 56During muscle contractionsa.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 57All of the following are functions of bones EXCEPT:a.movement.b.protection.c.mineral storage.d.fat storage.1 points Question 58Erythropoetina.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 59Which of the following would NOT be found inside a Haversian canal?a.bone cell.b.blood capillary.c.nerve.d.nutrients.1 points Question 60The sliding filament mechanisma.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 61Pyruvate is the end product ofa.glycolysis.b.acetyl CoA formation.c.Kreb’s cycle.d.fermentation.1 points Question 62A reaction of an acid and a base will produce water anda.a buffer.b.a salt.c.a gas.d.a solute.1 points Question 63Which of the following is NOT included in connective tissues?a.bone.b.skeletal muscle.c.blood.d.cartilage.1 points Question 64Which type of bond makes water liquid?a.ionic.b.covalent.c.hydrogen.d.polar covalent.1 points Question 65These contain enzymes used in the breakdown of glucose and generation of ATPa.Golgi bodies.b.ribosomes.c.mitochondria.d.nucleus.1 points Question 66Each skeletal muscle fiber is also called aa.muscle cell.b.myofibril.c.sacromere.d.muscle.1 points Question 67The method of movement that requires the expenditure of ATP molecules isa.diffusion.b.osmosis.c.active transport.d.passive transport.1 points Question 68The pulmonary artery carriesa.oxygenated blood to the lungsb.oxygenated blood to the heartc.deoxygenated blood to the lungsd.deoxygenated blood to the heart1 points Question 69This valve opens from the right ventricle into the pulmonary artery:a.aorticb.atrioventricularc.bilunard.pulmonary valve1 points Question 70This is the largest and major artery carrying blood away from the hearta.pulmonary arteryb.hepatic arteryc.vena cavad.aorta1 points Question 71The nucleus of an atom containsa.protons only.b.neutrons only.c.protons and electrons.d.protons and neutrons.1 points Question 72Magnesium has 12 protons. How many electrons are in its third energy level?a.2b.4c.6d.81 points Question 73Which subatomic particle has a positive charge?a.electron.b.neutron.c.proton.d.photon.1 points Question 74Which 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 75These are the primary cellular sites for the assembly of proteins.a.Golgi bodies.b.ribosomes.c.lysosomes.d.endoplasmic reticulum.1 points Question 76The atomic number refers to thea.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 77The pH scale measures the:a.hydroxide ion concentrationb.concentration of a water-based solutionc.hydrogen ion concentrationd.number of water molecules in a solution1 points Question 78Movement of the forearm so that the palm faces to the rear is calleda.supination.b.pronation.c.extension.d.flexion.1 points Question 79A 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 80This valve opens from the left ventricle into the aorta:a.aortic valveb.pulmonary valvec.atrioventricular valved.cardiac valve1 points Question 81Moving a limb away from the body’s midline is calleda.abduction.b.adduction.c.circumduction.d.extension.1 points Question 82The atria of the heart are:upper chambers of the heartlower chambers of the heartresponsible for heart attacksnone of the above.1 points Question 83An organelle that is a flattened channel that begins at the nuclear envelope and snakes through the cytoplasm is thea.Golgi body.b.Endoplasmic reticulum.c.ribosome.d.lysosome.1 points Question 84A molecule is:a.electrically charged.b.a carrier of one or more extra neutrons.c.a combination of two or more atomsd.none of these.1 points Question 85Sebaceous glandsa.secrete oil.b.are found in the skin.c.are exocrine glands.d.all of the above.1 points Question 86Most of the molecules in cell membranes area.proteins.b.carbohydrates.c.phospholipids.d.nucleic acids.1 points Question 87These type of blood cells are biconcave discs and do not contain a nucleus:a.lymphocytes.b.platelets.c.erythrocytes.d.neutrophils.1 points Question 88What 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 89Which blood cell is the most abundant in the human body?a.erythrocytes.b.platelets.c.lymphocytes.d.basophils.1 points Question 90The 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 91The basic cells that the body uses for rapid communication and control area.neurons.b.chondrocytes.c.formed elements.d.muscles.1 points Question 92This node is a cluster of self-exciting cells that establish a regular heartbeat and is known as the cardiac pacemaker:a.cardiac conductionb.atrioventricular (AV) nodec.purkinge noded.sinoatrial (SA) node1 points Question 93Which two subatomic particles are almost always equal in numbera.protons and electrons.b.neutrons and electrons.c.protons and neutrons.d.photons and neutrons.1 points Question 94Cells that produce the pigment found in the epidermis are calleda.keratinocytes.b.melanocytes.c.Langerhans cells.d.adipose cells.1 points Question 95All of the following are types of granulocytes EXCEPT:a.neutrophils.b.basophils.c.lymphocytes.d.eisonophils.1 points Question 96Proteins that speed up reactions are known asa.saltsb.buffersc.polymersd.enzymes1 points Question 97How many ATP molecules (net yield) are produced per molecule of glucose degraded during glycolysis?a.1b.2c.4d.361 points Question 98Muscle that is NOT striped and is involuntary isa.cardiacb.skeletalc.smoothd.striated1 points Question 99A “slow” muscle in humans is red in color, this is due to large amounts ofa.myoglobin.b.hemoglobin.c.mitochondria.d.nuclei.1 points Question 100In spongy bone tissue the spaces are filled witha.marrow.b.blood.c.cartilage.d.air.

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