Alexandra Brown
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A&P Quiz on A&P exam 3, created by Alexandra Brown on 26/03/2017.

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Alexandra Brown
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A&P exam 3

A&P exam 3

Question 1 of 51

1

for each ATP it uses the sodium-potassium pump

Select one of the following:

  • 2 Na+ ions into the cell and 3 K+ ion out

  • 2 Na+ ions out of the cell and 3 K+ ions in

  • 3 Na+ ions into the cell and 2 K+ ions out

  • 3 Na+ ions out of the cell and 2 K+ ions in

Explanation

Question 2 of 51

1

the active sites to which cross-bridges attach are found on the

Select one of the following:

  • myosin myofilamens

  • actin myofilaments

  • Z disks

  • T tubules

Explanation

Question 3 of 51

1

which of the following actions is cause by contraction of skeletal muscle

Select one of the following:

  • contraction of the heart

  • moving your feet in walking

  • movement of food through the gut

  • emptying of the urinary bladder

Explanation

Question 4 of 51

1

skeletal muscle fibers

Select one of the following:

  • possess striations

  • can contract but are not extensible or excitable

  • do not require nerve innervation to contract

  • are found in the walls of the stomach

Explanation

Question 5 of 51

1

list the following structures in order from smallest to largest (1) muscle fiber, (2) myofilament, (3) myofibril, (4) muscle fascicle

Select one of the following:

  • 4, 2, 3, 1

  • 2, 1, 4, 3,

  • 3, 1, 4, 2,

  • 2, 3, 1, 4

Explanation

Question 6 of 51

1

which of the following is composed of myosin molecules

Select one of the following:

  • thick myofilaments

  • I Bands

  • Z disks

  • tropomysin

Explanation

Question 7 of 51

1

which type of muscle tissue has small spindle-shaped cells

Select one of the following:

  • skeletal muscle

  • smooth muscles

  • cardiac muscle

  • both cardiac and smooth muscle

Explanation

Question 8 of 51

1

channels that open or close in response to changes in membrane potential across the plasma membrane are called

Select one of the following:

  • chemically-gated channels

  • non-gated channels

  • relegated channels

  • voltage-gated channels

Explanation

Question 9 of 51

1

depolarization of the cell membrane occurs when there is a rapid influx (inflow) or

Select one of the following:

  • potassium ions

  • chloride ions

  • calcium ions

  • sodium ions

Explanation

Question 10 of 51

1

the region of the sarcomere that contains both actin and myosin myofilaments is called the

Select one of the following:

  • I band

  • A band

  • Z disk

  • H zone

Explanation

Question 11 of 51

1

which of the following statements regarding the sliding filament model is false

Select one of the following:

  • actin and myosin do not shorten during contraction

  • both actin and myosin myofilaments shorten during contraction

  • the I band and H zones became narrower during contraction

  • the A band remains constant in length

Explanation

Question 12 of 51

1

the electrical properties of cells are the result of cells are the result of

Select one of the following:

  • ion concentration differences across the plasma membrane

  • receptor sites that are present on the plasma membrane

  • phosphorylation reactions within the cytoplasm

  • phospholipids in the cell membrane

Explanation

Question 13 of 51

1

which of the following statements concerning Type 1 (=red/slow oxidative) muscle fibers is false

Select one of the following:

  • they have large deposits of myoglobin

  • they are well adapted to anaerobic activity

  • they have a well developed bloody supply

  • they have low glycogen stores

Explanation

Question 14 of 51

1

a stimulu either causes an action potential or it doesn't. this is called

Select one of the following:

  • an all-or-none reponse

  • a graded reponse

  • a latent period response

  • a relative refractory repose

Explanation

Question 15 of 51

1

the junction between two neurons is a

Select one of the following:

  • ganglia

  • synapse

  • fascicle

  • node of Ranvier

Explanation

Question 16 of 51

1

synaptic vesicles in the neuromuscular junction contain

Select one of the following:

  • calcium

  • acetylcholine

  • acetylcholinesterase

  • sodium

Explanation

Question 17 of 51

1

T tubules

Select one of the following:

  • provide nutrients to the muscle fiber

  • conduct action potentials deep into the muscle cells

  • release acetylcholine

  • store calcium ions

Explanation

Question 18 of 51

1

which of the following causes an unequal ion concentration across the resting plasma membrane

Select one of the following:

  • the functioning of the sodium-chloride pump

  • the attraction of chloride ions to other intracellular anions

  • the attraction of sodium ions to chloride ion

  • the repulsion of potassium ions by the intracellular anions

Explanation

Question 19 of 51

1

what is a triad

Select one of the following:

  • a protein found along the groove of the F-actin double helix

  • a T tubule and two adjacent terminal cisternae

  • the combination of myosin heads with active sites on actin moecules

  • after exercise, the oxygen taken in that exceeds the oxygen required for resting metbolism

Explanation

Question 20 of 51

1

anaerobic respiration in skeletal muscle cells can lead to the build upof

Select one of the following:

  • creatine phosphate

  • lactic acid

  • glucose

  • uric acid

Explanation

Question 21 of 51

1

Gaps between Schwann cells in the myelin sheath are called

Select one of the following:

  • internodes

  • tight junctions

  • nodes of Ranvier

  • gap junctions

Explanation

Question 22 of 51

1

the sensory (afferent) division of the peripheral nervous system

Select one of the following:

  • transmits action potential to sensory organs

  • conveys action potentials to the CNS

  • stimulates glands to release hormones

  • stimulates muscle contractions

Explanation

Question 23 of 51

1

the sarcoplasmic retiulum

Select one of the following:

  • stores calcium ions

  • shortens during muscle contraction

  • transmits nerve impulses to the myofibrils

  • connects adjacent sarcomeres

Explanation

Question 24 of 51

1

in smooth muscle, cross-bridging occurs due to

Select one of the following:

  • calcium binding to troponin

  • calcium binding to calmodulin

  • myosin kinase adding a phosphate to myosinheads

  • both calcium binding to calmodulin and myosin kinase adding a phosphate to myosin heads

Explanation

Question 25 of 51

1

the sites where a chemical substance is transmitted from the presynaptic terminal of an axon to the postsynaptic membrane of a muscle fiber are called

Select one of the following:

  • neuromuscular junctions

  • sarcomeres

  • myofilaments

  • cell body of neuron

Explanation

Question 26 of 51

1

in skeletal muscle, in order for muscle relaxation to occur

Select one of the following:

  • calcium ion must be transported to troponin

  • power strikes slow down

  • the active sites on actin must be blocked

  • sodium ions must be actively transported to troponin

Explanation

Question 27 of 51

1

the time between application of the stimulus to motor neuron and the beginning of contraction called the _______ phase

Select one of the following:

  • contraction

  • latent or lag

  • refractory

  • threshold

Explanation

Question 28 of 51

1

during the absolute refractory period in an action potential, the cell

Select one of the following:

  • generates many local potentials

  • is insensitive to further stimulation

  • responds to even weak stimuli

  • reverses the direction of the action potential

Explanation

Question 29 of 51

1

collections of nerve cell bodies in the nervous system are called

Select one of the following:

  • ganglia

  • nerves

  • nuclei

  • tracts

Explanation

Question 30 of 51

1

which of the following events is not a characteristic of an action potential

Select one of the following:

  • the plasma membrane becomes highly permeable to sodium ions and depolarization results

  • As sodium ions enter, the inside of the plasma membrane becomes more negative

  • at the peak of depolarization, sodium channels begin to close and potassium channels open

  • in repolarization, potassium ions flow out of the cell

Explanation

Question 31 of 51

1

adductor longus is named for its

Select one of the following:

  • function and orientation

  • location and size

  • type and shape

  • function and size

Explanation

Question 32 of 51

1

which of the following muscles is found in the lateral compartment of the leg

Select one of the following:

  • plantaris

  • tibialis anterior

  • fibularis longus

  • extensor digitorum longus

Explanation

Question 33 of 51

1

which cells produce the cerebrospinal fluid that bathes the brain and spinal cord

Select one of the following:

  • astrocytes

  • oligodendrocytes

  • macrophages

  • ependymal cells

Explanation

Question 34 of 51

1

in a neuromuscular junction, what causes the release of synaptic vesicles

Select one of the following:

  • inflow of Ca++ into the axon terminal

  • inflow of Na+ on postsynaptic cell membrane

  • outflow of K+ ions from the axon terminal

  • release of acetylcholine from axon terminals

Explanation

Question 35 of 51

1

the point of attachment of skeletal muscle on the moving bone is termed its

Select one of the following:

  • origin

  • insertion

  • antagonist

  • synergist

Explanation

Question 36 of 51

1

a prime mover is

Select one of the following:

  • a muscle working in opposition to another muscle

  • the end of the muscle where the action occurs

  • the muscle that does most of the movement

  • a group of muscles that work together

Explanation

Question 37 of 51

1

which of the following muscles moves the scapula

Select one of the following:

  • trapezius

  • bicep brachii

  • latissimus dorsi

  • pectoralis major

Explanation

Question 38 of 51

1

visceral smooth muscle

Select one of the following:

  • contain f groups of cells that function as an independent unit

  • occurs in sheets and exhibits numerous gap junction

  • contracts only when stimulated

  • does not function as a unit

Explanation

Question 39 of 51

1

which of the following statements concerning smooth muscle is true

Select one of the following:

  • it contains many sarcomeres

  • caveolae seem to take place of myofibrils

  • a calcium-calmodulin complex initiates cross-bridge

  • the cells are large multinuclear

Explanation

Question 40 of 51

1

synapses are characterized by

Select one of the following:

  • the release of neurotransmitter by the presynaptic terminal

  • protein channels that connect the pre- and postsynaptic cells

  • the presence of receptors for nerotransmitters on the presynaptic terminal

  • receptors located only on the presynaptic terminal

Explanation

Question 41 of 51

1

coding for intensity in neurons is accomplished by increased frequency of action potentials

Select one of the following:

  • True
  • False

Explanation

Question 42 of 51

1

in skeletal muscle, what releases the head of myosin molecule from its binding site on actin

Select one of the following:

  • a drop in Ca++ concentration in the cytoplasm

  • an ATP molecule binds to the head

  • the end of the power stroke

  • release of phosphate

Explanation

Question 43 of 51

1

a neuroglial cell that i a major component of the blood-brain barrier is the

Select one of the following:

  • astrocyte

  • oligodendrocyte

  • ependymal cell

  • macrophage

Explanation

Question 44 of 51

1

In smooth muscle, most of the calcium needed for muscle contraction

Select one of the following:

  • is in the dense bodies

  • enters from extracellular fluid

  • must be activated by myosin kinase

  • is stored in the sarcoplasmic reticulum

Explanation

Question 45 of 51

1

which of the following is NOT true of the latch state of smooth muscle contraction

Select one of the following:

  • it results from the stretching and relaxation of the smooth muscle

  • it explains why smooth muscle can sustain tension for long periods of time

  • it occurs because myosi phosphate removes the phosphate group from myosin

  • it allows contraction without a large energy expenditure

Explanation

Question 46 of 51

1

the junction between two neurons is a

Select one of the following:

  • ganglia

  • synapse

  • fascicle

  • node of Ranvier

Explanation

Question 47 of 51

1

the muscles of the anterior group of forearm muscles are primarily

Select one of the following:

  • flexors

  • extensors

  • abductors

  • adductors

Explanation

Question 48 of 51

1

which of the following extends the forearm and has its insertion on the ulna

Select one of the following:

  • deltoid

  • teres major

  • infraspinatus

  • trapezius

Explanation

Question 49 of 51

1

which of the following is a part of the quadriceps femoris muscle group?

Select one of the following:

  • pectineus

  • satorius

  • vastus lateralis

  • tenso fasciae latae

Explanation

Question 50 of 51

1

which of the following muscles is part of the rotator cuff?

Select one of the following:

  • teres major

  • infraspinatus

  • deltoid

  • trapezius

Explanation

Question 51 of 51

1

An action potential lasts about

Select one of the following:

  • 0.3 ms

  • 3 ms

  • 30 ms

  • 300ms

Explanation

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