A&p Test 2 Review

Front 1

Which of the following muscle tissues use calcium ions that enter from the ECF?

Back 1

Cardiac, multi-unit smooth, single-unit smooth

Front 2

____ joint is biaxial. radioulnar, humeroulnar, atlantooccipital, metatarsophalangeal, humeroscapular

Back 2

metatarsophalangeal

Front 3

What causes flaccid paralysis

Back 3

botulism, curare

Front 4

what do sutures, gomphoses, and syndesmoses have in common

Back 4

they are all fibrous joints

Front 5

Drugs called calcium channel blockers may be used to lower blood pressure by causing arteries to vasodilate. These drugs

Back 5

prevent calcium from entering smooth muscle, thus allowing the muscle to relax

Front 6

If potassium were the only ion affecting the resting membrane potential, it would give a membrane potential:

Back 6

at or near the potassium equilibrium potential

of about -90 mV

Front 7

which of the following will return the body to the SAP? extension, adduction, flexion, supination, elevation

Back 7

extension, adduction, supination

Front 8

which of the following is true of slow oxidative fibers as compared to fast glycolytic fibers? Slow fibers

have more abundant glycogen, have thicker diameter, have more abundant myoglobin, more fatigue resistant

Back 8

have more abundant myoglobin, more fatigue resistant

Front 9

the function of dystrophin is to

Back 9

connect internal tension to external fiber membrane

Front 10

Myosin heads have a low affinity for actin when

Back 10

ATP is attached

Front 11

The mechanical advantage of a lever is

Back 11

ratio of the effort arm length over the resistance arm length

Front 12

A cluster of axons in the CNS is called a

Back 12

tract

Front 13

The glial cells that line the ventricles in the brain are

Back 13

ependymal cells

Front 14

Which of the following decrease or disappears during skeletal muscle contractions?

Back 14

the width of the H band, I band, the distance between z discs

Front 15

which membrane surrounds and separates muscle fibers from each other?

Back 15

endomysium

Front 16

All of the following are typical characteristics of neurotransmitters

Back 16

they are released into the bloodstream before reaching the postsynaptic cell

Front 17

Influx of chloride across the postsynaptic membrane would cause

Back 17

ISPS

Front 18

The ANS

Back 18

is the visceral motor division of the PNS, innervates the heart and glands, stimulates piloerector muscles

Front 19

Which of the following axons would have the fastest action potential conduction velocity

Back 19

large diameter, myelinated

Front 20

The integrative functions of the nervous system are performed mainly by

Back 20

interneurons

Front 21

What would be the magnitude of 10 mV local potential be on a membrane with a length constant of 2mm at a distance of 2 mm from where it started?

Back 21

3.7 mV

Front 22

The sensory function of the nervous system are performed mainly by

Back 22

afferent neurons

Front 23

Differences in the volume of a sound are likely to be encoded by differences in ___ in nerve fibers from the inner ear

Back 23

firing frequency

Front 24

for an action potential to begin, an area of excitable membrane must

Back 24

be depolarized to threshold levels

Front 25

The biceps brachii muscles is stimulated to have the anterbrachium life a 5kg weight. This is an _____ contraction.

Back 25

isometric then isotonic

Front 26

Myasthenia graves is a disorder in which

Back 26

the neurons controlling skeletal muscles begin to atrophy

Front 27

Which of the following is true concerning the isometric contraction

Back 27

the muscle tenses but length remains unchanged

Front 28

Which of the following muscle tissues contains troponin as a calcium receptor

Back 28

Cardiac, skeletal