Question

QUESTION 8

In a neuron, _______________ occurs when sodium gates open.

repolarization

resting membrane potential

hyperpolarization

depolarization

2 points   

QUESTION 9

Saltatory conduction occurs from node to node.

True

False

2 points   

QUESTION 10

Which of the following proteins are active during anaerobic fermentation?

myokinase

protease

acetylcholinesterase

phosphatse

2 points   

QUESTION 11

_____________ has the greatest influence on resting membrane potential.

Sodium

Chloride

Magnesium

Potassium

2 points   

QUESTION 12

Ribosomes are in the ___________________.

soma

axon hillock

dendrite

axon

2 points   

QUESTION 13

A mixed nerve has only efferent neurons.

True

False

2 points   

QUESTION 14

Myoglobin is a protein that binds oxygen.

True

False

2 points   

QUESTION 15

Glycolysis makes approximately __________ ATPs

2

12

6

36

2 points   

QUESTION 16

________________ have extensions (feet) that support a tight seal called the blood brain barrier.

Microglial cells

Oligodendrocytes

Astrocytes

Ependymal cells

2 points   

QUESTION 17

What is the boundary of a sarcomere?

A band

H band

Z discs

I band

2 points   

QUESTION 18

Which of the following is a peptide?

Glycine

Epinephrine

Dopamine

Insulin

2 points   

QUESTION 19

Which of the following are effectors?

Sensory neurons

Muscles

Interneurons

Receptors

2 points   

QUESTION 20

This kind of contraction the length of the muscle does not change but there is an increase of tension

Isotonic

Eccentric

Concentric

Isometric

2 points   

QUESTION 21

________________ will produce cerebrospinal fluid

Schwann cells

Ependymal cells

Microglial cells

Astrocytes

2 points   

QUESTION 22

Small distinct regions of gray matter within the CNS are usually celled ________________.

white matter

nerves

nuclei

fasiscles

2 points   

QUESTION 23

The _____________ subdivision carries information from the central nervous system to skeletal muscle.

somatic

afferent

autonomic

peripheral

2 points   

QUESTION 24

Hypocalcemia can cause depression, muscle weakness, and muscle spasms.

True

False

2 points   

QUESTION 25

Loss of muscle mass from lack of activity is called _______________.

hypertrophy

tetanus

dystrophy

atrophy

2 points   

QUESTION 26

Motor commands are carried by ________ from the brain.

cranial nerves

descending

spinal nerves

ascending

2 points   

QUESTION 27

Somatic receptors are found in the skin, muscles and tendons.

True

False

2 points   

QUESTION 28

A calcium binding protein found in smooth muscle is ________________.

troponin

tropomyosin

calmodulin

dystrophin

2 points   

QUESTION 29

Tendon organs are ______________.

pain receptors

visceral recptors

chemoreceptors

proprioceptors

2 points   

QUESTION 30

Reflexes that use two neurons are called ____________ reflex arcs.

monosynaptic

ipsilateral

polysynaptic

contralateral

2 points   

QUESTION 31

The resting membrane potential has a net positive charge.

True

False

2 points   

QUESTION 32

An action potential is reversible.

True

False

2 points   

QUESTION 33

When the origin and destination of a tract are on opposite sides of the body, this is a _______________ tract

monosynaptic

polysynaptic

contralateral

ipsilateral

2 points   

QUESTION 34

Which of the following produce lactate?

Type II fast glycolytic fibers

Type I slow oxidative fibers

Red fibers

Type I slow twitch fibers

2 points   

QUESTION 35

When the origin and destination of a tract are on the same side of the body, this is a __________ tract.

polysynaptic

monosynaptic

contralateral

ipsilateral

2 points   

QUESTION 36

Identify the major parts of a typical somatic reflex. List the function of each.

Path: pWords:0

2 points   

QUESTION 37

_______________ collects information from various cells to excite a postsynaptic cell.

Reverberating

Divergent pathways

Convergent pathways

Parallel after discharge

2 points   

QUESTION 38

A neuron with one axon and several dendrites is _____________.

bipolar

multipolar

axoplasmic

unipolar

2 points   

QUESTION 39

Which of the following is an ascending tract of the spinal cord?

Gracile fasciculus

Tectospinal tract

Corticospinal tract

Reticulospinal ttract

2 points   

QUESTION 40

The ___________ carries signals to the smooth muscle in the intestines.

visceral sensory division

visceral motor division

somatic sensory division

somatic motor division

2 points   

QUESTION 41

Acetylcholine is released from the _____________ into the synaptic cleft

terminal cisterns

sarcolemma

sarcoplasmic reticulum

vescicles

2 points   

QUESTION 42

The meninx closest to bone tissue is the _______________.

subdural space

arachnoid mater

pia mater

dura mater

2 points   

QUESTION 43

___________________ receives signals in a neuron,

Axon hillock

Axons

Soma

Dendrites

2 points   

QUESTION 44

List three characteristics of nerve tissue.

Path: pWords:0

2 points   

QUESTION 45

Which of the following has the somas of sensory neurons?

Anterior ramus

Meningeal branch

Posterior (dorsal) root

Anterior (ventral) root

2 points   

QUESTION 46

There are ______ pairs of spinal nerves

31

35

12

24

2 points   

QUESTION 47

Cardiac, smooth, and skeletal muscle is ___________.

involuntary

multi-nucleated

striated

excitable

2 points   

QUESTION 48

Which of the following carries a signal to the spinal cord?

Basal ganglion

Third order neuron

First order neuron

Second order neuron

2 points   

QUESTION 49

Which is the most common inhibitory neurotransmitter?

Acetylcholine

GABA

Epinephrine

Norepinephrine

2 points   

QUESTION 50

In many pathways, second order neurons synapse with third order neurons at the _______________.

thalamus

cerebral cortex

ventral horn

dorsal root ganglion

2 points   

QUESTION 51

Cardiac muscles can contract because of _____________.

the basement membrane

tight junctions

desmosomes

intercalated discs

2 points   

QUESTION 52

Upper motor neurons synapse with lower motor neurons at the anterior horn

True

False

2 points   

QUESTION 53

A calcium binding protein found in skeletal muscle tissue is _______________.

calmodulin

troponin

tropomyosin

dystrophin

2 points   

QUESTION 54

Myelin is mostly ______________.

lipids

nucleic acids

proteins

sugars

2 points   

QUESTION 55

Alternating light and dark bands found in skeletal muscle are _____________.

myoblasts

myofibrils

striations

tetanus

2 points   

QUESTION 56

The ___________ division tends to have a calm effect on the body.

parasympathetic

somatic

central nervous system

sympathetic

2 points   

QUESTION 57

Aerobic respiration produces approximately ______ ATPs per glucose molecule.

12

4

24

36

2 points   

QUESTION 58

List a similarity between skeletal, smooth and cardiac muscle tissue. List a difference between skeletal, smooth and cardiac muscle.

Path: pWords:0

2 points   

QUESTION 59

______________ carries signals from the central nervous system to skeletal muscles.

Visceral fibers

Afferent fibers

Somatic fibers

Efferent fibers

2 points   

QUESTION 60

______________ surrounds muscle fascicles.

Tendons

Perimysium

Endomysium

Epimysium

2 points   

QUESTION 61

_______________ are found in the brain and spinal cord.

Interneurons

Motor neurons

Sensory neurons

Bipolar neurons

2 points   

QUESTION 62

The ___________ stores calcium in skeletal muscle tissue.

sarcoplasm

nucleus

sarcoplasmic reticulum

sarcolemma

2 points   

QUESTION 63

This

Answer 1

Q8) Depolarisation

Sodium channels open upon a stimuli.As there are more sodium ions on the outside of the neuron,there will be a sudden rush of sodium ions inside the neuron.Generally the inside the neuron the charge will be negative.As sodium enters the neuron it changes the negative charge in to positive charge, so the neuron becomes more positively chargedand becomes depolarized.When sodium gate closes and repolarization occurs.

Q9) True

Saltatory conduction is a action potentials which generally occurs along myelinated axons and jumps or leaps from one node to the other node.

Q10) Myokinase and phosphatase

Anaerobic fermentation is a process which occurs in absence of oxygen and it is a slower process.In general kinase and phosphatase are important for energy generation and utilisation.Myokinase like hexokinase and Glucokinase is a adenylate kinase which transfers phosphate group between ATP,ADP and AMP.Phosphatase is an enzyme that involved in removal of a phosphate group.

Q11)Potassium

Generally Sodium-potassium pump channel work by exchanging two potassium ions inside the cell when three sodium ions are pumped out.This is to maintain the charge inside the cell and also to maintain the resting potential.Among these potassium have more influence in maintaining the resting membrane potential and also maintains negative charge inside the cell by closing sodium channel.