A ligament connects
A.
cartilage to bone.
B.
muscle to bone.
C.
bone to bone.
D.
a cartilaginous joint.
E.
muscle to muscle.
Jill broke her cheekbone in an ice skating accident.
Which bone did she break?
A.
temporal bone
B.
mandible
C.
maxilla
D.
zygomatic bone
E.
frontal bone
What are the intervertebral disks made of?
A.
bone
B.
skeletal muscle
C.
hyaline cartilage
D.
fibrocartilage
E.
elastic cartilage
Which part of a synovial joint is a fluid-filled sac?
A.
symphysis
B.
suture
C.
synovial membrane
D.
menisci
E.
bursa
What two hormones are involved in regulating the blood calcium level?
A.
calcitonin and renin
B.
renin and aldosterone
C.
renin and PTH
D.
aldosterone and PTH
E.
PTH and calcitonin
What is the name of the muscle that is responsible for blinking and winking?
A.
latissimus dorsi
B.
trapezius
C.
pectoralis major
D.
orbicularis oculi
E.
extensor digitorum
What is the deltoid muscle shaped like?
A.
a long thin line
B.
a square
C.
a triangle
D.
a circle
E.
a trapezoid
Of the three types of muscle tissue, which is not striated?
A.
smooth muscle
B.
cardiac muscle
C.
skeletal muscle
D.
skeletal and smooth lack striations
E.
cardiac and smooth lack striations
What is the name of the small gap that separates the axon terminal of a nerve from the sarcolemma?
A.
T tubule
B.
sliding filament
C.
synaptic cleft
D.
synaptic vesicle
E.
sarcoplasmic reticulum
Of the three types of muscle tissue, which has multinucleated fibers?
A.
smooth muscle
B.
cardiac muscle
C.
skeletal muscle
D.
both smooth and skeletal muscles
E.
both cardiac and smooth muscles
What happens to the actin and myosin filaments when a muscle contracts?
A.
both of them shorten
B.
both of them lengthen
C.
both stay the same length
D.
actin shortens while myosin lengthens
E.
myosin shortens while actin lengthens
Which of the following is not a part of the brain?
A.
corpus callosum
B.
central canal
C.
cerebrum
D.
cerebellum
E.
pons
Why is the outside of a neuron positively charged?
A.
because sodium ions gather around the outside of the cell membrane
B.
because calcium ions gather around the outside of the cell membrane
C.
because potassium ions gather around the inside of the cell membrane
D.
because sodium ions gather around the inside of the cell membrane
E.
because chloride ions gather around the outside of the cell membrane
What is the summing up of the excitatory and inhibitory signals by a neuron called?
A.
integration
B.
addition
C.
polarization
D.
depolarization
E.
firing
Which of the following areas is not associated with the frontal lobe?
A.
primary motor area
B.
primary visual area
C.
premotor area
D.
motor speech (Broca's) area
E.
prefrontal area
Which of the following could happen to the neurotransmitter once it binds to the receiving membrane receptors?
A.
reabsorbed by the sending membrane
B.
absorbed by the receiving membrane in order to start the action potential
C.
stays bound to the receiving membrane
D.
released back into the synaptic cleft where it builds up
E.
degrades due to lack of Ca+
Heavy use of which drug can lead to hallucinations, anxiety, depression, paranoia, and psychotic symptoms?
A.
marijuana
B.
ecstasy
C.
heroin
D.
cocaine
Ifthenervesbetweentheeyesandtheearswereswitched,stimulationofthemechanoreceptorsin the ear would result in
A.
hearing sounds.
B.
seeing lights.
C.
both hearing sounds and seeing lights.
D.
deafness.
E.
blindness.
What type of exteroceptors are located in the ear?
A.
mechanoreceptors
B.
chemoreceptors
C.
photoreceptors
D.
thermoreceptors
E.
none of these
The utricle is especially sensitive to what type of movements?
A.
back and forth
B.
up and down
C.
standing upside
D.
spinning around
E.
bending over
The type of taste called umami allows us to enjoy what type of flavor?
A.
sweet
B.
savory
C.
sour
D.
salty
E.
bitter
Which of the following is not a layer or coat of the eye?
A.
sclera
B.
choroid
C.
retina
D.
aqueous humor
E.
collagen fibers
Which of the following describes the relaxation phase?
A.
The sarcomeres are increasing in length, and the force generated increases.
B.
The sarcomeres are increasing in length, and the force generated decreases.
C.
The sarcomeres are decreasing in length, and the force generated increases.
D.
The sarcomeres are decreasing in length, and the force generated decreases.
Which of the following is NOT a phase of a muscle twitch?
A.
contraction phase
B.
shortening phase
C.
relaxation phase
D.
latent period
When wave summation occurs, _______.
A.
individual muscle twitches are separated
B.
the muscle fiber has received a single stimulus event
C.
the muscle force generated increases
D.
the muscle force generated decreases
As the stimulus voltage was increased in the simulation, which of the following occurred?
A.
The muscle force generated decreased.
B.
The latent period decreased in length.
C.
The muscle force generated increased.
D.
The latent period increased in length.
Increasing the applied voltage in the simulation corresponds to which in vivo event?
A.
muscle fiber recruitment
B.
motor neuron recruitment
C.
motor unit recruitment
D.
muscle twitch recruitment
A motor unit is defined as _______.
A.
a single muscle fiber and all its axon terminals
B.
a nerve and a muscle
C.
the axon terminals of a single motor neuron and all of the muscle fibers that it stimulates
D.
a single neuron and a single muscle fiber
NO force is generated during which of the following?
A.
a muscle twitch
B.
the contraction phase
C.
the relaxation phase
D.
the latent period
Briefly explain the difference between stimulus intensity and stimulus frequency.
Briefly describe "motor unit recruitment."
Attach your completed Lab Exercise 2, Activity 3: The Effect of Stimulus Frequency on Skeletal Muscle Contraction lab report (PEX-02-03_FirstnameLastname.pdf) as the answer to this question.