SFSU BIOL 212 FINAL EXAM ACTUAL EXAM 2026 |
COMPLETE QUESTIONS AND CORRECT ANSWERS |
VERIFIED ANSWERS | JUST RELEASED | UPDATED
VERSION
In skeletal muscle cells, for which of the following is ATP needed?
a) to allow troponin to bind to tropomyosin
b) to move calcium back into the ECF
c) to allow myosin to detach from actin
d) to move calcium from its storage site into the muscle cell's cytoplasm
e) more than one answer is correct ---------CORRECT ANSWER--------------
---to allow myosin to detach from actin
Creatine phosphate is used to convert:
a) ATP to ADP
b) deoxymyoglobin to myoglobin
c) lactic acid to pyruvic acid
d) pyruvic acid to lactic acid
e) ADP to ATP ---------CORRECT ANSWER-----------------ADP to ATP
,A contraction that generates force and moves a load is known as
____________, whereas one that generates force without movement is
known as ____________
a) isotropic/isometric
b) isometric/isotonic
c) isotonic/isometric
d) isotonic/isotropic
e) isotonic/isotonic ---------CORRECT ANSWER-----------------
isotonic/isometric
Which of the following does NOT affect the tension of in a whole
muscle?
a) twitch summation in individual fibers
b) varying the number of motor units used
c) motor unit recruitment
d) stimulating variable portions of each motor unit
e) variation in the frequency of action potentials stimulating each
muscle fiber ---------CORRECT ANSWER-----------------stimulating variable
portions of each motor unit
,weightlifting can result in a dramatic increase in skeletal muscle mass.
This increase in muscle mass is primarily attributable to which of the
following?
a) increase in skeletal muscle blood supply
b) increase in number of motor neurons
c) increase in the number of neuromuscular junctions
d) synthesis of more contractile proteins
e)increase in the number of muscle fibers ---------CORRECT ANSWER-----
------------synthesis of more contractile proteins
Which pair is MISMATCHED?
a) fast-glycolytic fiber - produces the most lactic acid
b) slow-oxidative fiber - is high in myoglobin
c) slow-oxidative fiber - most readily fatigues
d) fast-glycolytic fiber - has high myosin-ATPase activity
e) more than one answer applies ---------CORRECT ANSWER-----------------
slow-oxidative fiber - most readily fatigues
Why are interneurons needed as part of the withdrawal reflex?
a) The neurotransmitter from he afferent neuron will never match the
receptors on the efferent neuron
, b) it is a way to slow down the response
c) it allows for the flexor to contract and the extensor to relax in
response to the same afferent info
d) two of the above are correct
e) all of the above are correct ---------CORRECT ANSWER-----------------it
allows for the flexor to contract and the extensor to relax in response
to the same afferent info
In response to stepping on a nail, the crossed-extensor reflex causes:
a) flexion of the leg on the side of receptor activation
b) extension of the leg on the side of receptor activation
c) extension of the leg opposite the side of receptor activation
d) flexion of the leg opposite the side of receptor activation
e) extension of the arm on the side of receptor activation ---------
CORRECT ANSWER-----------------extension of the leg opposite the side of
receptor activation
Which type of autonomic receptor binds with the neurotransmitter
released from parasympathetic postganglionic fibers?
a) alpha
b) nicotinic
c) beta-2
COMPLETE QUESTIONS AND CORRECT ANSWERS |
VERIFIED ANSWERS | JUST RELEASED | UPDATED
VERSION
In skeletal muscle cells, for which of the following is ATP needed?
a) to allow troponin to bind to tropomyosin
b) to move calcium back into the ECF
c) to allow myosin to detach from actin
d) to move calcium from its storage site into the muscle cell's cytoplasm
e) more than one answer is correct ---------CORRECT ANSWER--------------
---to allow myosin to detach from actin
Creatine phosphate is used to convert:
a) ATP to ADP
b) deoxymyoglobin to myoglobin
c) lactic acid to pyruvic acid
d) pyruvic acid to lactic acid
e) ADP to ATP ---------CORRECT ANSWER-----------------ADP to ATP
,A contraction that generates force and moves a load is known as
____________, whereas one that generates force without movement is
known as ____________
a) isotropic/isometric
b) isometric/isotonic
c) isotonic/isometric
d) isotonic/isotropic
e) isotonic/isotonic ---------CORRECT ANSWER-----------------
isotonic/isometric
Which of the following does NOT affect the tension of in a whole
muscle?
a) twitch summation in individual fibers
b) varying the number of motor units used
c) motor unit recruitment
d) stimulating variable portions of each motor unit
e) variation in the frequency of action potentials stimulating each
muscle fiber ---------CORRECT ANSWER-----------------stimulating variable
portions of each motor unit
,weightlifting can result in a dramatic increase in skeletal muscle mass.
This increase in muscle mass is primarily attributable to which of the
following?
a) increase in skeletal muscle blood supply
b) increase in number of motor neurons
c) increase in the number of neuromuscular junctions
d) synthesis of more contractile proteins
e)increase in the number of muscle fibers ---------CORRECT ANSWER-----
------------synthesis of more contractile proteins
Which pair is MISMATCHED?
a) fast-glycolytic fiber - produces the most lactic acid
b) slow-oxidative fiber - is high in myoglobin
c) slow-oxidative fiber - most readily fatigues
d) fast-glycolytic fiber - has high myosin-ATPase activity
e) more than one answer applies ---------CORRECT ANSWER-----------------
slow-oxidative fiber - most readily fatigues
Why are interneurons needed as part of the withdrawal reflex?
a) The neurotransmitter from he afferent neuron will never match the
receptors on the efferent neuron
, b) it is a way to slow down the response
c) it allows for the flexor to contract and the extensor to relax in
response to the same afferent info
d) two of the above are correct
e) all of the above are correct ---------CORRECT ANSWER-----------------it
allows for the flexor to contract and the extensor to relax in response
to the same afferent info
In response to stepping on a nail, the crossed-extensor reflex causes:
a) flexion of the leg on the side of receptor activation
b) extension of the leg on the side of receptor activation
c) extension of the leg opposite the side of receptor activation
d) flexion of the leg opposite the side of receptor activation
e) extension of the arm on the side of receptor activation ---------
CORRECT ANSWER-----------------extension of the leg opposite the side of
receptor activation
Which type of autonomic receptor binds with the neurotransmitter
released from parasympathetic postganglionic fibers?
a) alpha
b) nicotinic
c) beta-2
