Bio250 Exam Questions with Accurate Solutions
How is aerobic respiration different from anaerobic fermentation? - ANSWER aerobic
respiration produces more ATP per glucose molecule
the deltoid muscle has multiple actions. select four of its actions from the list below. - ANSWER
-laterally rotates arm
-abducts arm
-flexes arm
-medially rotates arm
prime mover - ANSWER produces most of the force
synergist - ANSWER aids the prime mover in a number of possible ways
antagonist - ANSWER opposes the prime move; exerts a braking action
fixator - ANSWER holds a bone steady
which muscle extends the elbow? - ANSWER triceps brachii
what do fasciae separate? - ANSWER -muscles from skin
-adjacent muscles
-muscle compartments
the biceps brachii and brachialias both perform which of the following actions? - ANSWER flex
the elbow
how many muscles make up the hamstring group of muscles? - ANSWER 3
,what are the end products of aerobic respiration in skeletal muscles? - ANSWER -water
-carbon dioxide
what is the action of the biceps brachii? - ANSWER supination of forearm; flexes elbow
which term refers to the fibrous sheets of connective tissue that separate muscles from skin,
and separate groups of muscles into muscle compartments? - ANSWER fascia
what is the action of the triceps brachii? - ANSWER extends the elbow
the biceps brachii, brachialias, triceps brachii, and pronator trees are all muscles that act on
which part of the body? - ANSWER forearm
what is the major action of the hamstring muscles? - ANSWER knee flexion
true or false: the hamstrings are the major extensors of the knee? - ANSWER false
what are the actions of the quadriceps femoris? - ANSWER -extension of knee
-flexion of hip
name the neurotransmitter released at the neuromuscular junction. - ANSWER acetylcholine
what type of filament is indicated by the arrow? - ANSWER thick filament
put these stages of muscle activity in order, starting with what happens first. - ANSWER -
electrical excitation of the muscle fiber
-excitation-contaction coupling
, -contraction
-relaxation
which of the following best describes a muscle twitch? - ANSWER the smallest possible
contraction
a muscle that is acting as a synergist during a joint action may do which of the following? -
ANSWER -contract together with the prime mover to produce more power
-stabilize a joint to restrict undesirable movements of a bone
-modify the direction of the movement produced by the prime mover
because myofilaments side across each other during contraction, the mechanism of muscle
contraction is called___________filament model. - ANSWER sliding
what is a muscle fascicle? - ANSWER a bundle of muscle fibers surrounded by connective tissue
during flexion, the triceps brachii acts as a(n) ________of the biceps brachii and brachialias
muscles because it opposes the action - ANSWER antagonist
what is a Motor unit? - ANSWER a single motor neuron and all of the muscle fibers it controls
what are the actions of the gluteus Maximus? - ANSWER -extends hip joint
-abducts thigh
the_______reticulum serves as a reservoir for calcium ions in skeletal muscle cells - ANSWER
sarcoplasmic
what is the major action of the gastrocnemius muscle? - ANSWER plantar flexion of the foot
How is aerobic respiration different from anaerobic fermentation? - ANSWER aerobic
respiration produces more ATP per glucose molecule
the deltoid muscle has multiple actions. select four of its actions from the list below. - ANSWER
-laterally rotates arm
-abducts arm
-flexes arm
-medially rotates arm
prime mover - ANSWER produces most of the force
synergist - ANSWER aids the prime mover in a number of possible ways
antagonist - ANSWER opposes the prime move; exerts a braking action
fixator - ANSWER holds a bone steady
which muscle extends the elbow? - ANSWER triceps brachii
what do fasciae separate? - ANSWER -muscles from skin
-adjacent muscles
-muscle compartments
the biceps brachii and brachialias both perform which of the following actions? - ANSWER flex
the elbow
how many muscles make up the hamstring group of muscles? - ANSWER 3
,what are the end products of aerobic respiration in skeletal muscles? - ANSWER -water
-carbon dioxide
what is the action of the biceps brachii? - ANSWER supination of forearm; flexes elbow
which term refers to the fibrous sheets of connective tissue that separate muscles from skin,
and separate groups of muscles into muscle compartments? - ANSWER fascia
what is the action of the triceps brachii? - ANSWER extends the elbow
the biceps brachii, brachialias, triceps brachii, and pronator trees are all muscles that act on
which part of the body? - ANSWER forearm
what is the major action of the hamstring muscles? - ANSWER knee flexion
true or false: the hamstrings are the major extensors of the knee? - ANSWER false
what are the actions of the quadriceps femoris? - ANSWER -extension of knee
-flexion of hip
name the neurotransmitter released at the neuromuscular junction. - ANSWER acetylcholine
what type of filament is indicated by the arrow? - ANSWER thick filament
put these stages of muscle activity in order, starting with what happens first. - ANSWER -
electrical excitation of the muscle fiber
-excitation-contaction coupling
, -contraction
-relaxation
which of the following best describes a muscle twitch? - ANSWER the smallest possible
contraction
a muscle that is acting as a synergist during a joint action may do which of the following? -
ANSWER -contract together with the prime mover to produce more power
-stabilize a joint to restrict undesirable movements of a bone
-modify the direction of the movement produced by the prime mover
because myofilaments side across each other during contraction, the mechanism of muscle
contraction is called___________filament model. - ANSWER sliding
what is a muscle fascicle? - ANSWER a bundle of muscle fibers surrounded by connective tissue
during flexion, the triceps brachii acts as a(n) ________of the biceps brachii and brachialias
muscles because it opposes the action - ANSWER antagonist
what is a Motor unit? - ANSWER a single motor neuron and all of the muscle fibers it controls
what are the actions of the gluteus Maximus? - ANSWER -extends hip joint
-abducts thigh
the_______reticulum serves as a reservoir for calcium ions in skeletal muscle cells - ANSWER
sarcoplasmic
what is the major action of the gastrocnemius muscle? - ANSWER plantar flexion of the foot
