BIO 167 LAB EXAM 2 QUESTIONS AND ACCURATE ANSWERS 2024/2025 |
VERIFIED
Dorsiflextion or extension of the great toe is expected during the planar reflex test. - ✔️✔️false
In which area of the muscle is that the signal from the nervous system is transmitted into it? - ✔️✔️The
neuromuscular junction
What reaction is observed during the triceps reflex? - ✔️✔️Extension of the elbow
Interneurons are part of the central nervous system and they are involved in reflex arcs. - ✔️✔️True
What parts of the neuron transmits the outgoing signal to nearby cells? - ✔️✔️Axon terminals
If you were testing the plantar reflex by stroking the lateral aspect of the sole of the foot in an adult
which of the following would be a normal response? - ✔️✔️flexion of the toes downward
Which of the following lists the parts of a reflex arc in the correct sequence? - ✔️✔️receptor, sensory
neuron, interneuron, motor neuron, effector
In the Demonstrate Monosynaptic Reflexes Lab, why do the reflexes occur? Select all that apply. -
✔️✔️By triggering the tendon of a muscle you are initiating the reflex arc.
By triggering stretch receptors in the muscle you are initiating the reflex arc.
By triggering a skin receptor near the muscle you are initiating the reflex arc.
By triggering the muscle effector you are initiating the reflex arc.
The ________ of the reflex hammer is used to tap on tendons or ligaments. - ✔️✔️broad flat side
Which of the following areas can you use the broad flat side of the reflex hammer to test reflexes? -
✔️✔️patellar
calcaneal
triceps brachii
, In the shoulder elbow movement lab, this muscle is the prime mover for adduction of the arm at the
shoulder joint. - ✔️✔️pectoralis major
A muscle responsible to assist the movement of the prime mover is a - ✔️✔️synergist
In the shoulder elbow movement lab, this muscle is the antagonist for forearm flexion of the arm at the
elbow joint. - ✔️✔️triceps brachii
The thin myofibril filament of a sarcomere is composed of a protein - ✔️✔️actin
The highlighted muscle on the back of the arm in this cadaver is the - ✔️✔️triceps brachii.
As the magnitude of stimulation increases, the skeletal muscle will contract with ________ force due to
the ________ number of muscle fibers contracting. - ✔️✔️increased; increased
In the Shoulder elbow movement lab, this muscle is the prime mover for forearm flexion of the arm at
the elbow joint. - ✔️✔️brachialis
Skeletal muscles are composed of hundreds of ________, which contain ________. - ✔️✔️muscle fiber
cells; myofibrils
In the Shoulder elbow movement lab, this muscle is the prime mover for forearm extension of the arm
at the elbow joint. - ✔️✔️triceps brachii
What neurotransmitter is released at the neuromuscular junction when an action potential arrives at the
motor neuron terminal? - ✔️✔️acetylcholine (ACh)
The heart contracts because of an electrical impulse. Where in the heart does this impulse start? -
✔️✔️sinoatrial node
What ECG component corresponds to the time it takes for the ventricles to contract? - ✔️✔️ST segment
VERIFIED
Dorsiflextion or extension of the great toe is expected during the planar reflex test. - ✔️✔️false
In which area of the muscle is that the signal from the nervous system is transmitted into it? - ✔️✔️The
neuromuscular junction
What reaction is observed during the triceps reflex? - ✔️✔️Extension of the elbow
Interneurons are part of the central nervous system and they are involved in reflex arcs. - ✔️✔️True
What parts of the neuron transmits the outgoing signal to nearby cells? - ✔️✔️Axon terminals
If you were testing the plantar reflex by stroking the lateral aspect of the sole of the foot in an adult
which of the following would be a normal response? - ✔️✔️flexion of the toes downward
Which of the following lists the parts of a reflex arc in the correct sequence? - ✔️✔️receptor, sensory
neuron, interneuron, motor neuron, effector
In the Demonstrate Monosynaptic Reflexes Lab, why do the reflexes occur? Select all that apply. -
✔️✔️By triggering the tendon of a muscle you are initiating the reflex arc.
By triggering stretch receptors in the muscle you are initiating the reflex arc.
By triggering a skin receptor near the muscle you are initiating the reflex arc.
By triggering the muscle effector you are initiating the reflex arc.
The ________ of the reflex hammer is used to tap on tendons or ligaments. - ✔️✔️broad flat side
Which of the following areas can you use the broad flat side of the reflex hammer to test reflexes? -
✔️✔️patellar
calcaneal
triceps brachii
, In the shoulder elbow movement lab, this muscle is the prime mover for adduction of the arm at the
shoulder joint. - ✔️✔️pectoralis major
A muscle responsible to assist the movement of the prime mover is a - ✔️✔️synergist
In the shoulder elbow movement lab, this muscle is the antagonist for forearm flexion of the arm at the
elbow joint. - ✔️✔️triceps brachii
The thin myofibril filament of a sarcomere is composed of a protein - ✔️✔️actin
The highlighted muscle on the back of the arm in this cadaver is the - ✔️✔️triceps brachii.
As the magnitude of stimulation increases, the skeletal muscle will contract with ________ force due to
the ________ number of muscle fibers contracting. - ✔️✔️increased; increased
In the Shoulder elbow movement lab, this muscle is the prime mover for forearm flexion of the arm at
the elbow joint. - ✔️✔️brachialis
Skeletal muscles are composed of hundreds of ________, which contain ________. - ✔️✔️muscle fiber
cells; myofibrils
In the Shoulder elbow movement lab, this muscle is the prime mover for forearm extension of the arm
at the elbow joint. - ✔️✔️triceps brachii
What neurotransmitter is released at the neuromuscular junction when an action potential arrives at the
motor neuron terminal? - ✔️✔️acetylcholine (ACh)
The heart contracts because of an electrical impulse. Where in the heart does this impulse start? -
✔️✔️sinoatrial node
What ECG component corresponds to the time it takes for the ventricles to contract? - ✔️✔️ST segment
