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CBNS 124 Final Exam Questions & Answers 2024/2025 $8.49   Add to cart

Exam (elaborations)

CBNS 124 Final Exam Questions & Answers 2024/2025

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CBNS 124 Final Exam Questions & Answers 2024/2025 The somatic motor system uses which type of muscle? a) Skeletal muscle b) Cardiac muscle c) Smooth muscle d) All of the above - ANSWERSa) Skeletal muscle Which type of muscle is a flexor? a) Those that open the joint b) Biceps brachii ...

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  • September 28, 2024
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  • 2024/2025
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  • Questions & answers
  • CBNS 124
  • CBNS 124
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CBNS 124 Final Exam Questions &
Answers 2024/2025

The somatic motor system uses which type of muscle?

a) Skeletal muscle

b) Cardiac muscle

c) Smooth muscle

d) All of the above - ANSWERSa) Skeletal muscle



Which type of muscle is a flexor?

a) Those that open the joint

b) Biceps brachii

c) Triceps

d) Anconeus - ANSWERSb) Biceps brachii



Which type of skeletal muscle is important for posture and movements of the trunk?

a) distal muscles

b) axial muscles

c) proximal muscles

d) the same ones that control locomotion - ANSWERSb) axial muscles



A motor unit refers to

a) one motor neuron and all the muscle fibers that it innervates

b) all the muscle fibers and the innervating motor neurons for a whole muscle

c) all the motor neurons in the cervical and lumbosacral enlargement

d) all the motor neurons and muscles fibers in one motor neuron pool - ANSWERSa) one motor neuron
and all the muscle fibers that it innervates

, The maximum tension that a muscle can generate is most DIRECTLY dependent on Contraction proceeds
from excitation when

a) the number of cross bridges formed between actin and myosin

b) depolarization of the muscle fiber

c) Intracellular Ca2+ levels

d) Safety factor in muscle fiber action potential firing - ANSWERSa) the number of cross bridges formed
between actin and myosin



What biochemical event provides excitation-contraction coupling?

a) muscle action potential

b) increase in muscle intracellular Ca2+

c) activation of nicotinic acetylcholine receptors

d) motor neuron action potential

e) all of the above are correct - ANSWERSb) increase in muscle intracellular Ca2+



Increased firing of action potentials in a single motor neuron produces twitch summation through the
process of

a) Temporal summation

b) Spatial summation

c) Safety factor

d) End-plate potential - ANSWERSa) Temporal summation



What causes Myasthenia Gravis?

a) disordered axoskeleton

b) reduced acetylcholine production

c) reduced number of nicotinic acetylcholine receptors

d) reduced acetylcholinesterase - ANSWERSc) reduced number of nicotinic acetylcholine receptors



Which statement is CORRECT for the muscle spindle reflex

a) Increasing muscle length leads to decreased in Group Ia proprioceptive fibers

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