Answers & Explanations 2026
Name the three types of muscle tissue found in the body
cardiac, smooth, and skeletal
What does it mean that skeletal muscles are under conscious control?
a person can consciously decide to use these muscles to complete an action
What is included in the central nervous system?
brain and spinal cord
Describe a motor action vs. sensory input
motor actions the central nervous system sends an impulse to the muscle; sensory input is when the
nerves carry information from the external environment
True or False. The brachial plexus supplies nerves to the lower extremities
False
What is the difference between tendons and ligaments?
Tendons connect skeletal muscle to bone; Ligaments connect bone to bone and stabilize joints where
bones meet
Describe the origin and insertion of attachment to bones
The origin is the bony site of attachment which is stationary during movement; the insertion is the bony
site of attachment that is moved by the muscle contraction
Describe muscle action and innervation
the action of the muscle is what effect is produced by the muscle's contraction; the innervation is the
peripheral nerve that supplies a muscle with the message from the brain
Your patient has damage to bilateral facial nerves ( CN VII), name at least three muscles that would be
impaired
Any of these: orbicularis oculi, orbicularis oris, zygomaticus major/minor, risorius, frontalis, and
buccinator
Your patient is having difficulty with scapular retraction, name two muscles that are most likely
involved with this limitation
trapezius and rhomboids (major/minor)
Your patient injured her ankle playing soccer. she sustained injuries to the tendons of peroneus
longus and peroneus brevis; what actions would be impaired due to this injury?