T/F: there are three types of muscle tissue found in the body
true
T/F: smooth and cardiac muscle tissue are both under voluntary
... [Show More] control
false
T/F: the musculocutaneous nerve is part of the central nervous system
false (is the peripheral nerve)
T/F: a motor signal is a signal that is sent from a muscle to the central nervous system
false
T/F: the cervical plexus contains nerve that innervate the thigh
false
tendons connect which type of tissue?
connect muscle to bone
acetylcholine is what type of substance?
neurotransmitter
during a muscle contraction which protein myofilament is pulled along?
actin
what is the name of the thick myofilament?
myosin
what must occur for a muscle contraction to stop?
calcium ions must be pumped back into the sacroplasmic reticulum
Your patient sustained an injury to their facial nerve (CN VII). Which actions would be impaired?
Orbicularis oculi and frontalis
Your patient is in a seated position with his feet flat on the floor. He is having difficulty lifting his toes off the floor. What muscle(s) is impaired from contracting?
tibialis anterior and extensor digitorum longus
A person sustained a back injury to the muscle group closest to the spine.
spinalis
T/F: when a muscle contracts, the M lines within a sarcomere come closer together towards the Z line
false
T/F: the A band contains thin filaments
true
what muscle contracts to enable the main effort required to stand on your toes?
gastrocnemius
when gluteus maximus contracts, which bone is pulled posteriorly by this muscle?
femur
when flexor digitorum profounds contracts, what action(s) occurs?
wrist flexion and flexion of digits 2-5
contraction of ________ results in ________?
psoas major, hip flexion
when superior gemellus contracts, what action(s) will not occur at the hip?
internal rotation and flexion
describe how acetylcholine, sodium ions and calcium ions work together to enable a muscle contraction.
Acetylcholine releases sodium ions when disrupted since it is a neurotransmitter, and calcium ions also get released and though calcium ions need to regroup in into the sacroplasmic reticulum to stop a muscle contraction, when it does not it causes the contraction to prolong. [Show Less]