Muscle 1
............. are described as voluntary, but even relaxed muscles are almost always slightly contracted, a phenomenon called muscle tone
Skeletal muscles
primarily motor; main general sensory nerves of the face. mixed nerve
trigeminal
Muscle contraction depends on.................
Muscle contraction depends on the myosin- and actin-containing myofilaments.
carry sensory impulses from the taste buds of anterior two-thirds of the tongue
facila
.............. contain motor (efferent) fibers that arise from ventral horn motor neurons and extend to and innervate the skeletal muscles
Ventral roots
............are those in which the muscle shortens and does work, such as picking up a book or kicking a ball
Concentric contractions
transmit visual impulses from the retina to the thalamus.
optic
are those in which the muscle generates force as it lengthens, are equally important for coordination and purposeful movements.
eccentric contraction
The phrenic nerve branches from this plexus
cervical plexus
........ contain sensory (afferent) fibers that arise from sensory neurons in the dorsal root ganglia and conduct impulses from peripheral receptors to the spinal cord.
Dorsal roots
isotonic contractions come in two “flavors” those are
concentric and eccentric.
transmit visual impulses from the retina to the thalamus.
lumbar plexus
What is the role of tropomyosin in skeletal muscles--
blocking the myosin binding sites on the actin molecules.
like interoceptors, respond to internal stimuli. However, their location is much more restricted. Proprioceptors occur in skeletal muscles, tendons, joints, and ligaments and in connective tissue coverings of bones and muscles.
Propriocepter
............... branches off the medial cord of the plexus. It descends along the medial aspect of the arm toward the elbow, swings behind the medial epicondyle, and then follows the ulna along the medial forearm.
The ulnar nerve
If the muscle tension developed overcomes the load and muscle shortening occurs, the contraction is an
isotonic contraction
Meissner’s corpuscles
tactile corpuscle
stores oxygen in muscle cells-
myoglobin
............are fast adapting
phasic receptors
........... is a state of physiological inability to contract even though the muscle is still receiving stimuli.
muscle fatigue
The cells that rely mostly on the oxygen-using aerobic pathways for ATP generation are
oxidative fibers
is the ability to take in the scene around us and recognize a familiar pattern, an unfamiliar one, or one that has special significance for us.
Pattern recognition
Those that rely more on anaerobic glycolysis and creatine phosphate are
glycolytic fibers.
...... is the ability to detect that a stimulus has occurred
Perceptual detection
When blood flow and oxygen delivery are impaired during vigorous muscle contraction, most of the pyruvic acid is converted into ..............., and the overall process is referred to as anaerobic glycolysis.
lactic acid