BioLab exam 2
The function of the neuromuscular junction is to ________.
convey an impulse from the nervous system to skeletal muscle
This strong, cord-like structure attaches muscles to bones.
A neuron and all the muscle fibers it stimulates is called a ________.
The actual contractile units of muscles extend from Z disc to Z disc. They are ________.
Acetylcholine (Ach) is the neurotransmitter of axon terminals at the neuromuscular junction. It ________.
diffuses across the synaptic cleft, binds to receptors on the muscle membrane, and ultimately causes the muscle to depolarize and contract
The dark band of skeletal muscle results from the alignment of ________.
This contractile protein forms the thin filaments.
Tendons differ from ligaments in that ________.
tendons bind muscle to bone and ligaments bind bone to bone
The space between the axon terminal and the sarcolemma of a muscle fiber is called the ________.
Sensory or afferent neurons are typically of this type.
Oligodendrocytes form myelin around ________.
Cerebrospinal fluid formed in the lateral ventricles travels through the ________ to reach the third ventricle.
The precentral gyrus ________.
is a major motor area of the brain
Somatosensory functions are carried out in this part of the spinal cord.
dorsal columns and horns
The lacrimal apparatus produces a watery solution known as ________.
Many older individuals develop presbyopia, a condition in which ________.
the near point of accommodation becomes further away
The ciliary body is a modified part of this tunic (layer) of the eyeball.
A cataract is ________.
a change in the lens, rendering it hard and opaque
This structure, present in the cow eye but not in the human eye, is an iridescent, special reflecting surface that helps animals to see in low light conditions.
The inner layer of the retina ________.
is a transparent neural layer
BioLab exam 2