What is the name of the small space between the axon terminal of the neuron and the Sarcolemma of the muscle fiber?

Synaptic cleft
Synaptic cleft – the space between the axon terminal (synaptic end bulb) and the sarcolemma (motor end plate) Page 11 Neuromuscular Junction It is the the region formed by the axon terminal of the motor neuron and the motor end plate of the muscle fiber.

What is the gap between the axon terminal of a motor neuron?

In fact, the synaptic cleft between an axon terminal and muscle cell is called a neuromuscular junction. This is because the neuromuscular junction is a specialized type of synaptic cleft that transmits signals from a neuron to muscle cells, causing muscle contraction.

What is the space between the axon terminal and the motor end plate?

neuromuscular junction
A neuromuscular junction is the junction between the axon terminal of a motor neuron and the plasma membrane of the motor end plate of a muscle fiber. With the arrival of an action potential to the axon terminal, voltage-dependent calcium channels open, and calcium infuses into the cell.

Why is the innervation ratio in the ocular muscles one motor axon per 23 muscle fibers whereas in the gastrocnemius muscle it is one motor axon per 1000 muscle fibers?

myofibrils. Why is the innervation ratio in the ocular muscles one motor axon per 23 muscle fibers, whereas in the gastrocnemius muscle it is one motor axon per 1000 muscle fibers? There are more nerves in the upper body than in the lower extremities. The ocular muscles require finer control than moving the legs.

What is the space between the synaptic terminal and the muscle fiber?

First, there is a distinct separation between the presynaptic and the postsynaptic membrane. The space between the two is known as the synaptic cleft.

What is the space between the synaptic knob and the muscle fiber?

Between the synaptic end bulbs of the neuron and the cell membrane of the muscle fiber (the sarcolemma) lies a space known as the synaptic cleft, which is the final component of the neuromuscular junction.

What does the synaptic gap do?

The synaptic cleft, also known as the synaptic gap, is the space in between the axon of one neuron and the dendrites of another and is where the electrical signal is translated to a chemical signal that can be perceived by the next neuron.

What is the purpose of the gap between motor neurons and Myofibers?

Motor neurons secrete acetylcholine to trigger contraction of skeletal muscle. Cardiac and smooth muscle cells utilize gap junctions to transmit signals and coordinate contraction.

What is the smallest contractile unit of a muscle fiber?

sarcomeres
The smallest contractile unit of skeletal muscle is the muscle fiber or myofiber, which is a long cylindrical cell that contains many nuclei, mitochondria, and sarcomeres (Figure 1) [58].

Which muscles have small motor units?

The smallest motor units are in muscles that must produce very fine gradations of force:

• lumbricals: 100 fibers/unit.
• eye muscles: 5 fibers/unit.

What structure separates one fascicle from another?

Each fascicle is surrounded by another layer of connective tissue termed the endomysium. This structure separates and protects the muscle and also acts to spread force throughout the muscle, preventing damage.

What divides into synaptic end bulbs at neuromuscular junction?

At the NMJ, the end of the motor neuron, called the axon terminal, divides into a cluster of synaptic end bulbs. Suspended in the cytosol within each synaptic end bulb are hundreds of membrane-enclosed sacs called synaptic vesicles.