What is the correct choice? 3) In the vertebrate spinal stretch reflex, the sensor is the...

What is the correct choice?

3) In the vertebrate spinal stretch reflex, the sensor is the

a. alpha motor neurons.

b. extrafusal muscle fibers.

c. gamma motor neurons.

d. mechanoreceptors in the spindle

Expert Solution

The correct answer is option (D). Mechanoreceptors in the spindle act as sensors for the spinal stretch reflex. They are the sensory cells which detect any mechanical distortion. As the muscle increases in length, the activity of alpha motor neurons increases. This causes contraction of muscle fibers . The gamma motor neurons cause relaxation or tightening of muscle spindles by detecting how sensitive the reflex is. The receptor is actually tendon glogi receptor that lies in the tendon along the muscle.

gladiator answered 2 years ago

Describe information processing that occurs with the knee jerk spinal reflex.

"Describe the steps involved in the monosynaptic stretch reflex and the reciprocal inhibition" and adds. "You...

"Describe the steps involved in the monosynaptic stretch reflex and the reciprocal inhibition" and adds. "You are welcome to use this patellar reflex to illustrate your point"

1.) Multiple Choice: Choose the correct letter choice. What is the correct sequence of instructions for...

1.) Multiple Choice: Choose the correct letter choice. What is the correct sequence of instructions for carrying out the calculation (A * B) - (A * C) on Stack Architecture. Assume that: A, B, C and D are memory locations R1, R2, R3 are registers. MUL multiplies 2 operands and stores the result in the first operand in a 2 operand case multiplies the second and third operands and stores the result in the first in a 3 operand case...

How does stretch cause smooth muscle contraction (myogenic reflex)? Describe the molecular mechanism.

Fully describe the events that occur within the monosynaptic muscke spindle stretch reflex. ( must include...

Fully describe the events that occur within the monosynaptic muscke spindle stretch reflex. ( must include specific anatomical structures and different types if neurons)

1,Diagram and describe a simple spinal reflex. Be sure to indicate all of the major components,...

1,Diagram and describe a simple spinal reflex. Be sure to indicate all of the major components, and explain what they do. Indicate how a spinal reflex could be more complex than this simple reflex, and explain why a reflex might have to be complex. Give at least two examples to illustrate your point (just brief descriptions). How does a cranial reflex differ from a spinal reflex? 2, Describe the structure of blood vessel walls. Be sure to include all classes...

Describe the most important specific reflex patterns of movement provided by spinal cord. (Explain in detail...

Describe the most important specific reflex patterns of movement provided by spinal cord. (Explain in detail and give examples)

Describe a spinal reflex. In your answer use the following terms: Somatic motor neuron, sensory neuron,...

Describe a spinal reflex. In your answer use the following terms: Somatic motor neuron, sensory neuron, ascending signal, thalmus, sensory cortex.

please draw a sequence diagram Basic package: 6 window sensor, 3 door sensor, 1 motion sensor,...

please draw a sequence diagram Basic package: 6 window sensor, 3 door sensor, 1 motion sensor, 1 glass sensor Basic Plus: 10 window sensor, 4 doors sensor, 2 motion sensor, 2 glass sensor Elite: 15- window sensor, 6 doors sensor, 3 glass sensor All packages will also include an alarm system devices of a give package are with the alarm system. Customers have the option to disable a device. Customers can also armed or disarm the system. Customers would need...

Activity 3: Identify the parts of the spinal cord in spinal cord cross section model:

Activity 3: Identify the parts of the spinal cord in spinal cord cross section model: Spinal Cord Cross Section Parts Description / Function. Grey Matter White Matter Central Canal Dorsal Root Dorsal Root Ganglia Ventral Root Spinal Nerve

Question