Simple Reflexes

Question 1

What are neural reflexes?

Answer 1

Stereotyped, involuntary, rapid reactions of the CNS to specific sensory input

Question 2

General functions of reflexes

Answer 2

• Protective
• Postural control
• Homeostasis

Question 3

General reflex arc steps

Answer 3

• Sensory receptor
• Afferent
• (Integration)
• Efferent
• Effector

Question 4

What reflexes control posture and how?

Answer 4

• Simple stretch reflexes (myotatic)
• Adjust degree of skeletal muscle contractions

Question 5

What are the sensory receptors for simple stretch reflexes?

Answer 5

Proprioceptors

Question 6

Types of proprioceptors

Answer 6

• Muscle spindles
• Golgi tendon organs

Question 7

Where are muscle spindles found?

Answer 7

Skeletal muscle

Question 8

Are muscle spindles monosynaptic or polysynaptic?

Answer 8

Monosynaptic (no interneurone)

Question 9

How do muscle spindles prevent damage to muscle?

Answer 9

As muscle is stretched they cause it to contract, so it doesn’t tear

Question 10

Where are the nerve endings of golgi tendon organs found?

Answer 10

Tendons

Question 11

Are golgi tendon organs monosynaptic or polysynaptic?

Answer 11

Polysynaptic (have interneurone)

Question 12

What type of interneurone do golgi tendon organs have?

Answer 12

Inhibitory

Question 13

How do golgi tendon organs prevent damage to muscle?

Answer 13

As tendon is stretched to max, inhibitory interneurone stops contraction and activity stops

Question 14

What type of reflex does a golgi tendon organ use?

Answer 14

Reverse myotatic reflex