Lecture 10 : Simple Reflexes

Question 1

What is a reflex

Answer 1

Stereotyped (same in any given situation, consistent), involuntary reactions of CNS to specific sensory inputs

Has a rapid response

Somatic and autonomic

Question 2

Functions of reflex

Answer 2

Protective (limb withdrawal)
Postural control (walking, etc)
Homeostasis (BP stability)

Question 3

Reflex Arc

Answer 3

Question 4

What are interneurons

Answer 4

Acts as a middle link between sensory and motor neurons, essentially integrating different neurons

Found only in CNS

Question 5

Enteric Nervous System

Answer 5

Question 6

Efferent Neurones

Answer 6

Carry signals from CNS to body, telling effector what to do, ie. Motor neurones that innervate effectors

Question 7

What is a simple stretch reflex, how do proprioceptors work?

Answer 7

Reflex responding to muscle stretch, maintaining posture.

Monitored by sensory receptors called proprioceptors, which include muscle spindles and golgi tendon organs

Question 8

Knee Jerk Reflex

Answer 8

Question 9

Golgi tendon organ summary

Answer 9

Question 10

Inverse myotatic reflex (basically golgi tendon reflex)

Answer 10