GENERAL HISTOLOGY

INTRODUCTION

CELL STRUCTURE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Reflexes are rapid, unlearned, ____ actions.
A
voluntary
B
involuntary
C
sensitive
D
controlled
Explanation: 

Detailed explanation-1: -A reflex is a rapid, unlearned, involuntary (automatic) response to a stimulus (change in the environment). Reflexes are responses that protect the body from potentially harmful events that require immediate action. They involve relatively few neurons (nerve cells) so that they can occur rapidly.

Detailed explanation-2: -Reflex activity Inborn reflexes are rapid, predictable motor responses to stimuli. They are unconscious, unlearned, and involuntary. These reflexes help avoid pain, maintain posture, and control visceral activities. Contacting a hot surface causes an instantaneous inborn spinal reflex, and the hand from the surface.

Detailed explanation-3: -A reflex is an involuntary (say: in-VAHL-un-ter-ee), or automatic, action that your body does in response to something-without you even having to think about it.

Detailed explanation-4: -A reflex action is an automatic (involuntary) and rapid response to a stimulus, which minimises any damage to the body from potentially harmful conditions, such as touching something hot. Reflex actions are therefore essential to the survival of many organisms.

Detailed explanation-5: -Involuntary actions take place without the conscious choice of an organism. Reflex actions are those actions that take place along with stimuli. These actions are controlled by the medulla oblongata or the midbrain. These actions are controlled by the spinal cord.

There is 1 question to complete.