Can a reflex action be controlled?

Involuntary and almost instantaneous reaction in response to a stimulus is known as reflex motion. The spinal cord is the primary control centre for reflex behaviour. The spinal cord connects the brain and the spinal nerves. So we can say that, reflex arc is controlled by the spinal cord.

Which controls reflex actions?

The spinal cord acts as the main centre for reflex actions. The spinal cord acts as a link between spinal nerves and the brain.

Why is reflex action not controlled by the brain?

It is because most sensory neurons do not pass directly into the brain but synapse in the spinal cord which allows reflex actions to occur relatively quickly by activating spinal motor neurons without the delay of routing signals through the brain, although the brain receives sensory input while the reflex action …

Is reflex action controlled by heart?

Reflex action is controlled by the heart – false It acts on an impulse even before it reaches the brain. Immediately, the spinal cord sends back signals to the muscle through the motor neuron.

Why are reflexes controlled by the spinal cord?

A reflex arc is a neural pathway that controls a reflex. In vertebrates, most sensory neurons do not pass directly into the brain, but synapse in the spinal cord. This allows for faster reflex actions to occur by activating spinal motor neurons without the delay of routing signals through the brain.

Is blinking a reflex action?

The eye blink reflex elicited by an external stimulus such as a loud noise or flash of light or a tap on the forehead is an involuntary response. It is distinguishable in latency and amplitude from spontaneous blinks and blinks made under voluntary or conscious control.

Which part of the brain controls reflex actions such as eye blinking?

In a reflex action, the spinal cord along with the brain stem is responsible for the reflex movements. A few examples of reflex action are: When light acts as a stimulus, the pupil of the eye changes in size. Sudden blinking when an insect comes very near to the eyes.

Is breathing a reflex action?

Processes such as breathing, digestion, and the maintenance of the heartbeat can also be regarded as reflex actions, according to some definitions of the term.

Can we override reflexes?

The body can be trained to override that reflex. An unconscious body (or even drunk or drugged bodies) will not exhibit the reflex.

Which reflexes are controlled by brain?

There are two types: autonomic reflex arc (affecting inner organs) and somatic reflex arc (affecting muscles). Autonomic reflexes sometimes involve the spinal cord and some somatic reflexes are mediated more by the brain than the spinal cord.

Is sneezing a reflex action?

Sneezing is a protective reflex, and is sometimes a sign of various medical conditions. Although sneezing is a protective reflex response, little else is known about it. A sneeze (or sternutation) is expulsion of air from the lungs through the nose and mouth, most commonly caused by the irritation of the nasal mucosa.