Tag: nervous system of man

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Questions Related to nervous system of man

Multiple choice biology nervous system of man reflex action innate and learned behaviour coordination in human beings- chemical control

The reflex action was discovered by

  1. Marshall

  2. Best

  3. Taylor

  4. Pavlov
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • Involuntary actions in response to external or internal stimuli are termed as reflex actions. Peripheral nervous system and the spinal cord are involved in controlling the reflex actions. Here, the brain is not involved.
  • The reflex action was discovered by Marshall. He proposed the theory explaining the body's reflex, or involuntary, actions.
  • So, the correct answer is 'Marshall'.
Multiple choice biology nervous system of man reflex action innate and learned behaviour coordination in human beings- chemical control

Which of the following best characterize the simple response to simple stimuli?

  1. Simple reflex

  2. Complex reflex

  3. Fixed action patterns

  4. Behavioral cycles

  5. Environmental rhythms
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  • A stimulus is anything that can be perceived by a given organism including sight, sound, touch, smell, taste, etc.
  •  A response is generally characterized as the behaviour proximal to the stimulus. So if a bell rings and a person jumps the stimulus is the bell and the response is the jump. 
  • The ability of an organism or organ to respond to external stimuli is called sensitivity. When a stimulus is applied to a sensory receptor, it normally influences by a simple reflex. Hence, Simple reflex is best to characterize the simple response to simple stimuli. 
So, the correct answer is 'Simple reflex'.

Multiple choice biology nervous system of man reflex action innate and learned behaviour coordination in human beings- chemical control

In reflex action, the reflex is formed by

  1. Brain- spinal cord- muscles

  2. Receptor- spinal cord- muscles

  3. Muscles- receptors- brain

  4. Muscles- spinal cord- receptor
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A reflex arc consists of a receptor (detects stimulus), a sensory neuron, an integration center (spinal cord), a motor neuron, and an effector (muscles).

Multiple choice biology nervous system of man reflex action innate and learned behaviour coordination in human beings- chemical control

Which one is not a reflex action?

  1. Closing the eye lids suddenly

  2. Release of saliva

  3. Obeying the order

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The reflex action is defined as the sudden and involuntary movements that are controlled directly by the spinal cord. These actions do not require memory generation most of the time, like blinking of the eyes when something comes close to them. These are called the unconditional reflexes. Some reflex actions may involve learning and these are call the conditional reflexes. For example release of saliva at the sight of the food. Obeying the orders is the voluntary set of actions performed under the command of the somatic nervous system. It involves memory generation so as to remember the tasks and voices.

Hence, the correct answer is 'Obeying the order'

Multiple choice biology nervous system of man reflex action innate and learned behaviour coordination in human beings- chemical control

Reflex  action (withdrawal of hand from heat source) is controlled by

  1. Sympathetic nervous system

  2. Autonomic nervous system

  3. Spinal cord

  4. Peripheral nervous system

  5. Craniosacral outflow
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Simple withdrawal reflexes, such as pulling a hand away from a hot object, are mediated by the spinal cord to ensure the fastest possible response time.

Multiple choice biology nervous system of man reflex action innate and learned behaviour coordination in human beings- chemical control

A simple reflex is ___________________.

  1. Climbing up a stair in dark without stumbling

  2. Closing of eyes when strong light is flashed over them

  3. Tying shoe laces while talking to some person

  4. Watering of mouth at sight of favourite food
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Closing eyes in response to bright light is a classic example of a simple, involuntary reflex action designed to protect the eyes.