Tag: nervous system of man

Quizzes (14) Questions (241)

Questions Related to nervous system of man

Multiple choice biology nervous system of man divisions of nervous system autonomic nervous system the human brain

An interneuron consists of the following

  1. Long dendrites and short axon

  2. Short dendrites and long and short axon

  3. Short dendrites and a long axon

  4. Long dendrites and a long axon
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Interneurons (also called association neurons) typically have short dendrites and axons that can vary in length, often acting as bridges between sensory and motor neurons.

Multiple choice biology nervous system of man divisions of nervous system autonomic nervous system the human brain

Which of the following pairs correctly identifies function of parasympathetic nervous system?

  1. Slows heart beat, promotes pancreatic secretion

  2. Increases secretion of sweat gland and intestinal gland

  3. Accelerates heart beat, dilates arteries

  4. Raises blood pressure, increases peristaltic activity.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Parasympathetic Nervous system: It is active during relaxing times, restoring normal activity after stress.
Sympathetic Nervous system: Active during stressful conditions, preparing the body to face them.
A. It is the function of parasympathetic nervous system.
B. Increase secretion of sweat gland by sympathetic nervous system and promote secretion of intestinal juice by parasympathetic nervous system.
C. Accelerates heart beat by sympathetic nervous system and dilates arteries by parasympathetic nervous system.
D. Raises blood pressure by sympathetic nervous system and increases peristaltic activity by parasympathetic nervous system.
So, the correct answer is 'Slows heart beat, promotes pancreatic secretion'.
Multiple choice biology nervous system of man divisions of nervous system autonomic nervous system the human brain

Which of the following is not an effect produced by parasympathetic stimulation?

  1. Pupil dilation

  2. Increased saliva

  3. Increased stomach activity

  4. Constriction of bronchi
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Dilation of the pupil is the function of the sympathetic nervous system. Parasympathetic stimulation causes: slowing down of the heartbeat; lowering of blood pressure; constriction of the pupils; decreased heart rate; salivation increase; peristalsis of the GI tract.

Multiple choice biology nervous system of man divisions of nervous system autonomic nervous system the human brain

Which one feature is correctly described?

  1. Salivary glands - secretes saliva - replication

  2. Pupil of the eyes - dilate - constricts- regulates entry of light

  3. Heart rate - decreases - tachycardia

  4. Intestinal peristalsis - stimulates - inhibits - heart rate
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The pupil is a hole or opening in the middle of the iris. Iris is the coloured part of the eye that controls the amount of light entering the eye by adjusting the size of the pupil (contraction and dilation). Salivary glands are associated with digestion while intestinal peristalsis moves the food through the intestine. Tachycardia refers to the presence of faster heart beat. So, the correct answer is option B.

Multiple choice biology nervous system of man divisions of nervous system autonomic nervous system the human brain

What are the sympathetic and parasympathetic nervous systems the part of?

  1. Brain

  2. Spinal cord

  3. Central nervous system

  4. Autonomous nervous system
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The sympathetic nervous system (SNS) is part of the autonomic nervous system (ANS), which also includes the parasympathetic nervous system (PNS).

So both sympathetic and parasympathetic nervous systems are the part of autonomous nervous system.
So the answer is 'Autonomous nervous system'. 

Multiple choice biology nervous system of man divisions of nervous system autonomic nervous system the human brain

Parasympathetic nervous system on stimulation bring about the functions, like

  1. Dilation of blood vessels

  2. Contraction of pupil and muscles of urinary bladder

  3. Contraction of walls of digestive tract

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Parasympathetic stimulation causes: slowing down of the heartbeat; lowering of blood pressure; constriction of the pupils; increased blood flow to the skin and viscera; salivation increase; peristalsis of the GI tract.

Multiple choice biology nervous system of man divisions of nervous system autonomic nervous system the human brain

The main functions of sympathetic nervous system are

  1. The contraction of skin blood vessels and sudden increase of blood pressure

  2. Contraction of muscles, secretion of sweat glands and rapid coagulation of blood

  3. Dilation of bronchi, contraction of heart and sudden decrease in the number of RBC in the blood

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

During the initial activation of the sympathetic system, norepinephrine gets released first as a preparatory hormone. This gets the body ready for the first stages of the emergency event. 

First, blood flow will increase to all essential tissues. This includes increased blood flow to the skeletal muscle, which will be needed to escape the situation and/or fight off the threat. 
Secondly, more oxygen will be needed to produce ATP (energy), so breathing rates will increase. 
Finally, glycogen, which is a storage form of glucose, will be broken down so that glucose molecules can be used for energy. These are the primary responses that will take place in the body when the sympathetic nervous system is activated.