Tag: divisions of nervous system

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

Match the column I with column II and select the correct option.

Column I Column II
A. Myenteric plexusB. Argentaffin cellsC. Meissner's plexusD. Liver (i) Produce serotonin(ii) Controls peristalsis(iii) Secretes heparin(iv) Secretion of intestinal juice

  1. A - (ii), B - (i), C - (iv), D - (iii)

  2. A - (iv), B - (iii), C - (i), D - (ii)

  3. A - (ii), B - (i), C - (iii), D - (iv)

  4. A - (iii), B - (iv), C - (i), D - (ii)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  • Myenteric plexus is also called as Auerbach's plexus, they are nerve cells and are controlled by the parasympathetic nervous system. It controls peristalsis (Swallowing of food).
  • Argentaffin cells are present at the lining of the gastrointestinal tract and perform the function of secretion thus produces serotonin.
  • Meissner's plexus is also called as submucosal plexus, it is located on the lining of the mucosa. It is responsible for the secretion of intestinal juice.
  • The liver also called as 'Hepar' that contains hepatic cells. These hepatic cells are responsible for the secretion of heparin.
  • So, the correct option is 'A - (ii), B - (i), C - (iv), D - (iii)'.

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

Sight of delicious food usually makes mouth watery, it is a

  1. Hormonal response

  2. Neural response

  3. Optic response

  4. Olfactory response
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The sense of smell and sight of food are governed by olfactory and optic responses which work together to initiate the neural response during cephalic phase of digestion. Sight, smell and sense of food initiate the neural response in which central nervous system prepares the stomach to receive food. The responses include salivation and secretion of gastric juices. This makes options C and D incorrect and option B correct. The ingestion of food stimulates the hormonal responses to food which includes endocrine system to ensure releases of various digestive hormones at appropriate time. Correct answer is B.

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

Sympathetic nerves in mammals arise from

  1. Sacral region

  2. Cervical region

  3. Thoraco-lumbar region
  4. $3^{rd}, 7^{th}$ and $9^{th}$ and $10^{th}$ cranial nerves
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The sympathetic system is the system which mainly controls the involuntary actins. There are two kinds of neurons involved in the transmission of any signal through the sympathetic system: pre-ganglionic and post-ganglionic. The shorter preganglionic neurons originate from the thoracolumbar region of the spinal cord (levels $T _1$-$L _2$). So, the correct answer is option C.

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

State true or false. Correct false statements.
Empathy and sympathy are synonyms.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Empathy involves understanding and sharing another person's feelings from their perspective, whereas sympathy involves feelings of pity or sorrow for someone else's misfortune. They are related emotional responses but distinct concepts, making them not true synonyms.

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

White matter is composed of 

  1. Ependyma

  2. Nerve cells

  3. Nerve fibres

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

The tissue of the brain and spinal cord, consisting mainly of nerve fibres with their myelin sheaths is the white matter, that transmit signals from one region of the cerebrum to another and between the cerebrum and lower brain centres. In contrast, the darker tissue of the brain and spinal cord, consisting mainly of nerve cell bodies and branching dendrites is the grey matter. The function of grey matter is to route sensory or motor stimuli to interneurons of the CNS in order to create a response to the stimulus through chemical synapse activity.
So, the correct answer is option C.

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

Sympathetic nerves in mammals arise from

  1. Sacral region

  2. Cervical region

  3. Thoracolumbar region
  4. 3$^{rd}$, 7$^{th}$, 9$^{th}$ and 10$^{th}$ cranial nerves
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Sympathetic nerves are composed of efferent fibres derived from the thoracic and lumbar regions of the spinal cord. It activates the involuntary action. It is also known as fight or flight. The post ganglion which originates from the sympathetic chain innervates the effector organ and effect it. So, the correct answer is option C.
Multiple choice biology nervous system of man divisions of nervous system autonomic nervous system the human brain

Function of sympathetic nervous system is to

  1. Decrease heart beat

  2. Increase heart beat

  3. Contract respiratory organ

  4. Secrete saliva
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The sympathetic nervous system deals with the response to stress and danger, releasing epinephrines (adrenaline), and in general, increasing activity and metabolic rate. So, due to sympathetic stimulation, heart rate increases, to provide body more and more oxygen and nutrients.