Pneumotaxic centre which can moderate the functions of the respiratory rhythm centre is present at:
1. Pons region of brain
2. Thalamus
3. Spinal cord
4. Right cerebral hemisphere
Respiration is controlled by
1. medulla oblongata
2. cerebellum
3. hypothalamus
4. cerebrum
Consider the characters of a respiratory control center in humans:
I. It is located in pons
II. It moderates the functions of respiratory rhythm center
III. Its absence results in an increase in depth of respiration
The respiratory control center is:
1. Pneumotaxic center
2. Apneustic center
3. Chemosensitive zone
4. Dorsal group
Match the following columns and select the correct option:
Column I | Column II | ||
(a) | Pneumotaxic Centre | (i) | Alveoli |
(b) | O2 Dissociation curve | (ii) | Pons region of the brain |
(c) | Carbonic Anhydrase | (iii) | Haemoglobin |
(d) | Primary site of exchange of gases | (iv) | R.B.C. |
Options: | (a) | (b) | (c) | (d) |
1. | (i) | (iii) | (ii) | (iv) |
2. | (ii) | (iii) | (iv) | (i) |
3. | (iii) | (ii) | (iv) | (i) |
4. | (iv) | (i) | (iii) | (ii) |
Pneumotaxic centre is located in:
1. Pons
2. Cerebrum
3. Medulla oblongata
4. Thalamus
Central chemoreceptors in the brain respond to changes in the
1. Oxygen concentration in blood
2. Carbon dioxide concentration in CSF
3. Oxygen concentration in CSF
4. Rate of oxidation of food content in the cell
Which substances when present in high level can activate the chemosensitive area present adjacent to rhythm centre?
1.
2.
3.
4.
Chemosensitive area of respiratory centre medulla is affected by
1. less CO2 and H+ ions
2. less O2 and H+ ions
3. excess CO2 and H+ ions
4. excess O2 and H+ ions.
Human beings have a significant ability to maintain and moderate the respiratory rhythm. This is done by neural control. Which of the following is not related with respiration ?
1. Pneumotaxic centre
2. Respiratory rhythm centre
3. Hypothalamus
4. Aortic and carotid body receptors
Aortic arch and carotid artery receptors cannot recognise changes in
1. CO2 Concentration
2. O2 Concentration
3. H+ ions Concentration
4. All of these