Tag: coordination in human beings- chemical control
Questions Related to coordination in human beings- chemical control
Which one increases glomerular pressure?
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Renin
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Angiotensin
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Aldosterone
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ADH
- Angiotensin is a polypeptide that narrow blood vessels and thus regulates arterial pressure.
- Angiotensin not only constricts blood vessels all over the body in order to increase systemic blood pressure, but it also works in the kidneys in order to maintain blood pressure in the glomerulus(glomerular pressure) so that the glomerular filtration rate stays normal even in the condition when blood pressure is low. Hence, angiotensin increases glomerular pressure.
Renin is produced by
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Liver
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Spleen
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Juxtaglomerular cells
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Stomach
Erythropoietin is a
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Lipid
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Mucopolysaccharide
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Glycoprotein
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Nucleoprotein
- Erythropoietin is a hormone released by the kidney.
- It is a glycoprotein.
- This hormone helps in the proliferation and differentiation of erythrocyte precursors.
- Thus, they produce red blood cells (RBCs) from the bone marrow cells and this process is also known as erythropoiesis.
- The cells of the kidney that produces erythropoietin are sensitive to low oxygen levels in the blood that travels to the kidney.
- So, the correct answer is 'Glycoprotein'.
Erythropoietin is produced by
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Thymus
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Pituitary
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Heart
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Kidney
Erythropoietin is released by
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Bone marrow
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Spleen
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Kidneys
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Liver
- Erythropoietin is a hormone released by the kidney.
- It is a glycoprotein.
- This hormone helps in the proliferation and differentiation of erythrocyte precursors.
- Thus, they produce red blood cells (RBCs) from the bone marrow cells and this process is also known as erythropoiesis.
- The cells of the kidney that produces erythropoietin are sensitive to low oxygen levels in the blood that travels to the kidney.
- The extrarenal site for erythropoietin release is liver.
- So, the correct answer is 'Kidneys'.
Choose the correct answer from the alternatives given.
Which of the following is not a means by which oxygen and/or carbon dioxide are transported in the bloodstream of vertebrates?
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As oxyhaemoglobin
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As hydrogencarbonate ions
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In solution in the plasma
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Erythropoietin
Carbon dioxide is transported in the blood from the tissue to the lungs in three ways: (i) dissolved in solution in the plasma; (ii) buffered with bicarbonate (i.e as hydrogen carbonate ions) and (iii) bound to proteins, particularly hemoglobin. So, the correct option is 'Erythropoietin'.
Erythropoietin stimulates
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Osmoregulation
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Formation of RBC
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Reduces blood pressure
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Formation of WBC
Chymase is a
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Rennin
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Activator of prorennin
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Activator of chymotrypsinogen
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Gastric juice
- Chymase is a chymotrypsin-like serine protease found in the mast cells and also present in basophil granulocytes.
- Chymase hydrolyzes chymotryptic substrates by activating chymotrypsinogen.
- So, the correct answer is 'Activator of chymotrypsinogen'.
Who among the following discovered the conditioned reflexes?
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Sherington
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Hill
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Pavlov
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Berstain
Conditioned reflex is automatic responses to certain stimuli learnt during lifetime/training. It was studied by Russian physiologist Ivan Pavlov during his experiment on induction of salivation in dogs. Thus, the correct answer is option C.
Which one does not involve brain ?
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Spinal reflex
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Cerebral reflex
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Cranial reflex
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Voluntary action
Reflex is an involuntary and instantaneous action in response to a stimulus.
- A spinal reflex is a reflex action is controlled by spinal cord and related sensory afferent and an efferent muscle without the influence of brain like we remove our hand when we touch hot object.
- Cerebral reflex is an involuntary controlled action that involves brain like a closing of eyes in an exposure of light.
- Cranial nerve is mediated by the pathway that includes cranial nerves and brain includes the peripheral and central nervous system.
- Voluntary actions are those which depends on our will like eating, bathing etc. and controlled by the cerebellum.