RGUHS MBBS Physiology January 2026 (1023 CBME)

1023Rajiv Gandhi University of Health Sciences · Physiology · 2026 · January · CBME

Questions (30)

1.What is the normal plasma calcium level? Describe the physiological actions of hormones in calcium homeostasis? Add a note on Hypocalcemic tetany?
10 Marks
2.Define muscle tone. With the help of a neat labelled diagram of muscle spindle, describe regulation of muscle length?
10 Marks
3.1. A 50 year old bus driver is not able to perform his professional work. He complains of tremor during rest and not able to initiate a movement. He takes short quick steps while walking. Answer the following questions: a) What is your probable diagnosis? b) Explain the pathophysiology underlying this condition c) What is the most commonly used treatment modality?
5 Marks
4.Describe the mechanism and regulation of biosynthesis of thyroid hormones.
5 Marks
5.Describe the functions of cerebellum.
5 Marks
6.Define accommodation in the eye. Trace the pathway and explain the mechanism of accommodation reflex.
5 Marks
7.Explain the stages and regulation of spermatogenesis
5 Marks
8.Describe the molecular basis of skeletal muscle contraction.
5 Marks
9.Name the hormones influencing growth. Describe the actions of Growth hormone on somatic growth.
5 Marks
10.What is synaptic inhibition? What is its ionic basis? What are the types of synaptic inhibition?
5 Marks
11.Children suffering from Cretinism have short stature and mental retardation .why?
3 Marks
12.List the differences between alpha and beta EEG waves. Add a note on alpha block.
3 Marks
13.Acupuncture reduces pain. What is the physiological basis?
3 Marks
14.Draw a labelled diagram showing the origin, course and termination of corticospinal pathway
3 Marks
15.Enumerate the functions of middle ear.
3 Marks
16.Explain the basis of phenomenon of phantom limb in amputated individuals
3 Marks
17.Explain the double Bohr effect across placenta?
3 Marks
18.Explain any three functions of blood testis barrier
3 Marks
19.What is the importance of hormones in gender differentiation?
3 Marks
20.Describe the hormonal control of follicular phase of ovarian cycle
3 Marks
21.The amount of tension actually generated by the cross bridge movement of muscle is called A. Total tension B. Passive tension C. Active tension D. None of the above
1 Mark
22.Tropomyosin A. Helps in fusion of troponin and myosin B. Causes calcium release C. Slides over myosin D. Prevents attachment of actin and myosin
1 Mark
23.Motor aphasia refers to defect in A. Peripheral speech apparatus B. Verbal expression C. Auditory comprehension D. Verbal comprehension
1 Mark
24.Which of the following is the major neurotransmitter in nigro-striatal pathway A. Dopamine B. Noradrenaline C. Acetyl choline D. Serotonin
1 Mark
25.Which of the following sensations are transmitted by the dorsal column pathway A. Fine touch, proprioception B. Pain C. Temperature D. Crude touch
1 Mark
26.The depolarization of hair cell is due to the influx of A. Sodium ion B. Potassium ion C. Calcium ion D. Magnesium ion
1 Mark
27.Bitemporal hemianopia occurs when the lesion is present in the A. Right optic nerve B. Temporal retina C. Optic chiasma D. Left geniculocalcarine tract
1 Mark
28.Which nucleus of thalamus controls visual functions? A. Medial geniculate body B. Lateral geniculate body C. Pulvinar D. Anterior thalamus
1 Mark
29.The dorsal root of spinal cord is sensory and ventral root is motor. This is called A. Weber- Fechner law B. Muller’s doctrine of nerve energy C. Bell – Magendie law D. Law of projection
1 Mark
30.FSH acts on which of the following A. Granulosa cell B. Theca interna C. Endometrium D. Myometrium A.
1 Mark

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