The 'U' shaped bone present at the base of the buccal cavity is
Maleus
Ethmoid
Zygomatic
Hyoid
Hyoid
D.
Hyoid
Hyoid bone is a horseshoe-shaped bone situated in the anterier midline of the neck between the chin and the thyroid cartilage. It serves as a point of attachment for some of the muscles of the tongue and floor of the mouth but does not articulate with any other bone.
Which of the following statement is wrong regarding conduction of nerve impulse?
In a resting neuron, the axonal membrane is more permeable to K+ ions and nearly impermeable to Na+ ions.
Fluid outside the axon has a high concentration of Na+ and low concentration of K+, in a resting neuron
Ionic gradients are maintained by Na-K pumps across the resting membrane, which transport 3 Na+ ions outwards for 2K+ ions into the cell.
Resting potential is the electrical potential difference across the resting membrane
Resting potential is the electrical potential difference across the resting membrane
Choose the wrongly matched pair
Portion of myofibril between two 'Z' lines – Sarcomere
Isotropic band – Actin
Anisotropic band – Myosin
Central part of I-band – M-line
Central part of I-band – M-line
When percentage saturation of haemoglobin with O2 is
plotted against pO2 the curve obtained is
J shaped
Hyperbola
Sigmoid
U shaped
U shaped
Label the pans marked in the human skull and select the correct option
A - Temporal bone; B - Parietal bone; C - Sphenoid bone; D - Frontal bone; E - Zygomatic bone; F - Occipital bone
A - Frontal bone; B - Zygomatic bone; C - Occipital bone; D - Sphenoid bone; E - Parietal bone; F - Temporal bone
A - Sphenoid bone; B - Occipital bone; C - Zygomatic bone; D - Parietal bone; E - Frontal bone; F - Temporal bone
A - Sphenoid bone; B - Zygomatic bone; C - Occipital bone; D - Frontal bone; E - Temporal bone; F - Parietal bone
A - Sphenoid bone; B - Zygomatic bone; C - Occipital bone; D - Frontal bone; E - Temporal bone; F - Parietal bone
The striated appearance of a myofibril is due to the distribution pattern of
actin and myosin
fascicles
troponin
meromyosin
meromyosin
Chylomicrons are
small fat globules coated with protein
protein molecules coated with fat
small granules found in gastric juice
neural signals that stimulate, intestinal secretions
neural signals that stimulate, intestinal secretions
Which of the following statement is wrong ?
Sella turcica is a bony cavity where the pituitary gland is located
Parathyroid hormone decreases the Ca2+ levels in blood
Thymosins play a major role in T cell differentiation
The middle layer of adrenal cortex is zona fasciculata
The middle layer of adrenal cortex is zona fasciculata
Match the hormones secreted by various endocrine structures and choose the correct option.
| Column I | Column II |
| i. Hypothalamus | (A) Melanocyte stimulating hormone |
| ii. Pars intermedia | (B) Aldosterone |
| iii. Pineal gland | (C) Gonadotrophin releasing hormone |
| iv. Adrenal medulla | (D) Melatonin |
| v. Adrenal cortex | (E) Catecholamines |
i - E; ii - A; iii - D; iv - B; v - C
i - E; ii - D; iii - A; iv - B; v - C
i - B; ii - D; iii - A; iv - C; v - E
i - C; ii - A; iii - D; iv - B; v - E
i - C; ii - A; iii - D; iv - B; v - E
