The pivot joint between atlas and axis is a type of

• Fibrous joint

• Cartilaginous joint

• Synovial joint

• Synovial joint

Out of 'X' pairs of ribs in humans only 'Y' pairs are true ribs. Select the option that correctly represents values of X and Y and provides their explanation :

• X = 12, Y = 7
  True ribs are attached dorsally to vertebral column and ventrally to the sternum

• X = 12, Y = 5
  True ribs are attached dorsally to vertebral column and sternum on the two ends

• X = 24, Y = 7
  True ribs are dorsally attached to vertebral column but are free onventral side

• X = 24, Y = 7
  True ribs are dorsally attached to vertebral column but are free onventral side

A baby boy aged two years is admitted to play school and passes through a dental check-up. The dentist observed that the boy had twenty teeth.
Which teeth were absent?

• Incisors

• Canines

• Pre-molars

• Pre-molars

Which of the following hormones can play a significant role in osteoporosis?

• Aldosterone and Prolactin

• Progesterone and Aldosterone

• Parathyroid hormone and Prolactin

• Estrogen and Parathyroid hormone

145.

Calcium is important in skeletal muscle contraction because it

• Binds to troponin to remove the masking of active sites on actin for myosin.

• Activates the myosin ATPase by binding to it.

• Prevents the formation of bonds between the myosin cross bridges and the actin filament.

• Detaches the myosin head from the actin filament.

Match the items given in Column I with those in Column II and select the correct option given below

Column I		Column II
a	Glycosuria	i	Accumulation of uric acid in joints
b	Gout	ii	Mass of crystallised salts within the kidney
c	Renal calculi	iii	Inflammation in glomeruli
d	Glomerular nephritis	iv	Presence of in glucose urine

• a	b	c	d
  iii	ii	iv	i

• a	b	c	d
  i	ii	iii	iv

• a	b	c	d
  iv	i	ii	iii

• a	b	c	d
  ii	iii	i	iv

The globular head of myosin contains

• Calcium ions in large quantities

• Troponin

• ATPase enzyme

• ATP

Dense regular connective tissue is present in

• ligament and tendons

• Joint capsule and Wharton's jelly

• Periosteum and endosteum

• Pericardium and heart valves

Sliding filament theory can be best explained as

• When myofilaments slide pass each other actin filaments shorten while myosin filament does not shorten

• Actin-myosin filaments shorten and slide pass each other

• Actin and myosin filaments do not shorten, but rather slide pass each other

• When myofilament slide passes each other myosin filament shorten while actin filament do not shorten.

Select the correct combination of statements regarding Myasthenia gravis.

1. It is an auto-immune disorder.
2. It causes insufficient acetylcholine binding that effects muscular contraction.
3. Antibodies are developed against acetylcholine
4. Antibodies are developed against acetylcholine receptors.
5. It causes drooping of eyelids.

• I, III, IV,V

• I, III,V II

• I, II, IV, V

• II, III, IV, V