The rapid depolarization in cardiac muscle is due to
1. Ca++
2. Na++
3. K++
4. Mg++

The resting membrane potential of smooth muscle cells is
1. -20 to -30
2. -50- to -70
3. -70 to -90
4. -90 to -110

False about saltatory conduction
1. It occurs in nonmyelinated nerves
2. Depend on nodes of ranveir
3. It’s a fast process
4. Lower energy is consumed

FALSE about excitatory post synaptic potential
1. Its localized
2. Summating
3. It weans of in exponential rate
4. Hyperpolarisation occurs

central chemo receptors are stimulated by
1. H+ ions
2. Co2
3. Hypoxia
4. Hco3

prolactin inhibiting substance is
1. dopamine
2. adrenalin
3. thyroxin
4. ACTH

Duration of atrial systole
1. .53
2. .28
3. .08
4. .11

Peripheral resistance is inversely proportional to
1. Diameter
2. Vasomotor tone
3. Cardiac output
4. Viscosity

ADH is released in
1. Increased ECF volume
2. Increased ECF osmolarity
3. Increased BP
4. Deceased ECF osmolarity

Which is ideal for GFR estimation
1. Inulin clearance
2. PAHA clearance
3. Urea clearance
4. All the above

Lifespan of RBC is...
1. 100days
2. 120 days
3. 60 days
4. 160 days

Which of the following is true about surfactant
1. It decreases the compliance
2. It degreases pulmonary edema
3. It increases surface tension
4. It enhance the collapse of alveoli

What is the pressure of inspiration?
1. Intra plural
2. Trans pulmonary
3. Trans chest wall
4. Intra bronchial

Heart muscle acts as a functional synctitium because
1. Striations
2. Gap junctions
3. Long action potential
4. It is involuntary

Bleeding time is done to assess
1. Platelet function
2. Intrinsic pathway
3. Extrinsic pathway
4. Coagulation cascade

Angiotensin is activated in
1. lung
2. liver
3. kidney
4. intestine

Which is the corpus luteum salvage hormone which maintains corpus luteum
1. B-HCG
2. FSH
3. AFP
4. Estrogen

Velocity of blood flow is inversely proportional to
1. Square of radius
2. Compliance of vessel wall
3. Cardiac output
4. Stroke volume

Systolic BP is directly proportional to
1. Compliance of vessel wall
2. Stroke volume
3. Radius of vessels
4. Elasticity of vessel

normal pco2 of arterial blood
1. 20
2. 40
3. 60
4. 80