MCQ Bank
QRS Complex indicates _____ of ventricles.
- A) Hyperpolarization
- B) Repolarization
- C) Spike potential
- D) Depolarization
During diastole the ____ valves are closed.
- A) Purkinji fiber
- B) Vana cava
- C) Aortic
- D) Ventricular
_____ lungs in amphibians are just like a smooth-walled pouch.
- A) Spongy
- B) squamata
- C) Urodeles
- D) Bilateral
Cardiac impulses causes _____ changes while passing through the heart muscles.
- A) Pressure
- B) Electrical
- C) Chemical
- D) Mechanical
Kymograph Apparatus consists of a revolving drum to which a writing ____ is attached
- A) Graph
- B) Drum
- C) Pen
- D) Stylus
Left _____ pumps oxygenated blood into the aorta.
- A) Auricle
- B) Ventricle
- C) Atria
- D) Vein
Acetylcholine increases _____ ion conductance of pacemaker cells.
- A) HCL
- B) Cl-
- C) K+
- D) Na+
Flow of blood depends both on pressure and ____ energy
- A) Gradient
- B) Force
- C) Potential
- D) Kinetic
Kymography does not helps to study the effects of _______ on cardiac output.
- A) Temperature
- B) Vasopression
- C) ACH
- D) Epinephrine
_____ blood pressure is highest during ventricular systole.
- A) Capillaries
- B) Heart
- C) Venous
- D) Arterial
Quantity of blood pumped into the aorta each minute by the heart is called as _____.
- A) Pacemaker
- B) Diastole output
- C) S.A node output
- D) Cardiac output
Acetylcholine slows the heart rate that is called as negative _______.
- A) Isotropic effect
- B) Anisotropic effect
- C) Chronotropic effect
- D) Masking effect
Cross sectional area of airways decrease in diameter of individual air ducts from _____ to the terminal bronchioles.
- A) Air sacs
- B) Trachea
- C) Alveoli
- D) Lungs
Resistance to flow is overcome by pressure when the heart contracts and the pressure in the ____ increases
- A) Arteries
- B) Ventricles
- C) Vanacava
- D) Aorta
In which aquatic habitat are cichlids and poecilids commonly found?
- A) Deep-sea trenches
- B) Polar ice caps
- C) Secondary freshwater
- D) Primary fresh water
The authors examinates for global fisheries employment are _________ times higher than the Foods and Agriculture Organization estimates.
- A) 1.15
- B) 2.55
- C) 1.75
- D) 1.25
The ____________ecosystem is an aquatic ecosystem that includes lakes, ponds, rivers, streams and wetlands.
- A) saltywater
- B) marinewater
- C) freshwater
- D) tresstrial
The number of individuals and total biomass_________at successive trophic levels as organisms _________in size.
- A) increase, decrease
- B) none of these
- C) decrease, increase
- D) remains same, increase
During summers, the temperature of the freshwater ecosystem generally ranges from _________ Fahrenheit.
- A) 38-61 degrees
- B) 10-71 degrees
- C) 20-91 degrees
- D) 30-71 degrees
The gill rot (branchyomyces) of carps involves the attack of __________on the gills of carps.
- A) Agaricus
- B) Saprolegnia
- C) Auricularia cornea
- D) Boletus