Assertion : Thrombin is necessary to initiate blood coagulation.
Reason : Thrombin helps in the formation of thromboplastins.
Assertion : Muscle fibres are said to be contractile in nature.
Reason : Cells of muscle tissues can shorten forcefully and again return to the relaxed state.
Assertion : Blood can be coagulated by adding oxalate (Sodium or Potassium Oxalate) to it.
Reason : Oxalate depresses the action of anticoagulant present in the blood.
Assertion : Thigh muscles can get tired but not the muscles of ventricle of heart.
Reason : Muscles of thigh are voluntary whereas that of heart are involuntary muscles.
Assertion : Smooth muscle fibres do not appear to be striated.
Reason : This is due to regular alternate arrangement of thick and thin filaments is smooth muscle fibre.
Assertion : Non-striated muscles are said to be voluntary in nature.
Reason : Non-striated muscles can be moved according to will.
Assertion : Intercalated discs are important regions of cardiac muscle cells.
Reason : Intercalated discs function as boosters for muscle contraction waves.
Assertion : Presence of connective tissue inside the brain is essential for conduction of nerve impulse.
Reason : Connective tissue hold together the nerve cells of brain.
Assertion : Neurons are said to possess the property of excitability.
Reason : Neurons can get excited by a given stimulus.
Assertion : Non-myelinated nerve fibres do not possess nodes of Ranvier.
Reason : This is due to the absence of nissl’s bodies in node of Ranvier.