Answer:
\rb. To accelerate the heart rate by interfering with vagal impulses
Explanation:
Digoxin is a cardiac glycoside which has both the cardiac as well as the electric effects. The most important electrical effect includes early parasympathomimmetic responses(decrease in heart rate) which are followed by late arrhythmogenic actions. Thus the parasympathetic effects of digoxin specifically on atria and AV node results in a decrease in heart rate while atropine in given in this condition because it is a parasympatholytic drug thus it reverses the bradycardia induced by digoxin by interfering with vagal impulses and increases the heart rate .
Hence the option \rb. To accelerate the heart rate by interfering with vagal impulses is true.
Answer: d. Progestrone
Explanation:
A progestrone is a hormone which inhibits the contraction of the uterine muscles and also develops and maintains the lining of the uterus so as to support the development of the fetus till the period of delivery or child birth.
Answer:
Bilaterians have a well developed muscles which are used in both movement from one place to another and for holding things. The main limitations of protist locomotion-mechanisms is that they require medium of water for locomotion. They moved in water through pseudopods, cilia and flagella.
Longitudinal muscle are used by the worms to move from place to place. setae is present in worms which is used to move in forward direction, while jointed appendages which are attached to the body of insects helps in locomotion. Insects have skeleton that is present outside their body which is known as exoskeleton.
External appendages of radiates push the water outside in the backward direction and moved in the forward direction, while bilaterians moves from place to place through their legs which are specialized for this movement and their muscle in their hands are used for holding things.
Answer:
Chemical digestion begins in the mouth when food mixes with saliva. Saliva contains an enzyme (amylase) that begins the breakdown of carbohydrates.
Explanation: