Q: A pacemaker uses electrical shocks to stimulate the what to beat properly? Read this paragraph and choose the correct option from the provided answers: Shock Hazards Electrical currents through people produce tremendously varied effects. An electrical current can be used to block back pain. The possibility of using electrical current to stimulate muscle action in paralyzed limbs, perhaps allowing paraplegics to walk, is under study. TV dramatizations in which electrical shocks are used to bring a heart attack victim out of ventricular fibrillation (a massively irregular, often fatal, beating of the heart) are more than common. Yet most electrical shock fatalities occur because a current put the heart into fibrillation. A pacemaker uses electrical shocks to stimulate the heart to beat properly. Some fatal shocks do not produce burns, but warts can be safely burned off with electric current (though freezing using liquid nitrogen is now more common). Of course, there are consistent explanations for these disparate effects. The major factors upon which the effects of electrical shock depend are 1. The amount of current. Choices: - brain - pancreas - liver - heart A:
heart

(Question)
Q: What is the only marsupial in north america? Read this paragraph and choose the correct option from the provided answers: Most people think of opossums as scary creatures. Is this because they look kind of funny, walk kind of funny, have beady eyes and sharp teeth, and can emit a very foul odor? Maybe. But what is so different about opossums is that they are the only marsupial in North America. Choices: - Raccoon - Didelphinae - Marmosa - oppossum A:
(Answer)
oppossum

Ques: Q: Is urea or salt reabsorbed faster? Read this paragraph and choose the correct option from the provided answers: Choices: - same speed - neither is reabsorbed - urea - salt A:
Ans: salt

(Q).
Q: What is the most common plant-like protist? Read this paragraph and choose the correct option from the provided answers: Ginkgoes, like cycads, has separate female and male plants. The male trees are usually preferred for landscaping because the seeds produced by the female plants smell terrible when they ripen. Choices: - mundane algae - invasive algae - esoteric algae - unicellular algae A:
(A).
unicellular algae

Ques:Q: Inside the nasal area of the skull, the nasal cavity is divided into halves by the what? Read this paragraph and choose the correct option from the provided answers: Inside the nasal area of the skull, the nasal cavity is divided into halves by the nasal septum. The upper portion of the nasal septum is formed by the perpendicular plate of the ethmoid bone and the lower portion is the vomer bone. Each side of the nasal cavity is triangular in shape, with a broad inferior space that narrows superiorly. When looking into the nasal cavity from the front of the skull, two bony plates are seen projecting from each lateral wall. The larger of these is the inferior nasal concha, an independent bone of the skull. Located just above the inferior concha is the middle nasal concha, which is part of the ethmoid bone. A third bony plate, also part of the ethmoid bone, is the superior nasal concha. It is much smaller and out of sight, above the middle concha. The superior nasal concha is located just lateral to the perpendicular plate, in the upper nasal cavity. Choices: - cerebral cortex - cytoplasm - cell wall - nasal septum A:

Ans:nasal septum

Q: What are the two classifications of factors in the environment that affect organisms? Read this paragraph and choose the correct option from the provided answers: Organisms depend on their environment to meet their needs, so they are greatly influenced by it. There are many factors in the environment that affect organisms. The factors can be classified as either biotic or abiotic. Choices: - shear and abiotic - rotational and abiotic - Antibiotick and abiotic - biotic and abiotic A:
biotic and abiotic