Question

question 16
1 pts
epidemiology is the study of the ____ of diseases in human populations.
○ occurrence
○ distribution
○ transmission
○ all of the above are correct.

question 17
1 pts
of the pathogenic organisms, which of the following are the most complex?
○ viruses
○ tapeworms
○ bacteria
○ protozoa

question 18
1 pts
intrinsic control:
○ usually involves the endocrine or nervous system.
○ operates at the cellular level.
○ is sometimes called autoregulation.
○ operates at the system or organism level.

Explanation:

Question 16

Epidemiology studies the occurrence (how often diseases happen), distribution (where and among whom diseases occur), and transmission (how diseases spread) of diseases in populations. So all these aspects are part of its study.

• Viruses are acellular and simple.
• Bacteria are prokaryotes (simple cell structure).
• Protozoa are single - celled eukaryotes.
• Tapeworms are multicellular flatworms (platyhelminthes) with more complex body structures (organs, organ systems) compared to the others. So tapeworms are the most complex among the given pathogenic organisms.

• Intrinsic control (autoregulation) operates at the local, tissue or organ level (cellular to organ level), not at the system/organism level (that's extrinsic control involving nervous/endocrine systems). It is also called autoregulation and functions at the cellular or local tissue level to maintain homeostasis in organs (e.g., renal autoregulation). The option "is sometimes called autoregulation" is correct as intrinsic control is often referred to as autoregulation. The option "usually involves the endocrine or nervous system" is for extrinsic control. "Operates at the system or organism level" is also for extrinsic. "Operates at the cellular level" is part of it but the most accurate description related to its definition is that it is sometimes called autoregulation.

Answer:

D. All of the above are correct.

Question 17