Regents Review: Topic 1

Which statement best describes the structural organization of multicellular organisms?

• They are composed of identical cells that function independently without interacting.

• They possess a hierarchical structural organization of interacting systems that perform essential life functions.

• Their organs operate completely separate from tissues and organ systems.

• They rely exclusively on a single body system to execute all life processes.

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What is the primary role of the cardiovascular system in humans?

• It breaks down food into smaller nutrient products.

• It secretes regulatory hormones such as insulin.

• It circulates oxygen, carbon dioxide, glucose, and hormones around the body.

• It takes in oxygen and removes metabolic waste via osmoregulation.

During exercise, an individual's heart rate increases to adequately transport oxygen (O2) and carbon dioxide (CO2) around the body. This is an example of an interaction between which two systems?

• Digestive and Endocrine Systems

• Respiratory and Cardiovascular Systems

• Skeletal and Urinary Systems

• Reproductive and Muscular Systems

The endocrine system helps regulate the body's internal environment by:

• Secreting chemical messengers called hormones directly into the system.

• Generating mechanical movement and metabolic heat.

• Utilizing cell-to-cell nerve transmissions to react instantly to stimuli.

• Transporting oxygen and removing physical waste products.

What are the primary functions of a plant's root system?

• To connect roots to branches and perform the majority of photosynthesis.

• To anchor the plant and absorb water and minerals from the soil.

• To carry out transpiration and house guard cells.

• To transport synthesized sugars directly to the reproductive structures.

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From a biological standpoint, how is "disease" defined in relation to an organism's internal environment?

• A successful positive feedback loop.

• A failure of homeostasis.

• The maintenance of a stable set point.

• An overproduction of standard metabolic energy.

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White blood cells defend the body against foreign invaders by manufacturing specifically shaped proteins called:

• Antigens

• Hormones

• Antibodies

• Antibiotics

How do antibodies target and neutralize specific pathogens (germs or microbes)?

• They alter the host cell's DNA sequence to build a physical barrier.

• They bind directly to matching, specifically shaped antigens on the cell membranes of foreign cells.

• They secrete hormones that lower blood glucose levels across the body.

• They destroy all surrounding cells indiscriminately to prevent replication.

A person's immune system is capable of recognizing and resisting the same pathogen long-term due to the presence of:

• Insulin receptor proteins

• Memory cells

• Guard cells

• Antibiotic treatments

An allergy is best characterized as an:

• Underreaction of the immune system to highly toxic foreign pathogens.

• Overreaction of the immune system to harmless antigens like pollen or peanuts.

• Instantaneous failure of the plant's shoot and root transport system.

• Adaptive positive feedback mechanism triggered by extreme exercise.