Question

directions: use your plan of attack skills to pull evidence and justify your answer. circle your answer. any question without a plan of attack will not be graded.
the diagram below represents three human body systems. use it to answer questions 81 and 82.
diagram with three human body system illustrations labeled a, b, c

1. which chart below correctly shows what systems a, b, and c provide for the human body?

a

system a	system b	system c

b.

system a	system b	system c

c.

system a	system b	system c

d.

system a	system b	system c

1. what do systems a, b and c all have in common?

a. they all transport blood through veins and arteries to deliver oxygen to every cell.
b. they all work together to move bones and muscles so the body can stand, walk, and run.
c. they all exchange materials with the environment to keep the body balanced.
d. they all send electrical messages through nerves to control how the body thinks and reacts.
checkpoint: go back, check over your work by making sure you have a strong plan of attack for every question!

Explanation:

Question 8 (assuming it's question 8, the first multiple - choice about the systems)

1. First, identify the systems: System A is the respiratory system (lungs, trachea etc.), System B is the digestive system (stomach, intestines etc.), System C is the excretory system (kidneys, bladder etc.).

• The respiratory system is responsible for gas exchange (taking in oxygen, releasing carbon dioxide).
• The digestive system is responsible for breaking down food and absorbing nutrients.
• The excretory system is responsible for waste removal (removing metabolic wastes from the body).
• Option A: The respiratory system does not produce blood cells (blood cells are produced in bone marrow), the digestive system does not produce glucose (it absorbs glucose from digested food), and the excretory system does not produce hormones. So A is wrong.
• Option B: The respiratory system provides oxygen, the digestive system is for absorption of nutrients (not just glucose in the way described), and the excretory system does not provide glucose. So B is wrong.
• Option C: System A (respiratory) - gas exchange, System B (digestive) - nutrients (absorption of nutrients from food), System C (excretory) - waste removal. This matches the functions of the three systems.
• Option D: The respiratory system is not for elimination (excretory is for elimination), the digestive system is not for coordination (nervous system is for coordination), and the excretory system does not deal with carbon dioxide in the way described (respiratory system deals with carbon dioxide). So D is wrong.

1. Analyze each option:

• Option A: The respiratory and digestive systems do not transport blood through veins and arteries. Only the circulatory system does that. So A is wrong.
• Option B: The respiratory, digestive, and excretory systems do not work together to move bones and muscles. The musculoskeletal system is for movement. So B is wrong.
• Option C: The respiratory system exchanges gases (oxygen and carbon dioxide) with the environment, the digestive system takes in nutrients from the environment (food) and excretes some waste, and the excretory system excretes waste (like urine) to the environment. All three systems exchange materials with the environment to maintain the body's internal balance (homeostasis).
• Option D: The respiratory, digestive, and excretory systems do not send electrical messages through nerves. The nervous system does that. So D is wrong.

Answer:

C. System A: gas exchange, System B: nutrients, System C: waste removal

Question 9