PLZZ HELP FASSSSST

1. Which of the following eyects would you expect if red blood cells were shaped like neurons? (1 point)
   

They would not be able to move as easily through capillaries.

They would more easily carry out gas exchange in the alveoli.

They would not need to be transported through the body.

They would become more eyective at picking up urea discarded by body cells.

1. Which of the following is not a function of the skeletal system? (1 point)
   

supports the body

works with other body systems to allow movement

manufactures new blood cells

sends signals to the brain

1. Which of the following body systems are involved in the first line of defense of the immune system
   

against infection?

(1 point)

integumentary, digestive, respiratory

nervous, circulatory, skeletal

muscular, endocrine, urinary

urinary, skeletal, integumentary

1. Which of the following sets of structures would be involved in ridding the body of unwanted urea? (1 point)
   

sensory neuron, interneuron, spinal cord

alveoli, atrium, cilia

capillary, nephron, ureter

brain, esophagus, small intestine

1. An infectious disease is a disease that (1 point)
   

is caught because the weather turns cold.

is caused by pathogens.

can be spread only by bacteria.

cannot be cured.

1. Which of the following statements is true regarding infectious agents? (1 point)
   

Infectious agents are all too small to be seen without a microscope, and none can be classified as living.

All infectious agents are living because they are all classified as microorganisms.

Of all the infectious agents, only viruses are considered living because they actively inject their DNA or RNA

into host cells.

Viruses cannot be treated with antibiotics because they are not living organisms.

1. Which discovery in the 1800s led to the development of germ theory? (1 point)
   

Vaccines could prevent a disease.

Antibiotics exist that can be given to counteract an infection.

Infection rates decline when health care professionals wash their hands in between seeing patients.

Some diseases, such as cancer, are caused by chemical factors.

1. Follow a carbon atom in a piece of bread eaten by a boy. Which of the following describes a path that this
   

atom could take?

(1 point)

mouth esophagus stomach large intestine blood body cell

mouth esophagus stomach small intestine blood body cell

mouth large intestine esophagus stomach blood body cell

mouth esophagus small intestine stomach blood body cell

1. Which of the following sets of structures is innervated by the somatic nervous system? (1 point)
   

esophagus, stomach, small intestine

atrium, ventricle, arteries

biceps, triceps, quadriceps

diaphragm, bladder, large intestine

1. Which of the following cell types would you expect to increase in number azer a person becomes
   

infected with a pathogen?

(1 point)

sensory neurons

white blood cells

epidermal cells

red blood cells