Which cells are required before an allergic reaction can take place? Eosinophils Neutrophils B cells Macrophages IDON'T KNOWYET

Which of the following would not result in a decrease in the blood vessel radius? plaque formation in the artery wall vasoconstriction vasodilation contraction of smooth muscle in the arterial wall

Where does the energy to make ATP in your cells mostly come from? Water The food you eat The sun The air

What provides energy for your body? sugar pasta carbohydrates all of these

What was Robert Hooke looking at under the microscope when he first saw cells? onion hair cork pea plants

Water carries all of the other nutrients to every cell in your body. True False

Which series correctly lists the organizational levels of the body from the smallest to the largest? tissues, cells, organs body systems cells, tissues, organs body systems body systems, organs tissues,cells cells, organs, body systems, tissues

41. Which of the following is true of arteries? They are smaller and typically carry deoxygenated blood. They contain valves and typically carry oxygenated blood. They have higher blood pressure than veins and carry blood away from the heart. They have thicker walls than veins and carry blood toward the heart.

How does the solubility of gases affect their exchange in the respiratory system? Answers: $A-E$ A Solubility determines the rate of ventilation __ B Gases with higher solubility diffuse more rapidly __ C Solubility is not a factor in gas exchange D Solubility affects the thickness of the respiratory membrane E All gascs have equal solubility

Receptors are structures found at peripheral ending of afferrent neurons. True False

DNA is found within the chloroplast cytoplasm nucleus ribosomes