Systolic pressure A
when atrium is relaxed
B
when the ventricles are relaxed
C
when the atrium contract
D
when the ventricles are contracted

PLEASE I HAVE EXAM RN

Robert wants to know which fertilizer will work the best for his grass. what can he do to explore this inquiry?

Awave has a wavelength of 15 mm and a frequency of 6 hertz. what is its speed?

Ineed to get this test done which of the following statements is correct in hour our immune system responds to a potential pathogen? a.) the skin will be the first line of defense, and then the many phagocytes in the bloodstream will attempt to consume the possible pathogen. b.) b cells will start reading the antigen code immediately and call t cells to assist in destroying the pathogen. c.) the adapted immune system will call on the innate immune system to destroy the pathogen. d.) the t-cells in the adapted immune systems are the first to recognize the pathogen