According to the Frank-Starling law Select one:

a.
the more calcium available to the heart cell, the more forcefully it will contract.

b.
the faster the heart rate, the larger the stroke volume.

c.
as the volume of blood entering the heart increases, ventricular contractions become more forceful.

d.
the greater the resistance from the arteries, the higher the blood pressure.

Atypical human cell is approximately 12.00 μm in diameter and enclosed by a membrane that is 5.000 nm thick. (a) what is the volume of the cell including the membrane? (b) what is the volume of the cell membrane? (c) what percent of the total volume does its membrane occupy? to simplify the calculations, model the cell as a sphere. enter your answers using four significant figures.

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

45 points how are people today being protected from tsunamis? earthquake data is analyzed to detemrine if a tsunami is likely, and if so, warnings are sent out. areas in tsunami risk zones are no longer heavily populated. radar is used to measure wave heights regularly. meteorologists study the winds to determine if wave heights will be large.