Answer:
Assume that the left ventricle of a child's heart has an EDV=90 mL, and ESV=60mL, and a cardiac output of 2,400 mL/min. His SV is _30_ mL/beat and his HR is _80_ bpm.
Explanation:
Calculation can be achieved by using this formula.
Stroke Volume (SV) = End diastolic volume – End systolic volume
Given that
End diastolic volume = 90
End systolic volume = 60
Calculations
Stroke Volume (SV) = 90 - 60
Stroke Volume (SV) = 30mL / beat
Heart rate can be calculated using this formula:
Heart Rate = Cardiac Output / Stroke Volume
Given that
Cardiac Output = 2400 mL / min
Stroke Volume (SV) = 30mL / beat
Calculations
Heart Rate (HR) = 2400 / 30
Heart Rate (HR) = 80
m bpm
Answer:
Autonomic regulation of heart is via two reflex centers that are found in medulla oblongata
Explanation:
Medulla oblongata contain long stem that makes the upper part of brain case and this is a cone shaped structure which is responsible for autonomic regulation like controlling heart rate,vomiting,respiration,breathing etc.
The heart rate is controlled by autonomic nervous system that are mainly sympathetic and parasympathetic nervous system that releases hormones like catecholamine (epinephrine and non epinephrine) which helps in controlling the heart rate.
Medulla oblongata mainly connects the brain with the spinal cord that are responsible for responsible for the autonomic functions which contain -
Controlling the ventilation via signalling system regulated by chemo receptors which detects change in acidity of the blood.
Acts on cardiovascular centers.
Controlling the reflex centers like vomiting,coughing,sneezing,swallowing etc.
Answer:
Density = Mass/Volume
Density = 216cm3/64g
Density = 3.375 g/cm3
Let me know if this helps!
Answer:
i think its A
Evaporation uses energy, and this heat energy is taken from the body.
Answer:
Impact as greenhouse gases
CFCs were phased out via the Montreal Protocol due to their part in ozone depletion. However, the atmospheric impacts of CFCs are not limited to their role as ozone-depleting chemicals.
Explanation:
