Exam #3 Flashcards
Define homeostasis
blood is one of the fluids making the internal environment. Fluids normal function depends on the fluids physical and chemical properties remaining stable
what are the functions of the blood?
transport nutrients, waste and hormones
regulate ph, water content and distribution, and temperature
protect against toxins, microbes and blood loss
what is the ph of blood?
7.35-7.45
what is the viscosity of blood
4
what is the temp of blood
100.4F/38C
what is the pressure of blood
120/80
what is the volume of blood
5 liters
what are the components of blood
connective tissue with a patrix (plasma)
blood= ____+_____
plasma + formed elements
what is plasma
55% of blood volume and contains 92% water, 7% protein- albumin (most abundant), globulins, fibrinogens
gases, electrolytes, waste, hormones,…etc.
what are the formed elements
formed in bone marrow: 45% of blood volume - RBC, WBC, platelets
what is the most abundant blood cell
red blood cell (erythrocyte)
what is the shape of RBC
biconcave disc, no nucleus, contains hemoglobin
what is hemoglobin
what is heme
what protein chains surround the heme group
how many o2 does hemoglobin carry
how many RBC per mL of blood
approx 5 million
how long do RBC live
about 120 days
how many WBC per mL of blood
10,000
