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Blood
Heart
Blood Vessels
Surprise
True/False
100

What are the three functions of blood? 

Distribution (o2 and nutrients, waste, hormones) , regulation (body temperature, ph buffering, fluid volume+ pressure), protection (clotting, defense against infection) 

100

What connects cardiac muscle? 

Gap Junctions 
100

Most arteries are classified as what type? 

Medium arteries 

100
How do we find cardiac output? 

Heart Rate X Stroke Volume

100
RBCs consume some of the oxygen they carry 

False 

200

What is a typical hematocrit volume? 

males 45-52% females 37-48% 

37-52% 

200

Compare systemic and pulmonary circulation 

Pulmonary: to lungs, less pressure needed... 

Systemic: to body, much greater pressure... 

200

What are the characteristics of medium veins? 

Thick tunica media and valves 

200

What are the three plasma proteins? 

Albumin, Globulin, Fibrinogen 

200

Type O blood is the universal donor for RBC

True 

300

Explain the form and function of a RBC 

Small to access capillaries, biconcave disc provides large surface area for gas exchange, no nucleus, no mitochondria, no organelles (WHY it doesn’t consume any O2)

300

What are the 4 events of a complete cardiac cycle? 

Ventricular filling, Depolarization, Atria relax and ventricles depolarize, relaxation 

300

what three factors influence peripheral resistance? 

blood viscosity(determined by high rbc count/hematocrit)(greater thickness=less fluidity), total vessel length (resistance goes up w distance traveled), bv diameter (smaller vessel= greater friction)

300
Where is the cardiac center? 

The medulla oblongata (brain) 

300

Arteries always move towards the heart 

False

400
Describe an eosinophil and what is its purpose? 
  • Eosinophils- 2 big lobes, pinker, eat parasitic worms
400

What is the path of cardiac conduction? 

  • SA node -> AV node -> AV bundle -> Bundle branches -> purkinje fib
400

What are the three types of capillaries and what are their characteristics? 

  • Continuous: skin & muscles- uninterrupted lining w tight junctions, standard capillary endothelial lining 
  • Fenestrated: intestines, endocrine, kidney- has pores/holes in capillary wall which makes them extra leaky when it comes to absorbing nutrients 
  • Sinusoidal: liver, bone marrow, lymph, super leaky, allows large molecules to pass
400

What is the purpose of erythropoietin? 

Stimulate RBC production! 

400

Capillaries are never permeable 

FALSE 

500

What are the three steps of hemostasis, and what is the end goal? 

1) vascular spasms 

2) platelet plug formation 

3) coagulation (clotting) 

Fibrinogen -> fibrin 

500

An influx of what ion triggers action potentials in the cardiac muscle 

Sodium 

500

The net draw of water IN is from... 

The net draw of water OUT is from... 

  • Net draw of water IN from osmotic pressure 
  • Net draw of stuff OUT from hydrostatic pressure 
500
What is the purpose of coronary circulation? 

Blood flow to the heart! 

500

The majority of our blood is stored in veins 

True