If blood pressure is increased at the arterial baroreceptors, what would happen with the activity level of the parasympathetic nervous system (PNS) and sympathetic nervous system (SNS)?
increased PNS activity and decreased SNS activity
Which of the following would cause vasodilation of
decreased activity of the sympathetic nervous system
Stimulation of the adrenal medulla would result in which of the following?
an increase in heart rate and contractility
A decrease in blood pressure at the arterial baroreceptors would result in which of the following?
a decrease in heart rate
HELP TO PROPEL BLOOD ONWARD
HAVE ELASTIC FIBERS IN TUNICA MEDIA
STRETCH AND RECOIL arteries
Substances absorbed in the intestines would be routed to the liver via the__________.
hepatic portal system
MUSCULAR ARTERIES - DISTRIBUTING ARTERIES
MORE MUSCLE IN TUNICA MEDIA
DISTAL TO ELASTIC - DELIVER BLOOD TO ORGANS
VASOCONSTRICTION AND VASODILATION
DISTRIBUTING ART/DIRECT BLOOD FLOW
ARTERIOLES - RESISTANT VESSELS
SMALL - DELIVER BLOOD TO CAPILARIES
TUNICA MEDIA CONTAIN FEW LAYERS OF SMOOTH MUSCLE -
10 TO 100 FORM CAPILLARY BEDS
VESSELS THAT ARISE FORM ARTERIOLES AND FORM BRANCHES INTO 10-100 CAPILLARIES = CAPILLARY BEDS
PRE-CAPILLARY SPHINCTERS CLOSE AND BLOOD FLOWS OUT OF CAPILLARY BEDS INTO THE THOROUGHFARE CHANNEL
LAYERS OF ARTERIES
TUNICA INTIMA - INTERNA
SIMPLE SQUAMOUS - ENDOTHELIUM
INTERNAL ELASTIC LAMINA
Which vessels carry blood away from the heart?
ELASTIC ARTERIES - CONDUCTING VESSELS
MUSCULAR ARTERIES - DISTRIBUTING VESS
ARTERIOLES - RESISTANCE VESSELS
CAPILLARIES - EXCHANGE VESSELS
What type of tissue is found in the walls of the arteries that leave the heart but not in the walls of the large veins that enter the heart?
endothelium - simple squamous epithelium
FOUND IN SKELETAL & SMOOTH MUSCLE
SKIN, BRAIN , CONNECTIVE TISSUE AND LUNGS
MOST COMMON TYPE OF CAPILLARY
THEIR PLASMA MEMBRANE HAVE HOLES
KIDNEYS, SMALL INTESTINE, CHOROID PLEXUS CILIARI PROCESS AND ENDOCRINE GLAND
INCOMPLETE BASEMENT MEMBRANE
TUNICA MEDIA CONTAIN ONLY FEW SMOOTH MUSCLE CELLS
VERY PORUS ENDOTHELIUM ALLOWING FOR SCAPE OF MANY PHAGOCYTIC CELLS WBC
WALLS VARY BETWEEN CAPILLARY AND VEIN JUNCTIONS IN A GRADUAL TRANSITION
At a given point along a capillary, the net hydrostatic pressure (Net HP) is 20 mm Hg and the net osmotic pressure (Net OP) is 25 mm Hg. What is the Net Filtration Pressure (NFP) at that point?
The subclavian artery that arises directly from the aorta supplies the ________.
left upper extremity and neck
Which of the following is directly involved in long-term blood pressure regulation?
Which of the following would not move by diffusion across a capillary into the surrounding tissue?
Why is it important that blood pressure drop to lower levels as it reaches the capillary beds?
capillaries are fragile and extremely permeable
The circulatory route that runs from the digestive tract to the liver is called ________
Hepatic portal circulation
Substances absorbed in the intestines would be routed to the liver via the________
hepatic portal system
What do the ductus arteriosus and the foramen ovale become at birth?
What is the major factor controlling stroke volume during resting periods?
VENOUS RETURN TO THE HEART
Of the following factors affecting blood pressure, which is (are) the most easily regulated?
VESSEL DIAMETER AND CARDIAC OUTPUT
If baroreceptors are primed to detect blood pressure changes and compensate for them, how is it that some patients suffer from chronic hypertension?
The baroreceptors in these patients have a new higher set point.
Which of the following changes would effect the longest lasting changes in blood pressure?
RELEASE OF ANTIDIURETIC HORMONE
A decrease in 02 level in skeletal muscle would initiate an autoregulatory mechanism that would stimulate _____ in the arterioles supplying the muscle.
Why is vasodilation prominent in the skin when a person increases physical activity?
Heat is dissipated across the skin from the blood to help cool the body.
What role do the lymphatic vessels have when it comes to fluid movements across the capillary beds?
Lymphatic vessels reclaim any fluid from the tissue spaces that doesn't get returned to the blood.
Blood drained from digestive organs empties into the ____ before going through the liver.
HEPATIC PORTAL VEIN
VASODEPRESSOR - EMOTIONAL
SITUATIONAL - URINATION - DEFECAT SEVERE COUGH
DRUG INDUCED SYNCOPE - ANTI-
HYPERTENSIVE DIURETICS VASODILATORS
ORTHOSTATIC HYPOTENSION = EXCESS DECREASE IN BP
VENOUS RETURN DEPENDS ON
PRESSURE DIFFERENCE IN VENULES 16mmhg - to right atrium 0 mmhg
functioning HEART VALVES
SKELETAL MUSCLE PUMP
REPIRATORY PUMP (BOYLE'S LAW)
DECREASE OF THORACIC PRESSURE AND INCREASE IN ABDOMINAL PRESSURE DURING INHALATION, MOVES BLOOD INTO THORACIC VEINS AND THE RIGHT ATRIUM, WHE DIAPHRAGM CONTRACTS