Module 15-16 Flashcards
There is a reserve of oxygen in the muscles held by ______
Myoglobin
The atrioventricular node fires after the senatorial node
True
Tidal breathing causes the incoming air to mix with some older air in the lungs
True
The slow flow of blood in capillaries facilitates the release of oxygen
True
When the systole occurs the ventricle is contracting
True
The inspiratory and the expiratory reserves make up the total volume in the lungs
False
Red blood cells carry CO2 back to the lungs
False
To prevent back flow of blood in the heart there are…
Valves
The blood flow slows down in the capillaries because the increased total area of the capillary is very large
True
Surfactant is one of the later components made in the fetus (prior to birth)
True
In capillaries the blood pressure pushes nutrients out of the capillaries towards the cells
True
Oxygen is distributed throughout the body by:
The circulatory system
Nutrients and oxygen can leave the arteries and arterioles to reach the cells
False
The oxygen in the circulatory systems functions to bring oxygen to every cell of the body so it can make ATP
True
Once inside the circulatory system _______ is the molecule that binds the oxygen
Hemoglobin
When the diaphragm is relaxed it allows air to leave the lungs inducing the residual volume
False
The two circuits in the heart and the cardiovascular system have the same blood pressure
False
The slow flow of blood in the capillaries facilitates the production of bicarbonates in the blood
True
Unlike other epithelia the epithelia that make up the capillaries have holes in them called frustrations
True
When the ventricles contract blood is pushed out into the artery and the artery stretches because of its elastic layers allowing the blood to continue to flow into the circulatory system while the ventricle is relaxing
True
The lungs have increased surface area to increase the movement of oxygen into the circulatory system
True
Blood moves very rapidly in the capillaries
False
The excretory system uses oxygen because oxygen diffuses more rapidly into the excretory system because it contains water in the urine
False
The heart pace maker that triggers the two atria to contract is the ____________
sinoatrial node
In mammals ventilation is tidal
True
The partial pressure of oxygen in the lungs causes it to load into the circulatory system
True
Veins and venules have valves in them, but arteries and arterioles do not
True
The pulmonary artery contains oxygenated blood
False
The left ventricle of the heart contains more muscle
True
The functional unit of the kidney is the nephron
True
The medulla of the kidney secretes epinephrine
False
The bowman’s capsule is the beginning of the nephron
True
Urine leaves our body through the urethra
True
The kidney gets rid of toxic compounds
True
Each kidney contains about one million nephrons
True
Efferent arterioles enter the bowman’s capsule and efferent arterioles leave the bowman’s capsule
False
In the proximal convoluted tubules useful molecules are collected and brought back into the circulatory system such as glucose and amino acids, but not the toxic materials
True
The bowman’s capsule, the proximal convoluted tubules and the distal convoluted tubule are in the cortex of the kidney
True
Blood pressure is the force that drives molecules out of the glomerulus into the bowman’s capsule
True
Toxins including urea (in mammals) is driven out of the glomerulus into the bowman’s capsule
True
The kidney controls the water balance in the body
True
The inter-weaving of the circulatory system with the nephron is essential for the concentration of urea in the urine
True
Blood pressure drives red blood cells and plasma proteins out of the glomerulus
False
The kidney fillers about 180 liters of blood per day
True
