Weeks #20 - 21
what color blindness is most common?
red-green color blindness
how is the real image different from the actual object?
the real image is smaller and upside down, mirrored
what is the function of the Round Window?
it acts as a pressure release valve, allowing fluid in the cochela
Why can a patient with type A blood receive type O?
A patient with type A blood can receive type O blood because type O blood has no A or B antigens on its red blood cells, making it universal for transfusions. It won't trigger an immune response in type A individuals.
Why is the SA Node known as the “Pacemaker?”
because it generates the electrical impulses that initiate the heartbeat, setting the rhythm and pace for the heart's contractions.
why are many people with colorblindness unaware of their condition?
they continue with their life thinking that everyone see's the same colors as them
identify 2 functions for cerumen(earwax):
1. repels insects
2. traps foreign antibodies
identify 2 causes of anemia
Iron deficiency
Blood loss
Why do these Valves have AV in their Name? (AV Tricuspid Valve and AV Mitral Valve)
The "AV" in AV Tricuspid Valve and AV Mitral Valve stands for Atrioventricular
What is Atrial Flutter?
Atrial flutter is an abnormal heart rhythm
why is the optic disc considered a blind spot?
Devoid (absent) of lights sensative cells(rods and cones)
what is the function of the cochela?
it makes sound waves convert into electrical impulses
What is the major function of the Cardiovascular System?
To transport oxygen, nutrients, and waste throughout the body.
Why are the Pulmonary Arteries blue when other arteries are red?
The pulmonary arteries are blue because they carry deoxygenated blood from the heart to the lungs. Most arteries carry oxygenated blood, which is why they are shown as red, but the pulmonary arteries are the exception.
Explain what Heart Block is.
Heart block is a condition where the electrical signals in the heart are delayed or blocked as they travel through the heart's conduction system
contrast cone and rod cells:
cone= color sensitive
rod: color(shape) sensitive
identify the perceptual equivalents for sound frequency and amplitude:
Freq= pitch
Amp= loudness
Why do Atria have thin walls and Ventricles have thick walls?
Atria have thin walls because they only need to pump blood to the ventricles. Ventricles have thick walls to generate enough force to pump blood to the lungs (right ventricle) and the rest of the body (left ventricle).
Identify the 3 layers of the Heart wall.
Epicardium (outer layer)
Myocardium (middle muscular layer)
Endocardium (inner layer)
What are Heart Murmurs?
Heart murmurs are abnormal sounds, usually heard during a heartbeat, caused by turbulent or irregular blood flow within the heart.
where is the retina located?
posterior half of interior of globe
List the order the 3 ossicles vibrate from sound waves(1-3):
1. Incus
2. Staples
3. Mulllas
Why is it important to measure a patient’s:
1. Hematocrit. 2. Buffy Coat?
bc we can diagnose them
Why do we have Heart Valves?
Heart valves ensure that blood flows in one direction through the heart, preventing backflow and maintaining efficient circulation.
What is Fibrillation and what does it cause death from?
Fibrillation is an irregular heart rhythm. Atrial fibrillation (AFib) affects the atria and can lead to stroke or heart failure, while ventricular fibrillation (VFib) affects the ventricles and causes sudden cardiac arrest, which can be fatal without immediate treatment.