Lab 9 Flashcards
How does ethanol affect the pulse rate of the worm?
It decreases the pulse rate
How does ginseng affect the worm’s pulse rate?
It increases it
How does green tea affect the worms pulse rate?
It decreases it
Which are more numerous between the frog, human and sickle cell blood, erythrocytes or leukocytes?
Erythrocytes
How do the red blood cells of the human differ from those of the frog?
Red blood cells lack nuclei while frog’s cells have nuclei
How do red blood cells in the sickle cell anemia slide compare to those in normal human blood?
Sickle cells are deformed in shape, while normal human cells were round and not deformed
What problems can occur in the sickle cell anemia?
• 5 problems
- Cannot transport gases, nutrients, wastes, hormones,
- Cannot maintain pH
- May not be able to fight off infection
- Cannot clot
- Cannot regulate body temp
Pretend you are a blood droplet in the superior vena cava. What is your path?
- Superior vena cava
- Right atrium
- Tricuspid valve
- Right ventricle
- pulmonic semilunar valve
- Pulmonic trunk
- Pulmonary arteries
- Lung
- Pulmonary vein
- Left atrium
- Bicuspid valve
- Left ventricle
Why is the left side of the heart thicker than the right side?
The left side pumps blood to the whole body and the right side only pumps blood to the lungs
How do the structural differences in arteries and veins relate to its functions?
Arteries are thicker because the blood pressure is much higher in arteries than in veins. Veins also pump blood to the heart so they have to have low pressure
How does an earthworm exchange gases?
It exchanges gases through the role of the respiratory system, the uptake of O2 from the environment and the release of Co2.
Why is an earthworm moist?
Gases have to be dissolved in water before they can enter the animal body
Cutaneous respiration
O2 and Co2 diffuse directly across a moist integument
Describe the appearance of the tracheolar system of the grasshopper?
It consists of a bunch of small, clear tubes that lead gases in and out between the exoskeleton
Tracheolar system process
Gas enters through the spiracles and proceeds through a series of trachea. It diffuses directly from the tracheoles into the muscles and other tissues
