Cells and Body Systems Flashcards
Why should a toothpick be used to lower the cover slip over a wet-mounted specimen on a slide?
A toothpick is used to lower the cover slip so that it can be more easily lowered keeping one edge of the cover slip on the slide. In this way, any air bubbles present are squeezed out as the cover slip is lowered.
Dropping the cover slip onto the wet mount will usually trap large air bubbles under the cover slip with the specimen, obscuring the image.
Where is the mitral valve located?
Between the left atrium and the left ventricle
What is diastolic pressure?
The pressure with which blood is pushed through the arteries when the heart relaxes
Where are proteins made inside a cell?
In ribosomes
Roughly how many different types of cell are there in the human body?
20
What type of cell contains fibres that expand and contract?
Muscle
Approximately how long does a human red blood cell last before it is replaced?
3-4 months
What is the function of the aorta?
It carries oxygenated blood from the left ventricle to the body.
What scientific name is given to the tiny air sacs in the lungs?
Alveoli
What is the main function of the palisade cells?
To perform photosynthesis
What is the function of the epiglottis?
To ensure foods does not enter the trachea
Where are the plant epidermal cells found?
On the outside of the leaves
Where in the digestive tract are most nutrients absorbed into the bloodstream?
Small intestine
What is the function of the aorta?
It carries oxygenated blood from the left ventricle to the body
In what order does oxygen pass through the parts of the respiratory system?
Trachea, bronchus, bronchiole, alveolus, capillary
