12. (a) (i) Name the major blood vessels that carry blood
1 - Leaving Cert Biology - Question 12 - 2005
Question 12
12. (a) (i) Name the major blood vessels that carry blood
1. from the heart to the lungs
2. from the lungs to the heart
(ii) What gas is released from the blood wh... show full transcript
Worked Solution & Example Answer:12. (a) (i) Name the major blood vessels that carry blood
1 - Leaving Cert Biology - Question 12 - 2005
Step 1
Name the major blood vessels that carry blood
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The major blood vessel carrying blood from the heart to the lungs is the pulmonary artery.
The vessel that carries blood from the lungs to the heart is the pulmonary vein.
Step 2
What gas is released from the blood when it reaches the lungs?
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The gas released from the blood when it reaches the lungs is carbon dioxide.
Step 3
Name A, B, C, D.
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
A = larynx (voice box)
B = trachea (wind pipe)
C = bronchus
D = bronchiole.
Step 4
D ends in a small sac. What is the name of this sac?
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The small sac at the end of D is called an alveolus.
Step 5
What is the function of A?
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The function of A (larynx) is to produce sound or speech.
Step 6
B contains rings of cartilage. Suggest a function of this cartilage.
97%
121 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The rings of cartilage in B (trachea) function to keep the trachea open and prevent its collapse.
Step 7
Where is the epiglottis? What is its function?
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The epiglottis is located at the back of the throat (top of the windpipe). Its function is to prevent food from entering the trachea and causing choking.
Step 8
Name the muscles that are used in breathing.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The primary muscles used in breathing are the diaphragm and intercostal muscles.
Step 9
Breathing causes pressure changes in the thoracic cavity. Describe briefly how these pressure changes are brought about.
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
During inhalation, the diaphragm contracts and intercostal muscles lift the ribs, increasing the volume of the thoracic cavity. This decrease in pressure allows air to rush in. Conversely, during exhalation, the diaphragm relaxes and the intercostal muscles lower the ribs, decreasing the volume and increasing pressure, forcing air out.
Step 10
Name a breathing disorder. Give a possible cause of this disorder and suggest a means of prevention or treatment.
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
One common breathing disorder is asthma, which can be caused by allergic reactions, genetics, or environmental factors. Prevention or treatment methods may include the use of inhalers, avoiding allergens, and engaging in exercise for lung health.
Join the Leaving Cert students using SimpleStudy...
