Question

7. The body cavity found in the trunk is the ________________ ____________ while the cavity found in the head, neck and the posterior part of the trunk is the__________ ____________.

8. Define homeostasis.

F. Membranes 1. The inner membrane adhering to the surface of the heart is called the ________________ ________________ membrane.

2. The membrane lining the wall of the abdominal cavity is called the ____________________.

3. The two membranes surrounding the lungs are called the _________________ and ________________ layers of the pleural membranes.

4. What is pericarditis?__________________________________________________________

G. Homeostasis 1. List the two types of feedback loops that regulate human body functions. Give a short description of each. a. _______________________ b. ______________________ _________________________________________________________________________

2. Which type of feedback loop maintains homeostasis of most body function? Why?_________________________________________________________________________

MAKE THE CONNECTION 1. The body is in the supine position. If a transverse CT scan is taken at the mid-thoracic region, you will see the _______________ in the center, the two _______________ flanking the lateral sides, and the ____________________ on the posterior side of the image.

2. During the French revolution, those that had been in power were sent to the guillotine (OFF WITH THEIR HEADS!). What kind of section of the body did the blade take? __________________________________

Answer 1

7. The body is divided anatomically into ventral and dorsal cavity.
The ventral cavity is found in the anterior trunk and divided into thoracic and abdominopelvic cavity.
The dorsal cavity is situated in the posterior trunk and divided into cranial and spinal cavity.
Answer : The body cavity found in the trunk is the ventral cavity while the cavity found in the head, neck and the posterior part of the trunk is the dorsal cavity.
8. Homeostasis: homeostasis is the process through which the body maintains a strady internal environment which is necessary to carry out different cellular activities.
F.1. The heart is enclosed within the pericardial sac. The pericardium is divided into fibrous and serous layer. The fibrous layer is outer layer of pericardium while serous layer is the inner layer. The serous layer  is again divided into parietal and visceral layer. The parietal layer is outer layer while visceral layer is inner layer attached to heart.
Answer : visceral membrane.
2. The abdominal cavity is enclosed within a double layered membrane known as peritoneum that supports the abdominal content.
Answer: peritoneum

3. The two membranes surrounding the lungs are called the parietal and visceral layers of the pleura.
4: pericarditis is the infection and inflammation of the pericardial layer of the heart. It caused due to infections from virus, bacteria or other irritating agents.
G1. Homeostasis consists of two feedback loops:

a. Positive feedback loop : positive feedback loop results in decrease lf response of target organ that caused the disturbance of homeostasis to set the balance. Eg : childbirth
b. Negative feedback loop: results in increase of the activity of the target organ. Eg: osmoregulation

2. The most of the body homeostasis is maintained through negative feedback loop. Negative feedback loop consists of a receptor, integrating centre, effector organ and target organ. Activation of negative feedback loop decreases the response of target organ which disturbed the body homeostasis.