Levels of Organization 1
What is the smallest level of organization?
Chemical
Name an example of the highest level of organization
Human (or any other organism!)
Why is homeostasis important for life?
Maintaining balance (e.g. regulating blood sugar, maintaining body temperature, hormones, etc.)
What is the watery fluid produced by serous membranes called?
Serous fluid
What is a result of homeostasis malfunctioning in a particular organ system?
Disease
A group of similar cells that have a common structure and function is said to be the ______ level of organization
Tissue
When two or more tissues come together, this is said to be a(n)
Organ
In many examples of homeostasis, the brain acts as the ______
(hint: slide 25 from chapter 1 lecture notes)
Control center
Clinicians generally recognize 4 abdominopelvic quadrants to recognize pains and injuries, while anatomists use ___ for more precise location of organs.
9
When a response decreases the original stimulus, this is said to be which kind of feedback?
Negative
The spleen is an example of the ____ level of organization
Organ
When put together, the kidneys, ureters, bladder, and urethra make up which level of organization?
Organ system (Urinary)
You are hiking in Arizona on a day when it is 109°F and sunny. After being exposed to the heat for a while, you begin sweating and your blood vessels dilate. Which type of feedback is this?
Negative
How many pleural cavities are there? What is found within them?
2, one for each lung
During childbirth, oxytocin increases its own production to aid in uterine contractions. Which type of feedback is this?
Positive
Which level of organization is a ribosome?
Cellular
Myosin and myosin filaments are part of the same level of organization (True or false?)
False: myosin is chemical level, myosin filaments are cellular level
The temperature in Joe's living room falls below 60°F. This causes the air conditioning to turn on. This is an example of which type of feedback?
Positive
What is found in the peritoneal cavity?
Many of the digestive organs (e.g. pancreas, liver, gallbladder, stomach)
How many organ systems is the thymus a part of?
2! Endocrine and lymphatic
Actin filaments are part of which level of organization?
Cellular
The thymus is a part of which level of organization
Organ
Challenge Question! A fever occurs when body temperature reaches above 100.4°F. This enhances immune function and helps fight the infection. However, the body also tries to cool itself down through sweating when a fever is present. Which type of feedback is a fever?
A fever itself is considered positive feedback, while the body's response to cool down is considered negative feedback. The body continues to keep its temperature high in order to fight the infection, increasing the stimulus of added heat (positive feedback). However, sweating to cool other portions of the body is an example of negative feedback.
This is a central tissue mass that divides the thoracic cavity into two pleural cavities, and includes the pericardial cavity and heart
Mediastinum
Your skin is ______ to your muscles
(Anatomical terms)
Superficial