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Use the example of how humans regulate body temperature to explain homeostasis
Shivering and sweating regulates your body by making sure it is not too hot or cold, therefore keeping your body in balance which is what homeostasis is
Which organelle is primarily responsible for maintaining homeostasis in a cell? What macromolecules make up this organelle?
Plasma/Cell Membrane, Lipid (primary) & protein
If a red blood cell were placed in hypotonic solution, like distilled water, what direction would the water move? How would the cell change shape?
More water would be moving inside the cell, causing the shape of the cell grow
A plant was placed in salt water and after viewing it under the microscope you notice that the cell wall is visible but the cytoplasm has shrunk. How did this occur?
The salt water is a hypertonic solution, which means more water is moving outside the cell causing it to shrink
What is the formula for calculating percent change?
(Final-Initial)/Initial*100
Calculate percent mass change for a cell whose original mass was 1.2g and the final mass was .82g
-31.67
What is the levels of organization?
Organelles → Cells → Tissues → Organs → Organ Systems → Organism
How does a person uses many organ systems to accomplish brushing your teeth?
The nervous systems tells the other systems what to do, the muscular system moves your arms and hands to brush you teeth, which are bones aka skeletal system. The digestive system is also involved as the tongue is part of brushing.
How does a rose bush maintain homeostasis in response to drought, dry conditions?
How do birds respond to their external environment when they migrate during seasonal changes?
When the birds’ external environment starts to get colder, the birds receive and interpret this information and realize they need to go somewhere warmer, so the effect/response becomes birds migrating to someplace warmer
Positive or Negative: Feedback from a control that continues to increase the change in normal or optimum levels
Positive
Positive or Negative: Feedback from a control that reverses that direction of change in normal levels leading back to a steady state (normal levels)
Negative
You are caught up in the rain and get drenched and cold. What type of feedback loop causes your body to start shivering and keep warm?
Negative
An apple farmer keeps his apples in a closed barrel. He notices that once a few apples start ripening the others begin to ripen too. What type of feedback loop is causing this to occur?
Positive
When you’re muscles start to shiver, what part of the system does that represent?
Effector
You do an experiment with earthworms and discover that they move away from light. You do some research and learn that they have sensors in their skin that detect light. what part of the system do the light sensors represent?
Receptor
You install an electric dog fence, and are training you dog to learn where the boundaries are. When he approaches the boundary his collar beeps as a warning. When your dog crosses the boundary, he gets a mild shock. Later on, when he hears a beep he backs away. What part of the system does that represent?
Control Center
Nervous system function
Responds to internal/external change by controlling other systems fast: Receive —> Interpret —> Respond
Skeletal system function
Provides structural support and protection muscle attachment and movement
cardiovascular system function
Transports oxygen and nutrients from blood pumped by the heart
Muscular system function
Allows movement and maintains body temperature
endocrine system function
Producing hormones that regulate various body functions
respiratory system function
Exchange of gasses: Keeps blood supplied with oxygen, while removing carbon dioxide
reproductive system function
production of offspring
Lymphatic system function
MAIN DISEASE DEFENSE
Maintains fluid-electrolyte balance by returning leaked fluids to blood vessels
digestive system function
Breaks down food and absorbs nutrients
integumentary system function
Protects deeper tissue from injury with external body covering
urinary system function
Eliminates nitrogenous waste from blood
Bran, spinal cord, sense organs
Nervous system
bones, cartilage, ligaments, and tendons
skeletal system
heart, blood cells/vessels, arteries, veins, capillaries
circulatory system
skeletal, smooth, and cardiac muscle
muscular system
Pancreas, thyroid gland, Pituitary gland, pineal gland, thymus
endocrine system
lungs, nose, diaphragm, trachea, bronchus
repiratory system
ovary, cervix, prostate gland, uterus
reproductive system
white blood cells and lymph nodes
immune system
Pancreas, liver, esophagus, stomach, large & small intestine, tongue, colon, rectum
digestive system
hair, skin, and nails
integumentary system
urethra, kidney, bladder, ureters
urinary system
