Endocrine and Nervous Systems: Functions and Hormones
Endocrine and Nervous Systems
Nervous System: Fast action and very short duration. Effect is localized and fleeting.
Endocrine System: Action is slow but long-lasting. Effect is widespread, medium and long term.
Major Glands
Pituitary, Thyroid, Parathyroid, Adrenal, Pancreas, and Ovary/Testicle.
Hormones
A hormone is any chemical secreted in body fluids by a cell or a group of cells that has a control function. It is secreted and acts at a specific location.
Local Hormones
Produced in the system itself
Read MoreDigestive and Urinary Systems: Key Functions
Digestive System Functions and Processes
- Which of the following is not a function of the digestive system?
Filtration - The activities of the digestive system are regulated by:
All of the above - Sandwiched between the layer of the circular and longitudinal muscle in the muscularis externa is the:
Myenteric Plexus - Functions of the large intestine include:
All of the above - Digestion refers to the:
B and C only - Functions of the stomach include all the following, except for:
Absorption of triglycerides - Which
Understanding Sheep Farming: Herd Composition and Practices
Sheep Farming: Herd Composition and Management
Sheep Herd Structure
Ewes (Bellies of the Herd)
- Reproductive females.
- Age: 1.5 years (paddock mated) to 6.5 years (5th breeding).
- Replacement rate: 20% annually.
- Constitute 70-75% of total females in the herd.
Borregas (Breeding Females)
- Breeding females.
- Age: 4-5 months (weaning) to 1.5 years (early races, paddock mated).
- Constitute approximately 20% of total females in the herd.
Rams (Breeding Males)
- Breeding males.
- Age: 1.5 years to 5.5 years.
- Replacement rate:
Photosynthesis, Monera, Protista, Fungi, Plantae, and Animalia Kingdoms
Photosynthesis
In the photosystems, [light energy] is used to form NADPH. In the electron transport chain, the energy of those electrons is used to form ATP. The dark phase occurs independently of light, without using chlorophyll. It takes place in the stroma, and it uses the energy (ATP and NADPH) of the light-dependent phase to fix carbon dioxide and obtain organic molecules. The carbon source is CO2, the source of nitrogen is nitrates and nitrites, and the source of sulfur is sulfates. All this
Read MorePhotosynthesis, Respiration, and Cell Biology: Key Concepts
Where Plants Get Their Mass
Where do plants get most of their mass? The air
Energy Carriers in Photosynthesis and Respiration
Which of the following is NOT an energy carrier involved in either Photosynthesis or Cellular Respiration? G3P
Light Reactions in Photosynthesis
Which of the following are generated by light reactions in photosynthesis? Energy carriers
Location of Photosynthesis Reactions
Where do the light reactions of photosynthesis take place? Thylakoids of the chloroplasts
Where does the Calvin
Read MoreRespiratory System Anatomy: Nose, Larynx, Lungs & Bronchi
Respiratory System Anatomy
Area of Conduct
Formed by a series of interconnected cavities and tubes: nose, pharynx, larynx, trachea, bronchi, bronchioles, and terminal bronchioles. These structures conduct air into the lungs.
Respiratory Tract
The respiratory tract is woven into the lungs where gas exchange occurs, covering the respiratory bronchioles, alveolar ducts, alveolar sacs, and alveoli.
Nose
The internal structures of the nose fulfill these functions:
- Filter, warm, and humidify the incoming air.