Nervous System #1
What is the function of the Nervous System?
To send messages from different parts of your body to your brain; To send messages from the brain to the rest of the body
What does the Central Nervous System include?
Brain and spinal cord
What are the four main functions of the muscular system?
Produce movement, maintain posture and body position, stabilize joints, and generate heat.
What are the main roles of the skeletal system?
Provides protection, makes blood cells, body shape, and stores minerals.
What are two cell types that make up nervous tissue?
Supporting cells (Neuroglia) and Neurons (Nerve cell)
What are the four main parts of the brain?
Frontal lobe, Temporal Lobe, Parietal Lobe, Occipital Lobe
What are the three types of neurons?
Sensory, motor, and relay neurons.
What muscle tissue types have involuntary contractions?
Cardiac and smooth muscle
How many bones does a human adult have?
206
What is the function of connective tissue?
Protecting, supporting, cushioning, and insulating other tissues.
What are the different parts of a neuron?
Dendrites, Axon, Axon Hillock, Axon Terminal, Myelin Sheath, Node of Ranvier, Schwann Cells, and Soma.
What is the Peripheral Nervous System composed of?
It's composed of all the nerves and sensory receptors outside of the Central Nervous System.
What is the jelly organelle of the muscle fiber cell?
Sarcoplasm
What are the two types of skeletons within the skeletal system?
Axial and Appendicular skeleton
What is the difference between vascular and avascular?
Vascular has good blood supply and avascular has poor blood supply.
What is the difference between the Sympathetic and Parasympathetic Nervous System?
The Sympathetic Nervous System stimulates "fight or flight" response while the Parasympathetic inhibits "rest & digest"
What is resting membrane potential?
-70 millivolts
What is the role of tropomyosin in muscle contraction?
To prevent myosin from sliding up the acting filament.
What is the connective tissue that covers the surface of bones?
Periosteum
Which type of epithelial tissue cell appears to have more than one layer?
Peseudostratified columnar epithelial
What happens during depolarization and repolarization?
Depolarization: sodium enters the cell; Repolarization: potassium leaves the cell
What is the threshold for an action potential to be created?
-55 millivolts
What is the role of acetylcholine in calcium release?
Stimulates cellular contraction by opening voltage-gated ion channels.
What is the process of making blood cells called?
Hematopoiesis
Where is transitional epithelial tissue found?
The bladder