Unit 1
which organ system fights against foreign substances
lymphatic
what is the function of simple squamous epithelium tissue?
fast diffusion (filtration, gas exchange)
which glial cell forms myelin sheaths in the CNS?
oligodentrocytes
Your patient has a tumor developing in their prefrontal cortex. What change would you expect to occur?
personality change
Which muscle tissue is involuntary and lines hollow tubes?
smooth muscle
Describe the function of the rough ER
modifies and packages proteins to be send out via the Golgi apparatus
what type of epithelial tissue would we expect to find in the trachea?
ciliated pseudostratified columnar
what regulates resting membrane potential in a neuron?
Na K ATPase
Beta 2 receptors are found on what organ?
lungs
what CT sheath surrounds the entire muscle organ and is made up of dense regular CT?
what is homeostasis
maintain stable internal environment despite ever-changing external environment
which CT is made up of fibroblasts and WBCs and is found under epithelial tissue and surrounding organs?
areolar
what breaks down ACh in the synaptic cleft?
acetylcholinesterase
the preganglionic of the sympathetic NS releases ____ it binds to ____ on the postganglionic neuron. The postganglionic neuron then releases ______ which binds to _____.
ACh, nicotinic, Norepinephrine/ epinephrine, alpha or beta
ACh binds to _____ receptors on the sarcolemma, creating a graded depolarization called __________.
nicotinic, endplate potential
what is afferent? what is efferent?
afferent- sense, efferent- effect/ motor
which cartilage has no visible fibers and provides support, reinforcement, and cushion?
hyaline
what can increase AP speed
myelination, diameter,
the preganglionic of the parasympathetic NS releases ____ it binds to ____ on the postganglionic neuron. The postganglionic neuron then releases ______ which binds to _____.
ACh, nicotinic, ACh, musacranic
describe the role of troponin and tropomyosin. (what are they bound to? What do they do? When do they unbind?)
troponin keeps tropomyosin bound to actin subunits until Ca binds. This keeps myosin from binding to the actin
Define both positive and negative feedback and give an example of each.
negative- negates: shivering, sweating, blood sugar, blood calcium
positive- increases: birth, blood clotting
which CT offers tensile strength in one direction and has a uniform waved appearance?
dense regular
what are the three steps of an AP and which channels open and close during them?
depolarization (Na open), repolarization (Na close, K open), hyperpolarization (K remain open)
what do the following receptors sense?
chemoreceptors
photoreceptors
nocioceptors
chemicals, light energy, pain
list the steps of the sliding filament theory in order.
cross-bridge formation, power stroke, cross bridge detachment, cocking of the myosin head.