Mock Flashcards
What does rhodopsin break down into?
Rhodopsin, the light-sensitive pigment in rod cells, breaks down when exposed to light, triggering a cascade of events that leads to vision. This breakdown, also known as “bleaching,” involves the separation of retinal (a light-absorbing molecule) from opsin (a protein)
What can PET and FMRI scans do that MRI and CT scans cant?
Understand the functions of the brain throigh analysing the activity of the brain during tasks.
What is the main role of the centromere?
The primary role of the centromere is to ensure accurate chromosome segregation during cell division (mitosis and meiosis) by providing the docking site for spindle fibers and the platform for kinetochore assembly.
How do PET scans work?
PET scans inject a radioactive tracer (like a radioactive form of glucose) into the body. As the tracer is metabolized by the body, it emits positrons, which are detected by the scanner. These detections create a 3D image showing where the tracer is being used.
How does fMRI work?
fMRI uses the same MRI technology but focuses on the brain and its activity. It measures changes in blood flow and oxygen levels in different brain regions that occur when the brain is active.
fMRI can map brain activity during tasks, thoughts, or emotions, helping researchers understand how different brain regions work together.
How does MRI work?
MRI uses strong magnets and radio waves to create detailed images of organs and structures in the body.
How do CT scans work?
CT scans use X-rays to create cross-sectional images of the body. Dense structures in the brain absorb more radiation than less dense structures so show up as a lighter colour on the scan.
What is the main function of the cerebellum?
The cerebellum is primarily responsible for coordinating movements, maintaining balance and posture, and regulating muscle tone
What is the main function of the occipital lobe?
Visual processing
Conpare chorionic villus sampling to amniocentesis.
CVS offers earlier results, allowing for quicker decision-making to abort which is less physically traumatising, while amniocentesis is generally considered safer and more accurate as there is a less of a chance of a misscariage.
What are the risks of taking antihypertensives?
Palipitations (rapid breathing of the heart), abnprmal heart rythms, fainting, headaches and drowsiness are all side effects of blood pressure becoming too low. Other side effects include allergic reactions and depression
